To address the critical challenges of sluggish C-C coupling kinetics and the propensity for over hydrogenation to ethane (C2H6) in the photocatalytic CO2 reduction to ethylene (C2H4), this study designed a synergistic bimetallic Pt/Co cluster catalyst supported on a covalent organic framework (COF), designated as PtCo-TpBD COF. This catalyst is designed to modulate the adsorption of key intermediates via Co clusters to suppress over-hydrogenation, while leveraging Pt clusters to promote C-C coupling, thereby achieving highly selective C2H4 production. Through a series of structural characterization analyses, it was confirmed that Pt/Co clusters were successfully confined within the pores of the COF, and significant electronic interactions were observed. In situ infrared spectroscopy revealed that the introduction of Co clusters effectively weakens the adsorption strength of the CO* intermediate, while the incorporation of Pt clusters promotes C-C coupling. In visible-light-driven gas-phase CO2 reduction, this catalyst delivered exceptional activity, reaching an C2H4 formation rate of 7.54 mu mol g(-1) h(-1) and an C2H4 selectivity of 90.1%, along with remarkable inhibition of deep hydrogenation byproducts including C2H6. This study not only provides a successful example for constructing efficient bifunctional photocatalysts to achieve highly selective conversion of CO2 to C2H4, but also highlights the great potential of COFs as advanced platforms for integrating multifunctional metal clusters and precisely tuning catalytic selectivity.

Pyrene-based COFs with comparable skeletons but distinct diazine-N arrangements were constructed. In Py-COF-Dz, adjacent N sites optimize local interactions and charge redistribution, enabling efficient gold capture with a high uptake of 3384.39 mg g-1, 30 min equilibrium, good selectivity, recyclability, and acidic CPU leachate recovery.

The ubiquitous presence of the tire rubber antioxidant 6PPD and its toxic transformation product, 6PPD-quinone (6PPDQ), poses emerging risks to aquatic ecosystems. This study evaluated the comparative hepatotoxicity and enterotoxicity of environmentally relevant concentrations of 6PPD and 6PPDQ in adult zebrafish (Danio rerio), with a specific focus on the gut-liver axis. Histopathological analysis revealed that both compounds induced dose-dependent liver damage, characterized by hepatocyte vacuolation and nuclear degeneration; notably, 6PPDQ elicited distinct, and in some aspects comparable, tissue injury relative to the parent compound. Biochemical assays confirmed that oxidative stress is a key mechanism of toxicity, evidenced by elevated malondialdehyde (MDA) levels (increased by up to 62.2%) and glutathione peroxidase (GSH-Px) activity (increased by up to 257.1%), alongside inhibited superoxide dismutase (SOD) and catalase (CAT) activities (reduced by up to 15.2% and 25.3%, respectively). In the intestine, exposure compromised barrier integrity and triggered inflammation, indicated by villus structural damage and the upregulation of NF-κB p65 expression. 16S rRNA sequencing unveiled distinct dysbiosis patterns: 6PPD exposure reduced the abundance of Firmicutes and enriched Proteobacteria, whereas 6PPDQ significantly altered the abundances of Bacteroidetes and Proteobacteria. Functional prediction analysis indicated hypothetical functional shifts, suggesting that 6PPDQ may specifically impair immune-related pathways while enhancing energy metabolism. Collectively, these findings demonstrate that 6PPD and 6PPDQ induce concurrent multi-organ toxicity via the gut-liver axis, with the transformation product 6PPDQ presenting a distinct ecological risk profile. This study highlights the critical need to incorporate transformation products into the risk assessment of tire-derived contaminants.

630 Background: Convergent evidence suggests carcinogenicity of endocrine disrupting chemicals (EDCs). But there is a lack of large-scale epidemiological evidence concerning real-world EDCs mixture exposure and breast cancer (BC). A dataset of emerging knowledge of toxic pathways provides a valuable toolkit to infer the carcinogenicity of chemicals, but current studies of this thus filed are rare. We test whether real-world EDCs exposure, independently or in mixture, increases BC risk in the population, through carcinogenic toxic pathways. Methods: A total of 234,273 women from the UK Biobank cohort were followed for a median of 13.85 years. The annual monitoring record from UK Water Quality Sampling Harmonised was used to estimate the exposure to 13 EDCs (e.g., lead and chlorpyrifos-methyl) for each woman by Kriging interpolation model. The association between EDCs and breast cancer was analyzed by Cox proportional hazard model (for single EDC) and weighted quantile sum (WQS) regression (for mixture). The EDCs were also added to the modified Gail model to test their additional contribution. Twenty-seven Olink proteins were selected via EDC-BC toxic pathway dataset and BC genetic propensity score model to examine their correlation with EDCs. Interaction between EDCs and these proteins and SNPs within their sequence were analyzed by multiplicative model. Results: During the follow-up period, 9,282 women developed BC, 984 of whom died. All the 13 EDCs showed association with increased BC risk. Each unit increase of the 13-EDC mixture was associated with 2.15 fold (95% CI, 2.01-2.31) of BC risk and 4.18 fold of BC-related mortality (95% CI, 3.39-5.17), and 34.38 % of total morbidity and 59.6% of BC-related mortality in the population were attributable to EDC mixture. The risk of hormone receptor-positive BC was higher than that of hormone receptor-negative BC (HR: 2.87 vs HR: 2.03, p = 0.002). The EDCs provided 2.1 % improvement to the modified Gail model of BC prediction. For the 27 Olink proteins referring to BC toxic pathway and genetic propensity score, 26 (96.3%) correlated with at least one EDC (average number ≥8), among which NACC1 protein mediated up to 98.8% (chlorpyrifos-methyl) of the individual EDC’s effect on BC. The EDC mixture showed interaction with multiple proteins, including NACC1 and estrogen receptor 1, on BC-related mortality. Conclusions: Various EDCs in the real world may increase BC morbidity and mortality via common carcinogenic pathways. Future policies of novel EDC emission and safety evaluations must consider the cumulative EDC stressor in the environment because they may act as a whole.

Cu(II) is an essential trace element for the human body, but excessive concentrations in water or the human body can cause irreparable harm to ecosystems and human health. In this study, an amorphous metal-organic frameworks adsorbent (DKTA-MOF) was designed and synthesized using a hydrothermal method for the efficient and selective removal of Cu(II) from water. Various factors affecting the adsorption performance of DKTAMOF were investigated, including solution pH, reaction time, initial concentration of Cu(II), temperature, coexisting ions, and the number of adsorption-desorption cycles. The experimental results indicate that the maximum adsorption capacity of DKTA-MOF is 160.5 mg/g at 318 K, and the optimal adsorption pH is 5. The adsorption process of Cu(II) by DKTA-MOF follows the pseudo-second-order (PSO) kinetic and the Langmuir isotherm models, indicating that the process mainly involves single-layer chemisorption. The adsorption process is spontaneous, driven by both electrostatic attraction and the sharing of lone pair electrons. DKTA-MOF demonstrates highly efficient and selective removal of Cu(II) in the presence of coexisting ions and maintains a high adsorption capacity after six cycles. Furthermore, the strategies and methods adopted in this design provide new perspectives for the removal of metal ions in wastewater.

Understanding the aggregation and settling behaviors of micro/nanoplastics (M/NPs) is essential for predicting their transport and fate in aquatic environments. However, gaps remain in comprehending how particle size and common environmental water constituents jointly influence M/NPs aggregation and sedimentation. This study investigated the effects of metal cations (Na+ and Ca2+) and humic acid (HA) on polystyrene particles of 100 nm (PS-100) and 500 nm (PS-500). The resulted indicated that larger PS-500 particles exhibited lower critical coagulation concentration (CCC) and a stronger tendency to aggregate, yet remained suspended even after aggregation ("aggregation without settling") due to their larger secondary energy minima, lower ion adsorption, and a lower density relative to water. In contrast, smaller PS-100 particles displayed a two-stage behavior of "settling following by floating", driven by stronger ion adsorption that increased their relative density and induced sedimentation ("settling without aggregation"). HA modified these processes differently in Na+ and Ca2+ systems: it increased CCC in Na+ solutions by enhancing electrostatic repulsion, but CCC in Ca2+ solutions through Ca2+-HA complexation and bridging effects. DLVO analysis confirmed that particle size and ion valence jointly controlled energy barriers and secondary minima, determining aggregate stability. Environmental water experiments further revealed that dissolved organic matter (DOM) composition significantly affected aggregation-settling patterns, with protein-like DOM enhancing particle aggregation and floating by competing with ions for adsorption sites. The findings indicate that as microplastics degrade into nanoplastics, their diffusion and settling behaviors change, thereby influencing their distribution in aquatic environments.

The pollution of bisphenol A (BPA) in mine water has become increasingly prominent, posing serious threats to ecosystems and human health, while also constraining the reuse of water resources in mining areas. Microbial fuel cell (MFC) technology, as an innovative green approach that combines pollutant degradation with energy recovery, demonstrates significant potential in treating refractory organic compounds and heavy metals. This article provides a systematic review of the advantages of MFC technology in removing BPA from mine water, with a focus on innovative designs such as photocatalytically assisted anodes (e.g., TiO₂/carbon nanotube composites), stacked MFC configurations, and multiple-anode shared-cathode architectures, which enhance pollutant removal efficiency and power output. Studies indicate that MFC systems can efficiently degrade BPA and remove heavy metals (such as Fe, Mn, Zn) through synergistic microbial metabolism and electrochemical processes, while simultaneously converting chemical energy into electricity, aligning with national strategies for renewable energy development. Although challenges related to cost and operational stability remain for large-scale applications, MFC technology holds broad prospects for environmental remediation and resource recovery in mining areas. Future efforts should focus on optimizing reactor structures, electrode materials, and operational strategies to advance the engineering application of this technology.

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As a noble metal with extremely high economic benefits, the recovery of silver ions has attracted a particular deal of attention. However, it is a challenge to recover silver ions efficiently and selectively from aqueous solutions. In this research, the novel metal-organic frameworks (MOFs) adsorbent (Zr-DPHT) is prepared for the highly efficient and selective recovery of silver ions from wastewater. Experimental findings reveal that Zr-DPHT's adsorption of Ag(I) constitutes an endothermic process, with an optimal pH of 5 and exhibits a maximum adsorption capacity of 268.3 mg center dot g(-1). Isotherm studies show that the adsorption of Ag(I) by Zr-DPHT is mainly monolayer chemical adsorption. Kinetic studies indicate that the internal diffusion of Ag(I) in Zr-DPHT may be the rate-limiting step. The mechanism for Ag(I) adsorption on Zr-DPHT involves electrostatic interactions and chelation. In competitive adsorption, Ag(I) has the largest partition coefficient (9.64 mL center dot mg(-1)), indicating a strong interaction between Zr-DPHT and Ag(I). It is proven in the adsorption-desorption cycle experiments that Zr-DPHT has good regeneration performance. The research results indicate that Zr-DPHT can serve as a potential adsorbent for efficiently and selectively capturing Ag(I), providing a new direction for MOFs in the recycling field of precious metals.

Ongoing coal-to-gas (CTG) largely cut down both coal consumption and associated PM2.5. However, a knowledge gap still existed in CTG impacts on the other energy and organic pollutant emissions. Coupling on-site investigation with statistical yearbooks, we provided a more realistic energy evolutions before (BCTG), during (DCTG), and after (ACTG) the CTG for Hebei Province. Together, we examined the impacts of CTG derived energy conversion on PM2.5-bound PAHs at urban (UA)/suburban rural (SRA)/remote rural (RRA) sites in winter 2022. As expected, the consumptions of coal and natural gas (NG) far decreased and increased from BCTG to ACTG, respectively. Accidentally, biomass usage rose by 60.7%, and rural CTG acted as a main driver. Specially, SRA's NG-shortage and coal-stove demolition should be the main inducements, and RRA's coal-sale ban was another trigger in the early stage of CTG. ∑18PAHs and ∑8TPAHs stand for the sum of 18 PAHs and 8 toxic PAHs, respectively. ∑18PAHs (ng/m3) presented as SRA (81.8) > RRA (46.4) > UA (19.4). Biomass burning (BB) and NG combustion (NGC) contributed most to∑18PAHs of 31.0% and 23.1% at SRA, resulting in the highest ∑18PAHs, ∑18PAHs/PM2.5, and ∑8TPAHs/PM2.5, and incremental lifetime cancer risk values. Also, NGC has become the second largest contributor at UA. Variations in both diagnostic ratios and source-depend isomers further proved the prominence of NGC related PAHs at UA vs. SRA. Notably, RRA was least affected by the CTG, coal combustion (CC, 40.4%) and BB (32.6%) still occupied the top positions. In short, CTG gave rise to an upsurge in biomass usage, and the incremental PAHs emissions from BB vs. NGC. This study underlined that the priorities should be given to rural NG guarantee and subsidy retention, and biomass prohibition for further air quality improvement.

In wastewater-based epidemiology (WBE), the selection of appropriate biomarkers presents a significant challenge. Recently, sulfated bisphenols have garnered attention as potential WBE biomarkers due to their increased stability in wastewater compared to glucuronide conjugates. This study aims to comprehensively assess the feasibility of employing sulfated BPA and BPS as WBE biomarkers by analyzing both WBE and human biomonitoring data. To conduct this research, wastewater samples were collected from six domestic wastewater treatment plants in Guangzhou, China, and urinary concentration of BPA and BPS were obtained from peerreviewed literature. The results revealed that mean urinary concentrations of BPA and BPS, calculated using Monte Carlo simulations, significantly exceeded those reported in human biomonitoring studies. Furthermore, the per capita mass load ratio of sulfated BPA and BPS in human urine to the mass load in wastewater was found to be below 10 %. This outcome suggests that the excretion of BPA-S and BPS-S in urine does not make a substantial contribution to wastewater, hinting at the existence of other notable sources. Consequently, our study concludes that sulfated BPA-S and BPS-S are not suitable candidates as WBE biomarkers. This work provides a referenceable analytical framework for evaluating the feasibility of WBE biomarkers and emphasizes the necessity for caution when utilizing WBE to assess human exposure to chemicals.

Bisphenol analogues (BPs) and natural estrogens (NEs) as two important groups of endocrine-disrupting com-pounds (EDCs) in drinking water treatment plants (DWTPs) have been hardly investigated except bisphenol A (BPA) and three major NEs including estrone (E1), 17 & beta;-estradiol (E2) and estriol (E3). In this study, a GC-MS analytical method was firstly established and validated for trace simultaneous determination of ten BPs and twelve NEs in drinking water, which included BPA, bisphenol B (BPB), bisphenol C (BPC), bisphenol E (BPE), bsiphenol F (BPF), bsiphenol P (BPP), bisphenol S (BPS), bisphenol Z (BPZ), bisphenol AF (BPAF), bisphenol AP (BPAP), E1, E2, E3, 17 & alpha;-estradiol (17 & alpha;-E2), 2-hydroestrone (2OHE1), 16hydroxyestrone (16 & alpha;-OHE1), 4-hydroes-trone (4OHE1), 2-hydroxyesstradiol (2OHE2), 4-hydroxyestradiol (4OHE2), 17-epiestriol (17epiE3), 16-epies-triol (16epiE3) and 16keto-estraiol (16ketoE2). This investigation showed that eighteen out of twenty-two targeted compounds were detected in drinking source waters of eight DWTPs with concentrations ranging from not detected to 142.8 ng/L. Although the conventional treatment process of DWTP could efficiently remove both BPs and NEs with respective removal efficiencies of 74.1%-90.9% and 74.5%-100%, BPA, BPS, BPE, BPZ, E1, 2OHE1, and 2OHE2 were found in the finished drinking waters. Chlorination could remove part of BPs and NEs, but the efficiency varied greatly with DWTP and the reason was unknown. In the finished drinking waters of eight DWTPs, the highest chemically calculated estrogen equivalence (EEQ) derived from BPs and NEs was up to 6.11 ngE2/L, which was over 22 times that could do harm to zebrafish, indicating a potential risk to human health. Given the fact that many chlorination products of BPs and NEs likely have higher estrogenic activities, the estrogenic effect of BPs and NEs in finished drinking water should be accurately examined urgently with the inclusion of BPs, NEs as well as their main chlorinated by-products. This study shed new light on the occurrence, removal, and potential estrogenic effects of BPs and NEs in DWTPs.

BackgroundAssociations between trace elements and nasopharyngeal carcinoma (NPC) have been speculated but not thoroughly examined.MethodsThis study registered a total of 225 newly diagnosed patients with NPC and 225 healthy controls matched by sex and age from three municipal hospitals in Guangdong Province, southern China between 2011 and 2015. Information was collected by questionnaire on the demographic characteristics and other possibly confounding lifestyle factors. Eight trace elements and the level of Epstein–Barr virus (EBV) antibody were measured in casual (spot) serum specimens by inductively coupled plasma–mass spectrometry (ICP-MS) and enzyme-linked immunosorbent assay (ELISA), respectively. Restricted cubic splines and conditional logistic regression were applied to assess the relationship between trace elements and NPC risk through single-and multiple-elements models.ResultsSerum levels of chromium (Cr), cobalt (Co), nickel (Ni), arsenic (As), strontium (Sr) and molybdenum (Mo) were not associated with NPC risk. Manganese (Mn) and cadmium (Cd) were positively associated with NPC risk in both single-and multiple-element models, with ORs of the highest tertile compared with the reference categories 3.90 (95% CI, 1.27 to 7.34) for Mn and 2.30 (95% CI, 1.26 to 3.38) for Cd. Restricted cubic splines showed that there was a linear increasing trend between Mn and NPC risk, while for Cd there was a J-type correlation.ConclusionSerum levels of Cd and Mn was positively related with NPC risk. Prospective researches on the associations of the two trace elements with NPC ought to be taken into account within the future.

The removal of Cr(VI) and Pb(II) from wastewater is one of the methods to ensure water safety. However, it is still a difficult point to design efficient and selective adsorbent. In this work, Cr(VI) and Pb(II) were removed from water by a new metal-organic frameworks material (MOF-DFSA) with numerous adsorption sites. The max adsorption capacities of MOF-DFSA were 188.12 mg/g for Cr(VI) after 120 min and 349.09 mg/g for Pb(II) within 30 min. MOF-DFSA showed good selectivity and reusability after four cycles. The adsorption of MOF-DFSA was an irreversible process with multi-site coordination, and an active site adsorbed 1.798 Cr (VI) and 0.395 Pb (II). Kinetic fitting showed that the adsorption was chemisorption and surface diffusion was the main limiting step. Thermodynamic showed that Cr(VI) adsorption was enhanced at higher temperatures by spontaneous processes while Pb(II) was weakened. The chelation and electrostatic interaction of the hydroxyl and nitrogen-containing groups of MOF-DFSA with Cr(VI) and Pb(II) is the predominant mechanism, while the reduction of Cr(VI) also play an important role in adsorption. In conclusion, MOF-DFSA was a sorbent that can be used for the removal of Cr(VI) and Pb(II).

Bisphenol analogues (BPs) are ubiquitous in the environment and have gained significant attention regarding their associated health risks. However, there is a lack of comprehensive biomonitoring data on BPs and their metabolites in human urine. To address this, we conducted a study evaluate the exposure to BPs in the general population of Guangzhou, China. A total of 1440 urine samples were collected from volunteers and analyzed for the presence of BPs and their metabolites after being pooled into 36 groups based on age and gender. The findings revealed the common detection of ten free-form BPs, as well as the urinary metabolites of BPA and BPS, in the pooled urine samples. BPA was the predominant free-form compound, constituting 50% of the total BPs. The primary urinary metabolites of BPA and BPS are BPA-G and BPS-G, respectively, indicating glucuronidation as their primary metabolic pathway. The composition of urinary metabolites of BPA and BPS varied by age and sex, while the concentration of total BPs in urine was not significantly associated with age and sex. Enzymatic hydrolysis yielded a mean amplification of individual BPs concentrations in urine samples ranging from 1.8 times (BPA) to 4.6 times (BPS). Based on the outcomes, it was estimated that conjugated forms accounted for 96.9%, 96.2%, 94.7%, 94.1%, 92.6%, 89.1%, 87.3%, 87.2%, 87.1% and 85.8% of BPP, BPAF, BPZ, BPE, BPAP, BPF, BPA, BPC, BPS and BPF, respectively, in the pooled urine samples. Preliminary risk assessments indicated that the estimated daily intake of BPA was much higher than the latest proposed tolerable daily intake. Due to the unavailability of health-based guideline values for alternative BPs, some of them exhibit daily intakes comparable to BPA, implying that greater attention should be paid to health risks associated with exposure to BPs.

Background: Sexual violence, especially childhood sexual violence, is a serious social issue, yet the prevalence of childhood sexual violence among university students is unknown. We aimed to investigate the prevalence of these experiences and assess their associations with depressive symptoms.Methods: The study included 29,311 participants, mean (SD) age 20.5 (1.4) years, from a cross-sectional survey of a multi-stage stratified cluster random sample from all universities in Guangdong province of China. Data were obtained through an anonymous electronic questionnaire from December 2 to 15, 2019. Undergraduates' ex-periences of childhood sexual violence were self-reported. Current depressive symptoms were measured by Center for Epidemiological Studies Depression Scale (CESD-10). Stress measures in recent months were measured by the College Student Stress Scale.Results: The prevalence of childhood sexual violence experience among university students was 4.8 % (95 % confidence interval (CI) = 4.6 %-5.0 %), 7.3 % (95 % CI = 6.9 %-7.7 %) for female students and 1.8 % (95 % CI = 1.6 %-2.0 %) for male students. Sexual violence in childhood was related to students' current depressive symptoms after adjustment for stress and socio, demographic characteristics (adjusted prevalence ratio (PRa) = 1.36, 95 % CI = 1.30-1.42). Significant differences in the association between childhood sexual violence and depressive symptoms were also found by sex.Conclusions: Experiences of childhood sexual violence among university students are not negligible and associ-ated with their current depressive symptoms. The association between childhood sexual violence and depressive symptoms among female and male students is different. Schools, families, and society as a whole should be encouraged to provide education on healthy sexual behavior preventive interventions related to sexual violence for childhood students.

Extracellular polymeric substances (EPS) extracted from sludge from wastewater treatment plants (WWTP) have different photochemical characteristics.

Metal cations can be adsorbed on the surface of PSMPs which change the surface properties of PSMPs and lead to the aggregation of PSMPs in aqueous solution. However, previous studies have only examined the processes of aggregation and adsorption independently, without investigating the correlation of adsorption and aggregation. In this study, the adsorption and aggregation experiment were carried out simultaneously and monitored simultaneously. The results of this study reveal that, prior to charge reversal of polystyrene microplastic (PSMPs), both adsorption and aggregation increased gradually with increasing metal cations concentration, and were mutually reinforcing. However, following charge reversal, adsorption increased while aggregation decreased, indicating that adsorption inhibited aggregation. The Zeta potentials of PSMPs increase consistently with increasing metal cations concentrations suggested that electrostatic force was one of the primary mechanisms for the adsorption of metal cations by PSMPs. The FTIR analysis reveal that the peak corresponding to C--C stretching shifted from 1630 cm-1 to 1628 cm-1, 1621 cm-1, and 1615 cm-1 when Ag+, Cu2+ or Cr3+ metal cations were existed, and the results indicated that there might be interactions such as cations-pi between PSMPs and metal cations. This information is crucial in determining the environmental fate and impact of PSMPs that have adsorbed metal cations pollutants.

Because of its irreversible toxicity and harm to people's health, lead contamination has gotten a lot of attention. As a result, the development of low-cost, high-performance removal approaches has become a popular issue. In this work, novel metal-organic framework (AMO-MOF) was developed to selectively adsorb Pb(II) from water. AMO-MOF perfectly inherits the structural characteristics of mesoporous materials and its specific surface area is 255.251 m2/g. The adsorption reached equilibrium at 180 min and the maximum adsorption capacity of AMO-MOF for Pb(II) was 472.73 mg/g. The adsorption of Pb(II) on AMO-MOF was fitted with pseudo-second-order kinetics and Langmuir isotherm models, indicating that the adsorption was monolayer chemisorption process. Thermodynamic and activation energy (Ea) analyses indicate that the monolayer chemisorption of Pb(II) on AMO-MOF was an endothermic process. When multiple cations coexist, AMO-MOF exhibits excellent selectivity for Pb(II). Meanwhile, after repeated used for 5 times, the removal rate can still reach more than 80 %. The adsorption mechanism is mainly the chelation and electrostatic interaction of N and O-containing functional groups on the adsorbent with Pb(II). The excellent adsorption performance of AMO-MOF for Pb(II) makes it have great application potential in practical environmental remediation.

With the increasing pollution of lead in industrial wastewater, many researchers have tried to remove lead ions by various methods. However, while removing lead, some valuable metals are often removed, resulting in loss of economic benefits. It is necessary to develop new materials that can efficiently and selectively remove lead ions without affecting other metals. In this work, a novel Zr-based metal-organic framework adsorbent (UiO-DCCA) is synthesized for the efficient and selective capture of Pb(II) by a novel N,N'-(4carboxylic-pyridine-2,6-diyl) dipicolinimidamide ligand. The selective adsorption experiment shows unique affinity of UiO-DCCA for Pb(II), and the maximum adsorption capacity is 353.29 mg/g. The adsorption mode is single-layer chemical adsorption that conforms with the pseudo-second-order kinetic and Langmuir isotherm models. Density functional theory calculations indicate that the electrostatic interaction of -NH and the chelation of C--N assume a significant part in the adsorption process. This study shows the value of new self-designed organic ligands in metal-organic framework materials that selectively capture heavy metal ions.