Protective effects of melatonin and vitamin E in acetamiprid-induced nephrotoxicity

Environmental Science and Pollution Research - Investigation of probable toxic effects of acetamiprid (ACMP) on kidney and comparative analysis of the probable protective effects of vitamin E and...     

A comparative investigation of NdSrCu_(1-x) Co_x O_(4-δ) and Sm_(1.8) Ce_(0.2) Cu_(1-x) Co_x O_(4-δ) (x:0–0.4) for NO decomposition

A series of single-phase T-structured NdSrCu 1-x Co x O 4-δ with oxygen vacancies and T -structured Sm 1.8 Ce 0.2 Cu 1-x Co x O 4-δ (x: 0–0.4) with oxygen excess were prepared using ultrasound-assisted citric acid complexing method, and characterized by means of techniques such as thermogravimetric analysis and NO temperature-programmed desorption (NO-TPD). The catalytic activities of these materials were evaluated for the decomposition of NO. It was found that the NdSrCu 1-x Co x O 4-δ catalysts were of oxygen vacancies whereas the Sm 1.8 Ce 0.2 Cu 1-x Co x O 4-δ ones possessed excessive oxygen (i.e., over-stoichiometric oxygen); with a rise in Co doping level, the oxygen vacancy density of NdSrCu 1-x Co x O 4-δ decreased while the over-stoichiometric oxygen amount of Sm 1.8 Ce 0.2 Cu 1-x Co x O 4-δ increased. The NO-TPD results revealed that NO could be activated much easier over the oxygen-deficient perovskite-like oxides than over the oxygen-excessive perovskite-like oxides, with the NdSrCuO 3.702 catalyst showing the best efficiency in activating NO molecules. Under the conditions of 1.0% NO/helium, 2800 hr -1 , and 600–900°C, the catalytic activity of NO decomposition followed the order of NdSrCuO 3.702 NdSrCu 0.8 Co 0.2 O 3.736 NdSrCu 0.6 Co 0.4 O 3.789 Sm 1.8 Ce 0.2 Cu 0.6 Co 0.4 O 4.187 Sm 1.8 Ce 0.2 Cu 0.8 Co 0.2 O 4.104 Sm 1.8 Ce 0.2 CuO 4.045 , in concord with the sequence of decreasing oxygen vacancy or oxygen excess density. Based on the results, we concluded that the higher oxygen vacancy density and the stronger Cu 3+ /Cu 2+ redox ability of NdSrCu 1-x Co x O 4-δ account for the easier activation of NO and consequently improve the catalytic activity of NO decomposition over the catalysts.     

房地产开发项目环境影响评价内容的探讨

根据房地产开发项目的特点,阐述了房地产开发项目类型、工程概况和施工期、运行期分别对环境产生的不良影响,着重分析施工期扬尘、运行期废水污染情况,以及减绶该不利影响的措施,最后总结房地产开发项目环境影响评价还须进一步探讨的问题。     

四丰山水库污染现状及防治对策

佳木斯四丰山水库是以防洪为主,结合灌溉、养鱼等综合利用水库。近些年随着周边的度假村的开发以及农田施肥量的增加,造成四丰山水库污染日益严重,通过对近些年数据的分析,对污染状况进行分析,找出原因,提出防治对策。     

渗滤系统处理北方城市生活污水微生物数量变化的研究

本文应用粉煤灰渗滤系统处理北方寒冷地区城市污水,结果细菌数量去除率在89.6%—99.9%之间,粪大肠菌群数量去除率在90%—99.9%之间,此方法成本低、效果好,适合北方中小城镇污水处理。     

浅议环境保护专项资金效益审计的重点和方法

重点论述了从征、管、用三大环节对环保专项资金进行效益审计。论述了审计方法,提出了存在的问题和建议。     

浅谈焦化废水的处理

焦化废水是一种典型的含难降解有机污染物的工业废水,除含酚类化合物外,还含有多种芳香烃和杂环类有机物,成分复杂,水量大,对环境污染严重。因此,焦化废水的处理越来越多的受到相关学者及专家的重视。本文首先从焦化废水的来源及特征出发,根据其特殊性,综合阐述了近年来国内外焦化废水的常规处理方法及深度处理方法,为以后焦化废水的处理提供一些思路。     

HP-5毛细管柱气相色谱法分离水中滴滴涕色谱条件研究

本试验利用HP-5毛细管柱,气相色谱法对水中滴滴涕几种衍生体的分离条件进行了研究和优化,找到了最佳仪器条件,为水中滴滴涕的检测提供了一定的试验参考。     

糖厂废醪农用可行性分析

糖厂废醪废水治理一直是国内制糖业不惜花费较大人力、物力要解决的问题。由于以前技术所限,未得到很好治理或综合利用。本文根据废弃废醪池中废醪液和废醪淤泥有机质和N、P等元素含量较高特点,建议采取有效方式用于农田施肥,既可治理污染,又可对改良农田起到积极的促进作用。     

自动监控技术在环境监测中的应用

介绍了自动控制技术、在线监测技术以及现代信息和多媒体技术在环境监测工作中的应用,并阐述了自动监控技术在环境监测中应用价值及存在的困难。