从醇/酮装置酸性废水中回收甲酸

采用共沸—分馏组合法从环己醇和环己酮生产装置产生的酸性废水中回收甲酸,确定了适宜挟带剂的种类及加入量。采用共沸—分馏组合法可获得甲酸质量分数达80%以上的甲酸水溶液,甲酸回收率达70%以上。回收甲酸后,酸性废水的COD由1.0×105~1.6×105m g/L降至500m g/L以下,COD去除率达到99%以上。     

我国电子废物处理问题及解决策略初探

铺天盖地的废旧家电及电子产品正将中国从“世界加工厂”变成“世界垃圾场”,这种困境使得中国的环境和经济可持续发展战略面临极大挑战。本文在对中国电子废物回收、处理存在的问题进行深层分析后,提出通过财政补贴及发行环保彩票等形式筹集资金,将法律、行政手段与经济措施有效结合起来,以期完善中国电子废物回收处理体系,促进经济的可持续发展。     

臭氧分解的动力学和机理概述

本文介绍了催化分解臭氧过程中,臭氧在催化剂表面的吸附形态,及各种条件下的反应下氧催化分解的动力学和机理。     

污水土地处理技术研究的最新进展

本文以地下渗滤系统、慢速渗滤系统为例 ,介绍了污水土地处理技术研究的最新进展 ,指出加速污水土地处理技术产业化的进程必将大大促进我国的环境保护与生态建设工作 ,并带来巨大的环境、经济与社会效益。     

电催化氧化中的三种催化材料处理酸性红B染料的比较研究

本文采用三种不同催化机理的材料———半导体材料TiO2 、软锰矿石和混合稀土进行了电催化氧化 (ECO)染料酸性红B的研究 ,结果表明 ,稀土材料在ECO体系中呈负催化效应 ;软锰矿石的色度去除催化效果明显 ;TiO2 的催化效果最显著 ,其色度和COD去除效果可比无催化剂时效果分别提高60 %和 75% ,可以作为电催化氧化的催化剂。并进一步研究了TiO2 用量对电催化氧化 (ECO)的影响。     

Investigation on solar photocatalytic degradation of various dyes in the presence of Er3+:YAlO3/ZnO–TiO2 composite

In this work, Er³⁺:YAlO₃/ZnO–TiO₂ and ZnO–TiO₂ composites were prepared by the ultrasonic dispersion and liquid boiling method. In succession, they were then characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Acid red B as a model dye compound was degraded under solar light irradiation to evaluate the photocatalytic activities of the Er³⁺:YAlO₃/ZnO–TiO₂ and ZnO–TiO₂ composites. We found that the photocatalytic activity of ZnO–TiO₂ composite can be enhanced by adding an appropriate amount of Er³⁺:YAlO₃. We reviewed influencing factors, such as Er³⁺:YAlO₃ content, heat-treated temperature and heat-treated time on the photocatalytic activity of the Er³⁺:YAlO₃/ZnO–TiO₂ composites. In addition, the effects of solar light irradiation time, dye initial concentration, Er³⁺:YAlO₃/ZnO–TiO₂ amount and solution acidity on the photocatalytic degradation of acid red B dye in aqueous solution were investigated in detail. Simultaneously, the degradation and comparison of other dyes such as methyl orange (MO), rhodamine B (RM-B), azo fuchsine (AF), congo red (CG-R) and methyl blue (MB) were also reviewed. In addition, we attempted to explore both the principle of possible excitation of Er³⁺:YAlO₃/ZnO–TiO₂ under solar light irradiation and the mechanism of photocatalytic degradation.     

Lipophilic organic pollutants induce changes in phospholipid and membrane protein composition leading to Vero cell morphological change

Membrane damage related to morphological change in Vero cells is a sensitive index of the composite biotoxicity of trace lipophilic chemicals. However, judging whether the morphological change in Vero cells happens and its ratio are difficult because it is not a quantitative characteristic. To find biomarkers of cell morphological change for quantitatively representing the ratio of morphological changed cell, the mechanism of cell membrane damage driven by typical lipophilic chemicals, such as trichlorophenol (TCP) and perfluorooctanesulphonate (PFOS), was explored. The ratio of morphologically changed cells generally increased with increased TCP or PFOS concentrations, and the level of four major components of phospholipids varied with concentrations of TCP or PFOS, but only the ratio of phosphatidylcholine (PC)/phosphatidylethanolamine (PE) decreased regularly as TCP or PFOS concentrations increased. Analysis of membrane proteins showed that the level of vimentin in normal cell membranes is high, while it decreases or vanishes after TCP exposure. These variations in phospholipid and membrane protein components may result in membrane leakage and variation in rigid structure, which leads to changes in cell morphology. Therefore, the ratio of PC/PE and amount of vimentin may be potential biomarkers for representing the ratio of morphological changed Vero cell introduced by trace lipophilic compounds, thus their composite bio-toxicity.     

高职院校中“产学合作”运行机制的实施及评价体系的构建

从学校、企业、政策等方面分析了现有“产学合作”运行机制存在的问题，从知识机制、动力机制、调控机制、利益机制、风险机制及环境机制五个角度分析了校企“产学合作”机制发展的现状。以中国环境管理干部学院环境信息管理专业为例，提出了构建合理的“产学合作”评价体系的完整流程，流程中涵盖了评价的重要指标，从不同角度反映了合作的效果。     

Association of sleep problems with urinary concentrations of personal care and consumer product chemicals: a nationally representative,population-based study

Environmental Science and Pollution Research - Sleep problems are common in modern society and may be related to environmental chemicals. The objective of this study is to investigate the...     

Spatial distribution,pollution characteristics,and health risks of antibiotic resistance genes in China: a review

Environmental Chemistry Letters - With the extensive production and use of antibiotics for medicinal and veterinary purposes, antibiotics and genes that code for antibiotic resistance are now...