Construction,renovation, and demolition waste in landfill: a review of waste characteristics,environmental impacts,and mitigation measures

Environmental Science and Pollution Research - With the increase in global population, industrialization, and urbanization, waste from construction, renovation, and demolition (CRD) activities has...     

Analysis of spatial and temporal changes of vegetation cover and its driving forces in the Huainan mining area

Environmental Science and Pollution Research - The Huainan mining area is rich in coal resources and has sparse vegetation and many collapsed waterways. Large-scale and long-term underground coal...     

Functional flax fiber with UV-induced switchable wettability for multipurpose oil-water separation

● A PAA-ZnO-HDTMS flax fiber with UV-induced switchable wettability was developed. ● The property of flax fiber could be switched from hydrophobicity to hydrophilicity. ● The mechanism of the acquired UV-induced switchable wettability was discussed. ● The developed flax fiber was successfully used for multipurpose oil-water separation. The large number of oily wastewater discharges and oil spills are bringing about severe threats to environment and human health. Corresponding to this challenge, a functional PAA-ZnO-HDTMS flax fiber with UV-induced switchable wettability was developed for efficient oil-water separation in this study. The developed flax fiber was obtained through PAA grafted polymerization and then ZnO-HDTMS nanocomposite immobilization. The as-prepared PAA-ZnO-HDTMS flax fiber was hydrophobic initially and could be switched to hydrophilic through UV irradiation. Its hydrophobicity could be easily recovered through being stored in dark environment for several days. To optimize the performance of the PAA-ZnO-HDTMS flax fiber, the effects of ZnO and HDTMS concentrations on its switchable wettability were investigated. The optimized PAA-ZnO-HDTMS flax fiber had a large water contact angle (~130°) in air and an extremely small oil contact angle (~0°) underwater initially. After UV treatment, the water contact angle was decreased to 30°, while the underwater oil contact angle was increased to more than 150°. Based on this UV-induced switchable wettability, the developed PAA-ZnO-HDTMS flax fiber was applied to remove oil from immiscible oil-water mixtures and oil-in-water emulsion with great reusability for multiple cycles. Thus, the developed flax fiber could be further fabricated into oil barrier or oil sorbent for oil-water separation, which could be an environmentally-friendly alternative in oil spill response and oily wastewater treatment.     

What are the disease burden and its sensitivity analysis of workers exposing to Staphylococcus aureus bioaerosol during warm and cold periods in a wastewater treatment plant?

Environmental Science and Pollution Research - Biological treatment in wastewater treatment plants releases high amounts of pathogenic bioaerosols. Quantitative microbial risk assessment is a...     

Green pharmaceutical supply chain coordination considering green investment,green logistics,and government intervention

Environmental Science and Pollution Research - Despite their important role in the fight against global climate change, the coordination of green pharmaceutical supply chains (GPSC) has rarely been...     

The role of technology innovation and people’s connectivity in testing environmental Kuznets curve and pollution heaven hypotheses across the Belt and Road host countries: new evidence from Method of Moments Quantile Regression

Environmental Science and Pollution Research - The Belt and Road Initiative (BRI) is closely linked to the ecological sustainability of the infrastructure ventures that intrinsically include the...     

Effect of Environmental Regulation on High-quality Economic Development in China—An Empirical Analysis Based on Dynamic Spatial Durbin Model

Environmental Science and Pollution Research - In 2017, the 19th National Congress of the Communist Party of China put forward the concept of high-quality economic development, indicating that the...     

Progress in quantitative research on the relationship between atmospheric oxidation and air quality

Atmospheric oxidizing capacity (AOC) is an essential driving force of troposphere chemistry and self-cleaning, but the definition of AOC and its quantitative representation remain uncertain. Driven by national demand for air pollution control in recent years, Chinese scholars have carried out studies on theories of atmospheric chemistry and have made considerable progress in AOC research. This paper will give a brief review of these developments. First, AOC indexes were established that represent apparent atmospheric oxidizing ability (AOIe) and potential atmospheric oxidizing ability (AOIp) based on aspects of macrothermodynamics and microdynamics, respectively. A closed study refined the quantitative contributions of heterogeneous chemistry to AOC in Beijing, and these AOC methods were further applied in Beijing-Tianjin-Hebei and key areas across the country. In addition, the detection of ground or vertical profiles for atmospheric OH·, HO₂·, NO₃· radicals and reservoir molecules can now be obtained with domestic instruments in diverse environments. Moreover, laboratory smoke chamber simulations revealed heterogeneous processes involving reactions of O₃ and NO₂, which are typical oxidants in the surface/interface atmosphere, and the evolutionary and budgetary implications of atmospheric oxidants reacting under multispecies, multiphase and multi-interface conditions were obtained. Finally, based on the GRAPES-CUACE adjoint model improved by Chinese scholars, simulations of key substances affecting atmospheric oxidation and secondary organic and inorganic aerosol formation have been optimized. Normalized numerical simulations of AOIe and AOIp were performed, and regional coordination of AOC was adjusted. An optimized plan for controlling O₃ and PM_2.5 was analyzed by scenario simulation.     

50年来上海市台风灾害分析及预评估

依据1949~2005年中国气象局上海台风研究所的实测数据和前人的研究成果,筛选出对上海地区造成严重影响的84个台风,对这84个成灾台风的最大风速、过程雨量以及吴淞口、黄埔公园潮位站数据分析,结合收集到的其中57个台风的完整灾情数据计算灾情指数。综合研究得出:近50年来,成灾台风生成频数的年际变化比较明显;台风造成的人员伤亡、农田受淹面积和房屋倒损3个灾情参数在这50年里有一定的起伏变化,但综合灾情指数变化的幅度不大,从1980年代开始灾情指数有上升趋势。成灾台风灾情指数与上海市郊吕泗站最大风速和过程雨量成正相关。吴淞口、黄埔公园的潮位站数据与成灾台风直接经济损失对应性较好。     

TiO2-PTFE光催化膜的制备及性能

以聚四氟乙烯（PTFE）乳液和纳米TiO2粉末为原料，采用无水乙醇为溶剂，经辊压后与不锈钢网结合，制备了多孔固定化TiO2-PTFE光催化膜。膜性能研究结果表明，m（TiO2）：m（PTFE）=4时，光催化反应处理质量浓度为20mg／L的苯甲酸溶液，2h内TOC去除率高达81．3％。通过扫描电子显微镜观察，TiO2-PTFE光催化膜表面平整，且孔隙分布均匀。TiO2最佳负载量为15mg／cm2。在优化反应条件下同悬浮态TiO2光催化反应体系相比，TiO2-PTFE光催化膜对光源有更高的利用率，表现出更佳的催化活性。