Fulvic acid removal by nanoparticle TiO2 using a submerged membrane photocatalysis reactor

The degradation of fulvic acid（FA） by nanoparticle TiO2 in a submerged membrane photocatalysis（SMPC） reactor was studied. In this reactor, photocatalytic oxidation and membrane separation co-occured. The continuous air supplier provided O2 for the photocatalytical reaction and mixed the solution through an airflow controller. The particle TiO2 could automatically settle due to gravity without particle agglomeration so it could be easily separated by microfiltration（MF） membrane. It was efficient to maintain high flux of membranes. The effects of operational parameters on the photocatalytic oxidation rate of FA were investigated. Results indicated that photocatalyst at 0.5 g/L and airflow at 0.06 m^3/h were the optimum condition for the removal of fulvic acid, the removal efficiency was higher in acid media than that in alkaline media. The effects of different filtration duration on permeate flux rate of MF with P25 powder and with nanoparticle TiO2 were compared. Experimental results indicated that the permeate flux rate of MF was improved and the membrane fouling phenomenon was reduced with the addition of nanoparticle TiO2 catalyst compared with conventional P25 powder. Therefore, this submerged membrane photocatalysis reactor can faciliate potential application of photocatalytic oxidation process in drinking water treatment.     

论我国环境保护公众参与的法律制度

本文从公众参与的法律规定、参与方式、参与程序、监督客体和保障措施等方面阐述了我国环境法中的公众参与具有普遍性、系统性、程序性和约束性。指出公众参与作为一项法律制度已经形成，但环境法和环境管理体系中还有许多急待完善的“公众参与”之处。     

电子废物对环境的污染及管理

本文探讨了电子废物的现状及对环境的污染,研究了国外对电子垃圾的管理经验,并对我国今后在电子废物处理处置方面提出意见.     

光污染在危胁人类的健康

在我们常规的思维中，每谈到环境污染自然会想到灰蒙蒙的天空，流着黑水的河流，工地上机器的轰鸣等—这些容易引起人们重视的大气污染、水污染和噪声污染。而实际上还有另外一种污染也在围绕在我们身边，它曾一度被人们忽略，但绝大多数人们都曾受过它的危害，而且危害正日趋严重。这就是危害人类的光污染。光污染的种类有多种，但主要可分为两大类，即自然光辐射造成的光污染和人为造成的光污染。有关专家指出，这一长期被人们忽视的污染源有可能成为２１世纪直接影响人类身体健康有又一大环境“杀手”。１自然光辐射造成的光污染自然光辐…     

取缔土法炼铅厂

去年5月初,凡口铅锌矿环保处接到群众举报,说是在矿区内南风井和七○六采石场附近两处较偏僻的地方有两个土法炼铅厂,在冶炼过程中,大量地排放含铅量较高的废气,造成污染,     

氯化三丁基锡对锂鱼的急性毒性

氯化三丁基锡（ＴＢＴＣＩ）是一种对鲤鱼（Ｃｙｐｒｉｎｕｓｃａｒｐｉｏ）有剧毒的机锡化合物，急性毒性实验表明：ＴＢＴＣＩ对鲤鱼的９６ｈｒＬｃ５０为３．１５ｐｐｂ；４８ｈｒＬｃ５０４．１３ｐｐｂ。     

汽车运输与环保对策

汽车尾气和噪声造成环境污染，为保护环境，本文对汽车尾气污染和噪声控制提出综合治理的对策。     

Distribution characteristics of ammonia-oxidizing bacteria in the Typha latifolia constructed wetlands using fluorescent in situ hybridization(FISH)

A molecular biology method, fluorescent in situ hybridization（FISH）, in which the pre-treatment was improved in allusion to the media of the constructed wetlands（CW）, e.g. the soil and the grit, was used to investigate the vertical distribution characteristics of ammonia-oxidizing bacteria（AOB） quantity and the relation with oxidation-reduction potential（ORP） in the Typha latifolia constructed wetlands under three different Ioadings in summer from May to September. Results showed that the quantity of the AOB decreased in the Typha latifolia CW with the increase of vertical depth. However, the AOB quantity was 2-4 times the quantity of the control in the root area. Additionally, ORP in the rhizosphere was found to be higher than other areas, which showed that Typha latifolia CW was in an aerobic state in summer when using simulated non-point sewage at the rural area of Taihu Lake in China and small town combined sewage.