Spatial spillover effects of urbanization on carbon emissions in the Yangtze River Delta urban agglomeration,China

Environmental Science and Pollution Research - To achieve a win–win situation for both urbanization and carbon emissions reduction from a spatiotemporal perspective, we need to identify the...     

Multiscale analysis of factors affecting food security in China, 1980–2017

Environmental Science and Pollution Research - Food security is an important issue affecting people’s lives and social stability. Clarifying levels of food security and the factors affecting...     

Improvement of water resistance by Fe2O3/TiO2 photoelectrocatalysts for formaldehyde removal: experimental and theoretical investigation

Environmental Science and Pollution Research - TiO2-based photocatalysts are a potential technology for removing indoor formaldehyde (CHOH) owing to their strong photooxidation ability. However,...     

Sustainable and clean utilization of coal gangue: activation and preparation of silicon fertilizer

Journal of Material Cycles and Waste Management - Coal gangue, a by-product produced during the coal processing, has a serious impact on the environment. Using coal gangue as a fertilizer has been...     

Synthesis and Characterization of Dual-ion-Crosslinked Magnetic Sodium Alginate-Based Fe-SA-Y@Fe3O4 Biogel Composite with Ultrastrong Performance for Azo Dye Removal

Journal of Polymers and the Environment - Magnetic sodium alginate(SA)-based biogel composite Fe-SA-Y@Fe3O4 macroparticles were synthesized by co-crosslinking of Y(III) and Fe(III) ions according...     

叙事安全教育材料的初步编制与信效度检验

编制了叙事安全教育的培训材料,并检验了其信效度.培训材料通过双因素被试间设计实验,验证了不同说服方式因素与多媒体类型因素在叙事传输感、情感卷入、临场感、情绪和认知负荷方面的效果差异.可以认为该培训材料能够对被试形成显著差异,其能应用于后续正式研究.     

株洲市臭氧污染状况及相关气象因子分析

采用2013年1～12月空气质量自动监测数据对株洲市臭氧污染现状及相关气象因子进行分析。结果表明:监测期间全年臭氧日最大8 h平均浓度一级标准值达标率达到71.8%,全年超标率为1.6%,超标主要出现在季节变换时期。臭氧日最大8 h平均浓度的月均值变化呈"M"型,浓度高值持续时间长。日变化规律较强,且不同季节变化特征略有差别。臭氧浓度与气温有正相关性,相关系数为0.612;与湿度和云量有负相关性,且臭氧与湿度负相关性较明显,相关系数为0.731。     

铅对人Bel-7402肝癌细胞毒性及EGFP基因DNA甲基化的影响

以体外培养人Bel-7402肝癌细胞为模型,研究铅的3种常见化合物氯化铅(Pb Cl2)、乙酸铅(Pb(CH3COO)2)、硝酸铅(Pb(NO3)2)的细胞毒性和去甲基化表观遗传毒性。应用MTS方法检测细胞的存活率,以前期研究建立的评价方法评价铅化合物的去甲基化表观遗传毒性。结果显示,Pb Cl2、Pb(CH3COO)2、Pb(NO3)2均会抑制Bel-7402细胞的增值,计算求得Pb Cl2、Pb(CH3COO)2、Pb(NO3)2相应的50%细胞存活浓度(IC50)值分别为2 524μmol·L~(-1)、1 977μmol·L~(-1)、1 899μmol·L~(-1);80%细胞存活浓度(IC80)值分别为264μmol·L~(-1)、221μmol·L~(-1)、281μmol·L~(-1),通过对3种染毒物不同染毒浓度的细胞存活率进行随机区组设计的方差分析显示3种化合物间的差异无统计学意义(F=0.11;P=0.897)。去甲基化表观遗传毒性检测结果显示,Pb Cl2、Pb(CH3COO)2、Pb(NO3)2均可观察到明显的去甲基化表观遗传毒性,其相对于5-氮杂-2-脱氧胞苷(5-Aza-Cd R)的去甲基化表观遗传毒性当量分别为2.82E-03、1.50E-03、5.09E-04,三者间也无显著性差异。结果表明,铅化合物会使Bel-7402细胞的细胞存活率和转染进细胞的质粒上增强型绿色荧光蛋白基因启动子的DNA甲基化水平下降。     

基于非本地物种毒性数据推导出的水质基准可为本地物种提供适当保护吗？

基于非本地物种的毒性数据推导出的水质基准一直存在争议,质疑者提出应有针对不同生物区系的水质基准。而这个问题在中国尤为突出。本文作者搜集了38种污染物对本地物种和非本地物种的毒性数据,比较了这些生物的HC₅和物种敏感度分布,结果显示,基于非本地物种推导的水质基准有74%的确定性可以有效保护中国的水生态系统。如果采用评价因子(AF=5)来校正基准,那么可以获得90%的确定性。
精选自Xiaowei Jin, Zijian Wang, Yeyao Wang, Yibing Lv, Kaifeng Rao, Wei Jin, John P. Giesy and Kenneth M. Y. Leung. Do water quality criteria based on nonnative species provide appropriate protection for native species? Environmental Toxicology and Chemistry: Volume 34, Issue 8, pages 1744–1750, August 2015. DOI: 10.1002/etc.2985
详情请见http://onlinelibrary.wiley.com/doi/10.1002/etc.2985/full     

Effects of cotton straw amendment on soil fertility and microbial communities

Maintaining soil fertility, while controlling pollution from excessive chemical fertilizer application is important for keeping soil productivity of sustainable agriculture. Variety of straws have been used and proven to be good soil amendments for increasing soil organic matter (OM) and a range of additional soil nutrients. However, little is known about the utilization of cotton straw for soil amendment. To better understand the mechanism behind cotton straw soil amendments, investigations were performed upon cucumber seedlings, where changes to soil nutrients and microbial communities were investigated. The results revealed that the cotton straw application promoted the cucumber seedling growth by significantly increasing the soil OM, available nitrogen, available phosphorus, and available potassium. The concentration of cotton straw was positively correlated to both the number of the culturable microorganisms and also the total microbial biomass within soil. Furthermore, assessment of cotton straw application using Biolog metabolic profiling and phospholipid fatty acid analysis revealed that such application increased the microbial community metabolic activity, and markedly changed the structure of microbial community. 16S rRNA gene clone library construction and phylogenetic analysis of soil bacteria revealed γ- Proteobacteria sequences dominated the cotton straw amendment soil, comprising 27.8% of the total number of analyzed sequences, while they were less represented in control soil (13.4%). On the contrary, the Sphingobacteria (7.8%) and Verrucomicrobia (2.4%) in the cotton straw amendment soil decreased after application when compared to the control soil 15.2% and 15.2%.