城市排水系统在水污染防治中的作用

城市排水系统在水污染防治中起着重要作用。通过排水管网、污水处理厂和雨水排放系统的协同作用,能够有效收集和处理废水,减少污水对水环境的污染。同时,雨水管理也能够减少雨水对水环境的污染。水质监测和管理也是城市排水系统的重要组成部分。然而,城市排水系统面临着城市化进程带来的压力和需求、技术和设施的更新和改进以及管理和监管的问题。未来,城市排水系统的发展趋势将会是应用新技术和创新、提高环境意识和政策支持以及借鉴国际经验和合作。     

Removal of a type of endocrine disruptors-di-n-butyl phthalate from water by ozonation

Ozonation of synthetic water containing a type of endocrine disruptor-di-n-butyl phthalate （DBP） was examined. Key impact factors such as pH, temperature, ionic strength, ozone dosage and initial DBP concentration were investigated. In addition, the activities of radicals on uncatalysed and catalysed ozonation were studied. The degradation intermediate products were followed and the kinetic of the ozonation were assessed as well. Results revealed that ozonation of DBP followed two mechanisms. Firstly, the reaction rate of direct ozonation was slower at lower pH, temperature, and ionic strength. Secondly, when these factors were increased for indirect radical reaction, higher percentage of DBP was removed with the increase of the initial ozone dosage and the decrease of the initial DBP concentration. In addition, tea-butanol, humic substances and Fe（Ⅱ） affected DBP ozonation through the radical pathway. It was determined that ozonation was restrained by adding tea-butanol for its radical inhibition effect. Furthermore, humic substances enhanced the reaction to some extent, but a slight negative effect would be encountered if the optimum dosage was exceeded. As a matter of fact, Mn（Ⅱ） affected the ozonation by ＂active sites＂ mechanism. In the experiment, three different kinds of intermediate products were produced during ozonation, but the amount of products for each one of them decreased as pH, temperature, ionic strength and initial ozone dosage increased. A kinetic equation of the reaction between ozone and DBP was obtained.     

Flash技术在水污染控制工程实验教学中的应用

使用Flash技术进行计算机模拟水污染控制工程实验,既能补充在实际操作中难以完成的实验教学内容,又能降低水污染控制工程实验的运行、维护成本,同时也能让环境工程专业的学生更好地了解水污染控制工程实验内部反应机理和工艺过程。本软件对环境工程实验教学相关软件的开发有借鉴作用。     

环太湖地区水污染灾害综合防治能力评价

以水污染灾害为研究对象,从水污染驱动力、污染状态、人类响应3个方面构建水污染灾害综合防治能力评价指标体系,运用物元可拓评价模型,使用熵权法确定权重,计算出环太湖地区的综合关联度并进行分析,结果表明:2014～2018年环太湖地区水污染灾害综合防治能力总体上在不断提升,综合防治能力最好的为无锡,其次为常州、苏州和湖州,嘉...     

实施“以奖促治” 推进重点流域区域海域污染防治——对国家水污染防治“十二五”规划的思考

自2008年7月之后,在农村环境综合整治中实行的以奖促治有力地推动了农村环境保护。而在重点流域区域海域污染防治中能否改变现行的项目补助形式,实施以奖促治的治污资金分配新机制、加快推进重点流域区域海域污染防治工作呢?     

地方传真

北京：计划到今年底实现人均占有绿地50平方米,山东：海洋生态赔偿明确标准,山西：确定水污染防治目标2010年达标率80％以上     

对盐城水污染事件的法律思考

2009年2月20日,因原江苏盐城市标新化工有限公司将生产氯代醚酮的钾盐废水排人到与盐城市区水源地蟒蛇河相通的河流中,使城西、越河两大水厂的水源遭受严重污染,20多万居民饮用水和部分企事业单位供水被迫中断66小时40分钟,造成直接经济损失540多万元,影响恶劣。     

造纸工业水污染现状与治理措施

造纸行业企业数量多、规模差异大、能耗高、水污染物排放量大,应控制造纸工业的水污染,改善环境,进一步减轻造纸行业废水排放对水体的污染.本文分析了制浆、抄纸等工艺产生的污染物,针对具体工艺提出治理方法与措施.