To simultaneously address the pressing challenges of sewage sludge (SS) disposal and coffee grounds (CG) valorization, herein, co-hydrothermal carbonization (Co-HTC) of SS and CG was performed at a dry mass ratio of 1:2 over a temperature range of 180–260 °C to evaluate hydrochar properties and synergistic interactions. Results revealed that hydrochar produced from SS alone (SS260) exhibited poor fuel quality with an ash content of 64.04% and a higher heating value (HHV) of merely 8.56 MJ·kg− 1. In contrast, co-hydrochar (SC260) demonstrated substantially enhanced fuel characteristics: ash content reduced to 38.53%, fixed carbon increased to 10.53%, and HHV elevated to 15.11 MJ·kg− 1 (a 76.5% increase relative to SS260), achieving an overall energy recovery efficiency of 64%. Combustion performance was also markedly improved, with SC180 exhibiting a combustibility index (Ci) of 1.06 and a comprehensive combustion index (S) of 6.37, values far exceeding those of raw SS (0.75 and 2.92, respectively). Notably, significant synergistic effects were observed during Co-HTC: SC260 achieved a carbon retention synergy coefficient of 7.92% and a yield synergy coefficient of 3.05%. Additionally, the resulting co-hydrochar possessed a higher specific surface area (31.54 m2·g− 1) and more developed porous structure compared to single-feedstock hydrochar. These findings demonstrate that Co-HTC of SS and CG is an effective strategy to upgrade hydrochar fuel quality, offering a technically viable approach for the clean and sustainable co-valorization of these two problematic organic wastes.

Sediment is a critical component of aquatic ecosystems, that acts as a natural sink for diverse pollutants such as heavy metals and phosphorus (P). However, the current research on sediment remediation has predominantly focused on single contaminants. In this study, a novel composite material, calcium peroxide/lanthanum-loaded hydrochar (CaO2-LaHyd), was synthesised through the hydrothermal carbonisation of water purification sludge, followed by the sequential loading of lanthanum ions and nano-calcium peroxide. The adsorption capacities of CaO2-LaHyd for P and Pb were evaluated via adsorption experiments, and their passivation mechanisms were investigated through sediment capping simulations. Materials were characterised using scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and energy-dispersive spectroscopy. Results indicated that CaO2-LaHyd exhibited maximum adsorption capacities of 66.05 mg·g⁻¹ for P and 230.41 mg·g⁻¹ for Pb. In the simulated capping experiments, the addition of 5% CaO2-LaHyd significantly reduced the phosphate concentrations in the overlying water. The slow release of oxygen from calcium peroxide improves sediment redox conditions, suppresses endogenous P release, and decreases interstitial P levels. Speciation analysis revealed that CaO2-LaHyd promoted the endogenous P transformation into stable forms while reducing the bioavailable P fractions. Concurrently, it enhanced Pb passivation, thereby mitigating Pb leaching risks from the sediment.

A novel granular waterworks-derived sludge composite (GT La-WDS) was synthesized via green and low-carbon hydrothermal carbonization combined with a calcination-free granulation method, demonstrating exceptional phosphate adsorption performance and potential as constructed wetland filler. Comprehensive characterization (SEM, XRF, BET, FTIR, XRD) revealed its hierarchical porous morphology, chemical composition, and hydroxyl/ligand-functionalized surfaces. Optimal phosphate adsorption capacity (20.11 mg/g) was achieved at pH 4, with adsorption mechanisms dominated by ligand substitution and formation of inner-sphere complexes, as supported by quasi-second-order kinetic modeling and Freundlich isotherm conformity. Dynamic column tests showed prolonged breakthrough (from 168 h to 432 h) and exhaustion times (from 588 h to 2088 h) with increasing bed heights (10 cm to 30 cm), achieving total adsorption capacities of 9.276 mg/g. Effluent phosphate concentrations remained below 0.5 mg/L (Chinese National Effluent Standard Class 1B) for 588 h, with sustained removal efficiency over 2088 h, indicating remarkable longevity. This sludge-derived composite presents a cost-effective solution for phosphorus sequestration, offering dual benefits of eutrophication mitigation and sustainable sludge valorization, with particular relevance to low-carbon constructed wetland systems.

Phosphorus pollution primarily causes water eutrophication. Adsorption, avoiding secondary pollution, is a key research focus for advanced phosphorus removal. Drinking water treatment sludge (DWS) is low-cost and readily available, but its modification relies on inefficient trial-and-error. This study used 657 datasets from 14 sources to evaluate six machine learning models for predicting modified DWS phosphorus removal performance. An improved Hybrid Encoding Genetic Algorithm (HEGA) was developed to inversely optimize modification parameters. Results showed the Gradient Boosting Decision Tree (GBDT) had the highest prediction accuracy (R2 = 0.992). Calcium-aluminum layered double oxides (Ca-Al LDOs) prepared via GBDT-HEGA demonstrated outstanding performance: 96.81 % phosphate removal and effluent concentration of 0.064 mg/L, meeting China's Class III Surface Water Standard (≤0.2 mg/L). In actual lake water tests, removal remained at 87.09 %. Feature importance analysis identified the Ratio as the most critical factor. Optimized material cost was extremely low ($0.8 per kg phosphorus removed). This data-driven approach overcomes traditional optimization inefficiency. The GBDT-HEGA framework provides a novel paradigm for complex environmental process optimization. The Ca-Al LDOs modification technique offers a feasible low-cost solution for water treatment targeting low phosphorus effluent, demonstrating significant practical value.

In this study, we investigated the effects of combined conditioning of water treatment sludge (WTS) with activated persulfate on enhancing dewaterability, phosphorus enrichment, and heavy metal stabilization during sludge treatment. The optimal parameter combinations obtained by Response Surface Methodology were 0.63 mmol/g DS of sodium persulfate (SPS), 0.61 mmol/g DS of Fe2+ and 50

Eight transition metal coordination polymers were synthesized via hydrothermal methods utilizing primary ligand [1,1 ':3 ',1 ''-terphenyl]-3,3 '',5,5 ''-tetracarboxylic acid (H4tpta) alongside auxiliary ligands including phenanthroline (phen), 2,2 '-bipyridine (bipy), pyridine (py), 1,4-bis(pyrid-4-yl)benzene (bpb), 1,2-di(4-pyridyl)ethylene (dpe), and bis(4-pyridyl)amine (bpa). The synthesis yielded three 1D and five 3D coordination polymers, which were formulated as [Ni2(mu 4-tpta)(phen)2(H2O)4] n 6nH2O (1) [Co2(mu 4-tpta)(bipy)2(H2O)4] n 8nH2O (2), [Ni2(mu 4-tpta)(bipy)2(H2O)4] n 7nH2O (3), [Ni2(mu 6-tpta)(py)3(mu-H2O)(H2O)] n 2nH2O (4), [Cd2(mu 6-tpta)(mu-bpb)] n nH2O (5), [M2(mu 6-tpta)(mu-dpe)2] n 3nH2O [M = Co (6), Mn (7)], and [Co2(mu 6-tpta)(mu-bpa)2] n 2nH2O (8). These coordination polymers were meticulously analyzed using standard methodologies to investigate their topological structures and catalytic properties. Remarkably, Co(II) coordination polymer 8 demonstrated remarkable activity in the Henry reaction with benzaldehydes, attaining elevated yields under optimal conditions. Moreover, it demonstrated remarkable stability, high efficiency, and excellent reusability as a heterogeneous catalyst. This work explores the application of H4tpta as the flexible tetracarboxylate linker for the synthesis of functional coordination polymers.

Under the extreme usage scenario, the thermal runaway gases (H2 and CO2) will be produced and leaked from the electrolyte of lithium battery. The molecular structure, adsorption properties, charge density difference (CDD), density of state (DOS), partial density of state (PDOS), desorption time, sensitivity, work function (WF) and frontier orbital theory are investigated to analyze the sensing characteristics toward H2 and CO2 of CdS monolayer, Ag-CdS, Pt-CdS, and Pd-CdS. The optimal CdS monolayer structure consist of hexagons, and the bandgap is 2.043 eV. After heterometal doping, the Eg decreases to 0.339 eV for Ag-CdS, 1.202 eV for Pt-CdS, and 1.358 eV for Pd-CdS. The adsorbing energy of the CdS-H2, Ag-CdS-H2, Pt-CdS-H2, and Pd-CdS-H2 is -2.27 eV, - 0.80 eV, - 0.81 eV, and - 0.81 eV respectively, which correspond to the desorption time of 1.33 x 1026, 27.2, 40.1, and 40.1 s at 300 K in sequence. At room temperature, the response value of Pt-CdS to hydrogen is 78.61%, while the response value of Pd-CdS to hydrogen reaches as high as 98.17%. The Pt-doped and the Pd-doped CdS monolayer shows potential for room temperature H2 sensing, while the CdS monolayer displays the potential for H2 and CO2 cleaning.

In this study, hydrochars were prepared at varying temperatures with distinct mixing ratio, and then the hydrochars were characterized and evaluated for heavy metals to ascertain its potential as a soil conditioner. The application of elevated temperatures resulted in a reduction in the yield of hydrochars, whereas the incorporation of coffee grounds led to an increase in the yield. The blended hydrochar displays elevated ash, fixed carbon, and diminished H/C, O/C, and (O + N)/C ratios, indicating enhanced stability in soil treatment and potential for enhanced soil fertility. The application of hydrothermal carbonization facilitated the stabilization of heavy metals within the sewage sludge, with the stabilizing effect being enhanced by the addition of coffee grounds. Following the application of SCC as a soil conditioner to the heavy metal-contaminated soil for a period of 90 days, it was observed that the heavy metals Cu, Cr, and Ni present in the contaminated soil underwent a transition from an unstable to a stable speciation. Of the treatments tested, AK15 was identified as the most effective, demonstrating a significant reduction in the risk of leaching and biotoxicity associated with Cu, Cr, and Ni in the contaminated soil. [GRAPHICS] .

The one-dimensional yarn-based sweat-activated battery (y-SAB) has been considered a promising power source for textile electronics due to its high flexibility, stable output, and compatibility with conventional weaving/ knitting techniques. However, its practical applications are hampered by its relatively low energy capacity, especially at higher current densities, and the loose binding of the fiber-based separating layer. Here, a coresheath y-SAB fabricated using an electrospun polyacrylonitrile (PAN) nanofiber separator was developed through a conjugated electrospinning technique. This innovative y-SAB design not only achieves a reduced diameter with the tight covering of PAN nanofiber film but also demonstrates almost doubled capacity (28.5 mAh) compared to its counterpart with a cotton yarn separator (15.8 mAh) in artificial sweat. It also delivers higher capacity in harsh electrolytes like 1 M NaCl and 1 M KOH. The remarkable improvement can be attributed to the tight and dense wrapping of the PAN nanofibers around the zinc electrode, which inhibits localized corrosion of the zinc wire and prevents the contamination of the cathode surface by corrosion products such as zinc oxide and simonkolleite. The proposed y-SAB could tolerate 13,000 cycles of bending and 3200 cycles of twisting without significantly reducing its performance, allowing it to be woven into textiles for powering wearable electronic devices. This study introduces an innovative approach for fabricating high-efficacy yarn batteries designed for integration with machine weaving technologies and also provides some insights into the inhibition of localized zinc corrosion in SABs.

The thermal runaway gases, such as CO, CO2, CH4, and C2H4, will leak from the battery electrolyte when lithium batteries in extreme discharge or thermal runaway conditions. The structural properties, differential charge density (DCD), density of state (DOS), gas adsorption properties, desorption time, work function and front-orbit theory calculation of pristine and Au doped CdS monolayer are explored and compared by first-principle calculation. The adsorption energy of CO, CO2, CH4 and C2H4 on the surface of Au-CdS are -0.89 eV, -0.40 eV, -0.14 eV and -0.77 eV, respectively. After doping, the adsorption type of CO and C2H4 are chemical type. Partial density of states shows that the gas molecules react with doped precious metal atoms. The adsorption ability of Au-CdS can be ranged as CO>C2H4>CO2>CH4. C2H4 on the surface of Au-CdS can desorb within 10 second at room temperature. As a result, Au-CdS exhibits tremendous prospective application as CO or C2H4 gas sensor. This study demonstrates that the adsorption and sensing properties of CdS monolayer can be improved effectively by the introduction of precious metal.

Nanosealing technology has become the key to overcoming the wellbore instability problem in deep and ultradeep shale formations. In this Article, the terpolymer poly(MM-EM-BM) was synthesized from methyl methacrylate, ethyl methacrylate, and butyl methacrylate by a Michael addition reaction. The poly(MM-EM-BM) nanoparticles were investigated by Fourier transform infrared spectroscopy, laser scattering analysis, and thermogravimetric analysis. The results imply that the particle size range of poly(MM-EM-BM) is between 33.90 and 135.62 nm and the average diameter is about 85.95 nm at room temperature, which can maintain excellent stability at 382.75 °C. The effects of poly(MM-EM-BM) on the properties of oil-based drilling fluids (OBDFs) were ascertained through experiments on the rheological performance, electrical stability, and high-temperature and high-pressure (HTHP) filtration loss. The results suggested that when the amount of added poly(MM-EM-BM) increases, the apparent viscosity, plastic viscosity, dynamic shear force, and demulsification voltage of the drilling fluids will increase correspondingly; in contrast, the HTHP filtration loss gradually decreased. When poly(MM-EM-BM) is added at 0.75%, the kinetic-to-plastic ratio of the drilling fluids is 0.24 and the filtration loss is 0.6 mL, showing excellent overall performance. The drilling fluids have a good rock-carrying ability and water loss wall-building property. The sealing performance and mechanism of poly(MM-EM-BM) were researched by the method of a sealing performance test under high temperature. The results indicated that the more poly(MM-EM-BM) used, the higher the sealing efficiency of the mud cake and the core as the sealing medium. When poly(MM-EM-BM) was added at 0.75%, the sealing rates of the mud cake and the core as the sealing medium reached the maximum sealing rates of 40.30% and 91.48%, respectively. When poly(MM-EM-BM) enters the core nanopore joint for a certain distance under formation pressure, a tight sealing layer will be formed to effectively prevent the entry of filtrate. Poly(MM-EM-BM) as a potential oil-based nanosealing agent is expected to solve the problem caused by wellbore instability in shale horizontal wells.

Using water treatment sludge and lanthanum chloride as raw materials, lanthanum-modified water treatment sludge hydrothermal carbon was prepared through one-step hydrothermal carbonization and loading lanthanum. SEM-EDS, BET, FTIR, XRD, and XPS were used to characterize the materials. The initial pH of the solution, adsorption time, adsorption isotherm, and adsorption kinetics were investigated to study the adsorption characteristics of phosphorus in water. The results showed that the specific surface area, the pore volume, and the pore size of the prepared materials were significantly increased, and the phosphorus adsorption capacity was greatly improved compared with that of the water treatment sludge. The adsorption process conformed to the pseudo-second-order kinetic model, and the Langmuir model fitted the maximum phosphorus adsorption capacity to 72.69 mg·g-1. The main adsorption mechanisms were electrostatic attraction and ligand exchange. Adding lanthanum-modified water treatment sludge hydrochar into the sediment could effectively control the release of endogenous phosphorus from the sediment to the overlying water. According to the analysis of phosphorus forms in sediment, the addition of hydrochar promoted the transformation of unstable NH4Cl-P, BD-P and Org-P into the very stable HCl-P in the sediment, which reduced the content of potential active phosphorus and also significantly reduced the content of biologically available phosphorus. This indicated that lanthanum-modified water treatment sludge hydrochar could effectively adsorb and remove phosphorus in water and could also be used as sediment improvement material to effectively stabilize endogenous phosphorus in sediment and control phosphorus content in water.

In recent years, porphyrins and metalloporphyrins have attracted much attention in photodynamic therapy and anticancer, and some have been approved for clinical use. Human serum albumin ( HSA) can bind and transport some drug molecules. A detailed study of the binding mechanism of metalloporphyrins and HSA is of great significance in clarifying the action mechanism of porphyrin drugs. This study synthesised three kinds of novel free porphyrins modified with 6-chloronicotinic acid( 4, 5, 6) and their Zn complex (4-Zn, 5-Zn, 6-Zn) and characterized by UV-Vis IR, 1H NMR, elemental analysis, fluorescence spectra and theoretical calculations. The theoretical calculation results showed that the 6-chloronicotinate moieties in the three zinc porphyrins were far away from the porphyrin ring plane. The 4-Zn configuration was more stable than the 5-Zn and 6-Zn configurations with substituents. Under simulated physiological conditions, the bonding modes between three zinc porphyrins and HSA were studied by fluorescence spectra, and the results were calculated according to the Stern-Volmer equation, double-logarithmic equation and Van' t Hoff equation. The experimental results indicated: (1) Three zinc porphyrins could all quench the fluorescence of HSA and the values of K, calculated by the Stern-Volmer equation were much larger than 2. 0 X 1010 L " mol 1 " s 1. Thus the quenching type was static quenching. (2) The binding constants were calculated by a double-logarithmic equation. Except for the 5-Zn at 318 K, other binding constants were all greater than 103 L " mol 1, and the binding sites were close to 1, indicating the formation of a 1 1 complex. (3) According to the Van' t Hoff equation, the thermodynamic parameters AH, AS, AG were all less than 0, eg. those of 4-Zn were calculated to be AH= 123. 9 kJ " mol 1, AS= 322. 9 J " mol 1" K 1, AG= 27. 7 kJ " mol 1(298 K), indicating that the reaction process was spontaneous and the predominant forces between zinc porphyrins and HSA were vander waals force and hydrogen bond. The experimental data obtained in this experiment can provide useful information for studying the interaction mechanism between metalloporphyrins and biological small molecules.

Combined with photoelectric detection technology and UV-Vis absorption spectroscopy in spectral analysis technology, a multi-parameter portable surface water quality detection system is developed, which can quickly detect phosphate, nitrite, and chemical oxygen demand (COD) and ammonia nitrogen water quality parameters on site.For the substances in the water body that absorb the characteristic wavelengths in the visible part, a camera is used to collect the visible spectrum, and the grayscale image of the visible spectrum image is modeled by a convolutional neural network.The concentration value of substances whose absorption characteristic wavelength is in the ultraviolet band is measured by photoelectric detection technology.The established convolutional neural network model is transplanted into ZYNQ, combined with ultraviolet photoelectric sensor, the concentration value of the detected substance is displayed on the LCD, so as to realize the economy, portability, real-time and rapidity of the water quality detector.Research indicates: The prediction value of convolutional neural network is obtained as the tendency value of sample solution in 8 output types of concentration value, the highest accuracy is 100%, and the lowest is 40%.The highest error of COD concentration value is 10%, which proves that the detection system has practical value with low noise and high precision.

Lanthanum-modified drinking water treatment sludge (DTSLa) and thermal-modified drinking water treatment sludge (TDTS) were prepared from drinking water treatment sludge(DTS). The adsorption properties of DTSLa and TDTS on phosphate in water and the effects on the controlled release and morphology of phosphorus in sediment at different dosages (0%, 2.5%, 5%) were discussed. Combining with SEM, BET, XRD, FTIR, and XPS characterization methods, the immobilization mechanism of DTSLa and TDTS on phosphorus in sediment was explored. The addition of TDTS can transform NH4Cl-P (loosely sorbed P), BD-P (bicarbonate-dithionite extractable P), and Org-P (organic P) into stable NaOH-rP (metal oxide-bound P) in sediment, and the conversion amount will increase with the increase of TDTS supplemental amount. DTSLa converted NH4Cl-P, BD-P, Org-P, and NaOH-rP to more stable HCl-P (calcium-bound P). At the same time, the content of WSP (water-soluble phosphorus) and olsen-P (NaHCO3 extractable P) in sediment can be reduced by the addition of DTSLa and TDTS, reducing the risk of the release of phosphorus from the sediment to the overlying water. In addition, phosphorus can be directly removed from the interstitial water by DTSLa and TDTS, so as to reduce the phosphorus concentration gradient between the overlying water and the interstitial water, thus inhibiting the release of phosphorus from interstitial water to overlying water. The results showed that DTSLa is better than TDTS in terms of its adsorption capacity and adsorption effect on endogenous phosphorus in water, so DTSLa is more suitable to be used as a sediment conditioner to control the phosphorus content in water and sediment.

The degradation of coking wastewater using a manganese oxide ore acidic oxidation was investigated. This work was performed in three stages. Firstly, the advantageous degradation conditions were measured by the degradation tests, and under the optimal conditions percentage degradation was obtained of 91.6% chemical oxygen demand measured by potassium dichromate oxidation (CODcr), 94.7% total nitrogen (TN), 98.3% phenols, 98.2% fatty acid, 89.5% tar, and 98.9% sulphide for the oxidized effluent, simultaneously cogenerating a Mn2+concentration of 46.2 g/L for Mn-electrolytic stock solution. Secondly, the transformation analysis of the special chemical group of coking wastewater contaminants illustrated that the employment of manganese oxide ore generated the degradation of low and high molecular weight organics, especially causing polymers to break down into oligomers. Thirdly, the electrochemical characteristics of the interface between wastewater and ore revealed that the contaminant degradation of coking wastewater greatly depended on the oxidation capacity of the surface oxide species, involving a simple answer to the MnO2 oxidation for small-molecule organic materials and a strengthening response to the MnO·OH oxidation for high-weight molecule organic substances. The treatment of coking wastewater using the Mn-oxide ore acidic oxidation process is an effective and value-added method, which is particularly applicable to high-concentration coking wastewater.

Using water treatment sludge and lanthanum chloride as raw materials, lanthanum-modified water treatment sludge hydrothermal carbon was prepared through one-step hydrothermal carbonization and loading lanthanum. SEM-EDS, BET, FTIR, XRD, and XPS were used to characterize the materials. The initial pH of the solution, adsorption time, adsorption isotherm, and adsorption kinetics were investigated to study the adsorption characteristics of phosphorus in water. The results showed that the specific surface area, the pore volume, and the pore size of the prepared materials were significantly increased, and the phosphorus adsorption capacity was greatly improved compared with that of the water treatment sludge. The adsorption process conformed to the pseudo-second-order kinetic model, and the Langmuir model fitted the maximum phosphorus adsorption capacity to 72.69 mg·g-1. The main adsorption mechanisms were electrostatic attraction and ligand exchange. Adding lanthanum-modified water treatment sludge hydrochar into the sediment could effectively control the release of endogenous phosphorus from the sediment to the overlying water. According to the analysis of phosphorus forms in sediment, the addition of hydrochar promoted the transformation of unstable NH4Cl-P, BD-P and Org-P into the very stable HCl-P in the sediment, which reduced the content of potential active phosphorus and also significantly reduced the content of biologically available phosphorus. This indicated that lanthanum-modified water treatment sludge hydrochar could effectively adsorb and remove phosphorus in water and could also be used as sediment improvement material to effectively stabilize endogenous phosphorus in sediment and control phosphorus content in water.

In this study, readily available inexpensive water treatment sludge (WTS) was used to prepare adsorbent for the removal of Congo red (CR) and tetracycline (TC) from aqueous solutions. The structural characteristics and adsorption properties of WTS biochar were characterised via scanning electron microscope, energy dispersive X-ray spectroscopy, Brunauer-Emmett-Teller and Fourier Transform infrared spectroscopy. In batch experiments, the adsorption factors, kinetics, isothermal curves and thermodynamics of the adsorption properties were investigated. The optimum preparation condition of WTS biochar was 400 °C for 4 h under O2-limited pyrolysis, which exhibited increased specific surface area and pore structures. The best adsorption was observed when the pH of the CR and TC solutions was 7 and 4, respectively. The adsorption process followed the pseudo-second-order model, indicating that the main control step was the chemical adsorption process. Isotherm data were best described by the Langmuir model, and the maximum adsorption capacities for CR and TC were 116.4 and 58.5 mg·g-1, respectively. Thermodynamic parameters revealed that the adsorption process was spontaneous and endothermic. According to the analysis, the adsorption mechanism of CR could be attributed to electrostatic attraction, π-π conjugation and hydrogen bonding, whereas that of TC was potentially associated with cation exchange, complex precipitation, π-π conjugation and hydrogen bonding.

在pH为3和5的条件下,研究了芬顿氧化钙体系联合十二烷基二甲基苄基氯化铵(DDBAC)对污泥破解效果及脱水性能的影响,以期减少CaO的用量并同时提高芬顿反应的适用pH.以脱水泥饼含水率(WC)、毛细吸水时间(CST)、过滤时间(TTF)、污泥沉降比(SV)和胞外聚合物(EPS)中蛋白质(PN)与多糖(PS)的含量作为评价指标,对DDBAC投加量做单因素分析,找出其最佳投加量;并比较在不同pH条件下,DDBAC对污泥脱水性能的影响.结果表明,在pH为3条件下,H2O2、Fe2+、CaO、DDBAC投加量分别为60、30、60、60 mg·g-1(DS)时,污泥脱水效果最佳,其Wc为68.57％、CST为24 s、TTF为44 s、SV为72％.最佳脱水条件污泥EPS中的PN、PS总量大幅降低,其中T-EPS含量变化相较于S/L-EPS与污泥脱水性能的变化有更强的联系.在pH为5的条件下,该联合体系也有较好的脱水效果,对芬顿体系在弱酸性环境下使用有一定的参考价值.该联合体系能有效降低CaO的用量,同时能避免处理后的污泥pH过高、易板结的问题,且不会造成二次污染.

At present, emergency treatment methods are selected based on case or technical database, and it is limited to chemicals in pollution accidents covered by the database. Based on the existing emergency treatment technical database, this paper adds a new chemical characteristics database from the physicochemical properties of chemicals such as toxicity and solubility. Combining the weight of characteristic indexes calculated by the Criteria Importance Though Intercriteria Correlation method combined with the Entropy Weight (CRITIC-EW) method and Manhattan distance, a model is constructed to preliminarily select alternative technologies for a target pollutant. Then, Decision-Makers (DMs) can evaluate alternative technologies using the compound language combined comparative language based on hesitant fuzzy linguistic term set (HFLTS) and single language. And alternative technologies are ranked by applying Technique for order performance by similarity to ideal solution (TOPSIS) method. The closest alternative technology is the most suitable. Taking Bisphenol A (BPA) pollution accident as an example, this method is verified. By analyzing physicochemical properties, forms, and uses between similar chemicals and BPA, as well as applicability of alternative technologies, the emergency treatment method proposed in this study is proved feasible.