Deriving freshwater quality criteria for 2,4,6-trichlorophenol for protection of aquatic life in China

Freshwater quality criteria of 2,4,6-trichlorophenol (2,4,6-TCP) were developed with particular reference to the aquatic biota in China, and based on USEPA's guidelines. Acute toxicity tests were performed on nine different domestic species indigenous to China to determine 48 h LC(50) and 96 h LC(50) values for 2,4,6-TCP. In addition, 21 d survival-reproduction test with Daphnia magna, 30 d embryo-larval test with Carassius auratus, 60 d fry-juvenile test with Ctenopharyngodon idellus, 30 d early life stage test with Bufo bufo gargarizans and 96 h growth inhibition test with Scenedesmus obliqaus were also conducted to estimate lower chronic limit and upper chronic limit values. The final acute value (FAV) was 2.01 mg/l 2,4,6-TCP. Acute-to-chronic ratios ranged from 5.01 to 12.2. The final chronic value (FCV) and the final plant value (FPV) of 2,4,6-TCP were 0.226 and 2.24 mg/l respectively. Based on FAV, FCV and FPV for 2,4,6-TCP, a criteria maximum concentration of 1.01 mg/l and a criterion continuous concentration of 0.226 mg/l were derived. The results of this study provide useful data for deriving national or local water quality criteria for 2,4,6-TCP based on aquatic biota in China.     

Relationship between bioaccumulation, distribution of METand lipid content of aquatic organisms

Ｒｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎｂｉｏａｃｃｕｍｕｌａｔｉｏｎ，ｄｉｓｔｒｉｂｕｔｉｏｎｏｆＭＥＴａｎｄｌｉｐｉｄｃｏｎｔｅｎｔｏｆａｑｕａｔｉｃｏｒｇａｎｉｓｍｓＬｉｕＺｈｅｎｇｔａｏ；ＺｈｏｕＦｅｎｇｆａｎ；ＪｉｎＨｏｎｇｊｕｎ（Ｄｅｐａｒ...     

城市垃圾处理技术及应用前景

城市垃圾的处理是一个世界性问题。本文论述了城市垃圾埋、堆肥、焚烧三种处理技术的利用现状及不足之处，提出了综合处理的发展方向；批出垃圾分选是综合处理的关键技术，并介绍了垃圾的气流分选设备，介绍了国外垃圾分选综合处理的方法；提出了适用我国国情的简易综合处理技术及应用前景。     

新毒性试验生物萼花臂尾轮虫的特性试验

研究了萼花臂尾轮虫Ｂｒａｃｈｉｏｎｕｓ ｃａｌｙｃｉｆｌｏｒｕｓ ２４ｈ标准化急性毒性试验的可行性和优越性。应用轮虫休眠卵，在２５℃、３０００ｌｘ的强光照下进行孵化，吸取孵化后３ｈ内的幼体，进行２４ｈ（暗相）急性毒性试验。研究表明，Ｃｕ、Ｈｇ、ＮａＰＣＰ、ＳＤＳ、Ｃｄ、Ｚｎ、Ｎｉ、ＮＨ３对Ｂ．ｃａｌｙｃｉｆｌｏｒｕｓ的２４ｈ ＬＣ５０值分别为０．０２２、０．０４３、１．３０、１．４７、１．７７、１     

江苏省环境与社会经济发展协调性分析研究

利用1991年-2010年江苏省主要社会经济、污染物排放和环境质量数据,通过构建环境与社会经济评价指标体系和协调发展度评价模型,对全省不同发展时期环境与社会经济发展协调程度进行定量分析和系统评价.结果表明,20年来,江苏省环境与社会经济协调发展度基本呈现较为平缓的上升趋势,由不协调逐步向比较协调阶段转变,在不同的发展时期,受不同的环境与社会经济发展状况影响,协调发展度指数相应地发生波动变化.但近些年环境与社会经济发展协调性存在下降风险,还需进一步采取有效措施,促进二者协调、可持续发展.     

长江口南北支浮游动物群落生态学研究

长江口特殊的生态环境使得浮游动物的种类组成、密度和时空分布等生态特征有别于其它水体。2005年秋季(丰水期)和2006年春季(枯水期)对长江口南北支浮游动物进行了2个航次的调查,沿南北支由西向东设立3个采样断面共20个采样点。共采集到浮游动物227种,其中轮虫65种,原生动物107种,枝角类15种,桡足类40种。优势种包括龟甲轮虫(Keratella)、刺簇多肢轮虫(Polyarthra trigla)、萼花臂尾轮虫(Brachionus calyciflorus)、砂壳虫(Difflugia)、表壳虫(Arcella)、砂壳纤毛虫(Tintinnid)、中华哲水蚤(Calanus sinicus)、汤匙华哲水蚤(Sinocalanus dorrii)、广布中剑水蚤(Mesocyclops leuckarti)、象鼻溞(Bosmina)等。文章对南北两支浮游动物的种类组成和结构进行了比较,南支浮游动物的种类、数量及生物多样都高于北支,南北两支的浮游动物群落相似度很低。南北两支水域环境的不同造成其浮游动物群落结构的较大差异,文章分析了环境因子与浮游动物群落结构的相关性,其中水温是重要的影响因素,水温的季节性决定...     

环境法制建设中的科学精神与人文关怀

我国的环境法制建设现状不容乐观。搞好环境法制建设必须提高广大公众特别是环境法制工作者的科学精神,加强环境法制的人文关怀。贯穿科学精神和充满人文关怀的环境法才能成为保护环境资源的有效规范力量。     

环保政府网站建设现状及发展探讨

环保政府网站是环保电子政务的重要组成部分,在环保部门实施政务公开、宣传环境保护、服务社会公众方面正发挥越来越重要的作用。在对中国环保政府网站建设现状进行分析的基础上,对进一步加强环保网站建设、提高网站的服务效能提出对策建议。     

“十一五”江苏省地面水域水质污染特征分析

对"十一五"江苏省地面水域水质状况及时空分布特征进行了全面分析,结果表明,"十一五"期间,江苏省地表水水质总体处于轻度污染状态,河流水质呈现较为明显的有机污染特征,影响水质的主要污染物为石油类、氨氮、五日生化需氧量等;主要湖库氮、磷污染较为突出,湖库富营养化问题尚未得到有效控制。水质污染总体表现为枯水期>平水期>丰水期。受社会经济发展影响,地表水质呈现一定的区域流域差异,经济较发达地区水质污染也相对较重。总体来看,"十一五"期间由于加大了产业结构调整与污染防治力度,江苏省地面水域水质污染状况有所改善。     

Inhibition and recovery of nitrification in treating real coal gasification wastewater with moving bed biofilm reactor

Moving bed biofilm reactor (MBBR) was used to treat real coal gasification wastewater. Nitrification of the MBBR was inhibited almost completely during start-up period. Sudden increase of influent total NH3 concentration was the main factor inducing nitrification inhibition. Increasing DO concentration in the bulk liquid (from 2 to 3 mg/L) had little e ect on nitrification recovery. Nitrification of the MBBR recovered partially by the addition of nitrifying sludge into the reactor and almost ceased within 5 days. Nitrification ratio of the MBBR achieved 65% within 12 days by increasing dilute ratio of the influent wastewater with tap water. The ratio of nitrification decreased to 25% when influent COD concentration increased from 650 to 1000 mg/L after nitrification recovery and recovered 70% for another 4 days.