印染废水对3种水生生物的毒性作用  

Toxicity of Printing-Dyeing Wastewater to Aquatic Organisms

作　　者：原居林[1] 胡大雁 杨卫明 练青平[1] 朱俊杰[1] 顾志敏[1] 

机构地区：[1]浙江省淡水水产研究所,浙江湖州313001 [2]湖州市水产技术推广站,浙江湖州313001 [3]海盐县水产技术推广站,浙江海盐313001

出　　处：《生态与农村环境学报》2012年第2期209-212,共4页Journal of Ecology and Rural Environment

基　　金：国家重点基础研究发展计划(2008CB418000);湖州市科技攻关项目(2010GN02)

摘　　要：为合理评估印染废水对水环境造成的影响,以斜生栅藻(Scenedesmus obliquus)、大型溞(Daphnia magna)和太湖花(Hemibarbus maculates)为受试生物,印染废水分别用标准稀释液7346-2按照几何级数稀释成为100.00%、50.00%、25.00%、12.50%和6.25%的系列试验液,研究印染废水对3种水生生物的毒性效应。结果表明,印染废水对水生态系统中不同营养层次的3种生物均有一定的毒性,对斜生栅藻24、48 h的半数生长抑制浓度(EC50)分别为(51.55±4.12)%、(20.40±6.27)%,对大型溞24、48 h的EC50分别为(78.20±4.31)%、(53.10±1.88)%,对花卵裂期胚胎、囊胚期胚胎、原肠期胚胎、初孵仔鱼和25日龄仔鱼96 h的半数致死浓度(LC50)分别为(19.89±1.68)%、(25.95±2.14)%、(27.24±0.88)%、(19.61±2.21)%和(49.27±3.27)%。研究得出印染废水对水生生物的安全浓度为1.96%,生产中应严格控制其排放。To evaluate impact of printing-dyeing wastewater on aquatic ecological systems, an experiment was carded out using Scenedesmus obliquus, Daphnia magna and Hemibarbus maculates as subjects for test of toxicity of printing-dyeing wastewater. In the experiment the wastewater was diluted with 7346 - 2 standard diluent into solutions different in concentration, i. e 100. 00%, 50.00%, 25.00% , 12. 50% , and 6. 25%. Results show that the wastewater was somewhat toxic to all the three kinds of aquatic orgarlisms in the aquatic ecosystem regardless of its nutrient level. The 24 and 48 h-EC50 （effective concentration for reduction of growth by 50% ） of the wastewater was （51.55 ±4. 12 ）% and （20.40 ± 6. 27）%, respectively, to S. obliquus, and （78. 20 ±4. 31）% and （53.10 ± 1.88）%, respectively, to D. magna. The 96h-LC50 of the wastewater to cleavage stage, blastula stage, gastrula stage, lava, and 25-day fingerlings of H. modulates was （ 19. 89 ± 1.68 ） %, （25.95 ± 2. 14） %, （27.24 ± 0. 88） %, （ 19. 61 ± 2. 21 ） %, and （49. 27 ± 3.27 ） %, respectively. The safe concentration of the wastewater to aquatic organisms was 1.96%. So, discharge of such wastewater should be strictly controlled in practice.

关 键 词：印染废水 斜生栅藻 大型溞 太湖花鲔 毒性 

分 类 号：X503.2[环境科学与工程—环境工程]