Wood chip pyrolysis oil was used as raw material,and the pretreated bio-oil was polymerized with acrylic acid(AA)and chitosan(CTS)in the presence of ammonium persulfate(APS).A new bio-oil-based environmentally friendly coal dust inhibitor(Hbio-CTS)was prepared.The results show that at 70℃,CTS and AA mass is 0.65 g and 3.00 g,when APS/CTS is 5％,the maximum viscosity of Hbio-CTS synthesized under optimized conditions is 5.4 mPa·s.Both the FTIR and TG properties of Hbio-CTS confirmed that AA and CTS had been successfully grafted on the structure of bio-oil components.The solidified layer formed by Hbio-CTS on pulverized coal is very little affected by wind and rain.Among them,at 17 m/s(classⅦ),the maximum mass loss of pulverized coal was 6.99％.After 8 cycles(56 d),the degradation rate of Hbio-CTS was 57％.
Triclocarban (TCC), a novel antimicrobial agent found in personal care products, has been extensively detected in marine environments. However, research on the toxic effects of TCC on marine organisms remains inadequate. This study delved into the subchronic toxic effects of TCC on the early life stages of marine medaka (Oryzias melastigma, O. melastigma), revealing that TCC could reduce embryo heart rate and hatching rate while diminishing the survival rate of larvae. Biomarker assays indicated that TCC could inflict damage on the embryos' antioxidant and nervous systems. Transcriptomic analysis suggested that TCC could impact cell growth, reproduction, and various life processes, activating cancer signaling pathways, increasing the likelihood of cancer, and exerting toxic effects on the immune and osmoregulatory systems. To validate and enhance our understanding of TCC's unique toxic impact on the osmoregulatory system of O. melastigma, we conducted homology modeling and molecular docking analyses on the protein involved in osmoregulation. The study intuitively revealed the potential binding affinity of TCC to sodium/potassium-transporting ATPase subunit alph (ATP1A1), indicating its ability to disrupt osmotic balance in marine fish by affecting this target protein. In summary, the results of this study will further enhance our comprehension of the potential toxic effects and mechanisms of TCC on the early stages of marine fish, with a specific focus on its unique toxic effects in osmoregulation.
CO2 as cushion gas of underground natural gas storage can not only effectively save the initial capital investment, but also slow down the greenhouse effect and realize the geological burial of CO2.It has important strategic significance and social value for the development and construction of underground natural gas storage.Based on a large number of literature research at home and abroad, this paper summarizes and combs the differences in physical properties between carbon dioxide and natural gas, the mixing mechanism of carbon dioxide as cushion gas and natural gas in natural gas underground storage, the influence of multiple rounds of injection and production in the operation of natural gas underground storage and the influence on the capacity and stability of gas storage under fluid solid coupling, so as to provide reference for the implementation of CO 2 as cushion gas in natural gas underground storage.In addition, it also puts forward the deficiency of theoretical understanding of cushion gas in CO2 as natural gas underground storage, including: ①High-speed non Darcy seepage of gas, the movement law of displacement phase front and the distribution characteristics of mixing zone under the action of alternating load; ②The accuracy of three-dimensional three-phase oil, gas and water injection production dynamic multi physical field coupling model is improved; ③For geological activities in the early stage of natural disasters, which may lead to gas leakage, specific measures shall be taken to deal with emergencies; ④ The geological conditions of gas storage construction are more complex, and its development is more difficult.In addition, the mathematical model of injection production operation evaluation in the whole life cycle of natural gas underground storage operation is established.
用改性红麻秆芯快速吸附废水中微量共存的Pb、As离子,考察了酸碱改性、碳酸钠浓度、改性反应时间等对吸附性能的影响.结果表明,相比于盐酸、柠檬酸和氢氧化钠,碳酸钠改性红麻秆芯对Pb和As均有较好的吸附.最佳改性工艺为:红麻秆芯与0.1 mol/L碳酸钠溶液的固液比1∶80 g/mL,在室温(25℃左右)下以 400 r/min搅拌反应30 min.用0.5g碳酸钠改性红麻杆芯处理 50 mL 0.1 mg/L的 Pb、As废水,在 25℃恒温水浴中,以200 r/min 振荡反应30 min,去除率可分别达到77.7%和21.5%.吸附过程可用准二级动力学方程描述,表明该吸附过程属于化学吸附.
以酱香酒酒糟为碳源,磷酸氢二铵为氮-磷源和活化剂,采用直接物混-高温工艺一步碳化活化制备酒糟基多孔碳材料.通过BET、XRD、XPS、SEM、TEM等进行表征分析,考察了碳材料对Cr(Ⅵ)模拟废水的吸附性能.结果表明,当磷酸氢二铵和酒糟质量比为 1、活化温度为 800℃时,BC800-1 的比表面积、总孔容和微孔容分别达到609.08 m2/g,0.363 cm3/g和0.188 cm3/g,以微孔和小介孔为主,具有部分石墨化结构,表面N、P元素含量分别为3.28%和2.3%.BC800-1 对Cr(Ⅵ)的吸附性能较好,在原始条件下最高吸附量为9.2 mg/g.
