CdS and Ag synergistically improved the performance of g-C3N4 on visible-light photocatalytic degradation of pollution

Environmental Science and Pollution Research - CdS-AgO@g-C3N4 nanocomposites were successfully synthesized and characterized by XRD, N2 physical adsorption, XPS, SEM, TEM, EDX, and UV–Vis DRS...     

Fluoride contamination,spatial variation,and health risk assessment of groundwater using GIS: a high-density survey sampling in Weifang City,North China

Environmental Science and Pollution Research - The present study, with the aid of GIS, utilizes high-density groundwater (GW) sampling data (1398 samples) to analyze the spatial variation...     

Monitoring and evaluation of antibiotic resistance genes in three rivers in northeast China

Environmental Science and Pollution Research - Antibiotic resistance genes (ARGs) have become an important public health problem. In this study, we used metagenomic sequencing to analyze the...     

How can green building development promote carbon emission reduction efficiency of the construction industry?——Based on the dual perspective of industry and space

Environmental Science and Pollution Research - Green building development(GBD) plays an important role in improving carbon emission reduction efficiency of the construction industry(CEEOCI), and...     

Generation estimation and material flow analysis of retired mobile phones in China

The generation estimation of retired mobile phones is launched with the sales and new method using the revised sales data and amount of the subscribers. Several assumptions have been made due to the insufficient sources of the data. The sales data of legal mobile phones are calculated with the authoritative and continuous official data. The sales data of smuggled and counterfeit mobile phones in China are also estimated based on the behavior data collected from the questionnaires. The results of generation estimation show that there are 636.52 million mobile phones retired in 2020, compared with 14.44 million in 1999 and several negative values in 2000, 2001, and 2008. The annual total mass of retired mobile phones in China escalated with the contributions of both the increasing generation amount and constant mass of the single unit. There are 50,921.60 ton of mobile phones retired in 2020 compared with 1155.20 ton in 1999, while the peak is 58,131.20 ton in 2019. There are 26,066.80 ton of retired mobile phones are stockpiled in 2020, while 16,152.40 ton and 8702.40 ton of retired mobile phones are reused as a whole unit and recycled, respectively. In the retired mobile phones that are recycled, 4600.50 ton material is recovered and 1216.50 ton components are reused, while 2885.40 ton residues need final disposal. The amount and dynamic characteristics of metals in the retired mobile phones are also calculated. Based on the results, several policy implications are made to improve sustainable management system of retired mobile phones in China.

     

Does more voluntary environmental information disclosure cut down the cost of equity: heavy pollution industries in China

Environmental Science and Pollution Research - Examining the coexisting policies for mandatory and voluntary disclosure of environmental information, this paper focuses on the unique background for...     

“微信”在应急响应中的作用——2016年“阜宁龙卷风”案例研究

为研究“微信”在应急响应中的作用,本文以“阜宁龙卷风”事件为研究对象,通过田野调查收集第一手资料进行分析,研究结果显示:应急响应中“微信群”是信息传递的主要方式;“微信”的主要功能是信息扩散、社会动员和协调指挥;应用中“微信”暴露出的信息零碎、信息流动过于频繁、信息质量参差不齐的缺陷可以通过综合运用多种信息通道、多种信息驱动的交叉校验、加强“微信群”自我管理的方式进行弥补。通过与西方制度情境中的研究发现进行对比,为我国的应急响应中“微信”的应用提供启示,同时提出后续研究的方向。     

季铵盐离子液体改性活性炭及其热安全性研究*

为进一步提高活性炭对VOCs的吸附性能和热安全性,采用铵盐类离子液体改性原始活性炭,优化其理化性质。结果表明:改性活性炭表面生成新的无机盐化合物,C=O、-OH、C-O、-COOH和C-S基团增加;孔隙结构增多且分布均匀,比表面积及微孔体积增大;改性后活性炭对甲苯的吸附量提高3.14倍,吸附效率明显提升;在固定碳的燃烧阶段,改性活性炭活化能为54.44 kJ·mol-1,是改性前活性炭的1.38倍,活化能增大,物质稳定性增强;当粒径为120~150目及200目以上时,改性前后活性炭的自燃温度分别从328.4 ℃、319.3 ℃增长至355.1 ℃、345.7 ℃。因此,负载季铵盐离子液体可有效提高活性炭吸附性能和热安全性,研究结果可为优化VOCs处理工艺提供参考。