污泥放置时间对其浸提液毒性的影响  

Effects of Sewage Sludge Storage on the Toxicity of its Extracts

作　　者：崔玉霞[1] 尚惠华[1] 金洪钧[1] 于红霞[1] 冯建昉[1] 

机构地区：[1]南京大学环境学院污染控制与资源化研究国家重点实验室,南京210093

出　　处：《南京大学学报（自然科学版）》2001年第6期713-718,共6页Journal of Nanjing University（Natural Science）

基　　金：江苏省自然科学基金 (BK992 0 5 )

摘　　要：以接纳工业废水的城市综合污水处理厂污泥的水浸提液对Daphniamagna的 2 4h急性毒性为指标 ,研究了该厂在不同季节运行时的污泥 ,放置时间对其浸提毒性的影响 .结果表明 ,无论是春季还是冬季 ,污泥浸提液对Daphniamagna的急性毒性随放置时间增长 ,总体呈上升趋势 .污泥放置 1～ 2个月后毒性趋于稳定 .利用毒性鉴别评价程序 ,对不同放置时间 (1d、8d和 6 4d)的污泥的浸提液 ,进行了毒性原因鉴别 .结果表明 ,污泥放置时间越长 ,有毒重金属含量越高 .GC/MS分析表明 ,放置 1d和 8d的污泥的浸提液中 ,有机毒物主要是含苯环的化合物 ,如各种取代苯胺、芳香酸生成的盐或酯以及甲基酚等 ,放置 6 4d的污泥的浸提液中 ,有机毒物主要是含氮氧的杂环物质和小分子脂肪酸 .另外 。Agricultural application of sewage sludge is getting more and more popular in the world in recent years. But organic pollutants and heavy metals widely exist in most of the sludge, which is harmful to the ecosystem and limits the agricultural utilization of the sludge. The 24?h acute toxicity of the water extracts of municipal sewage sludge to Daphnia magna and the relation between the toxicity and the storage duration of the sludge are studied. The longer the storage duration of the sewage sludge is, the higher the acute toxicity is. But the toxicity increases slightly after one or two month storage. In order to explore the relation between the toxicants in the extracts and the storage duration, the characteristics of toxicants existing in the extracts for different storage duration (1?d, 8?d and 64?d) are tested by using toxicity identification evaluation (TIE) procedures. During the storage of the sewage sludge, more and more toxic heavy metal irons come into the extracts. And GC/MS analysis indicates organic toxicants in the extracts of 1?d and 8?d sludge are mainly aromatic compounds such as benzenamine, phenol 4-methyl, and so on, while toxicants in extracts of 64?d sludge include 1-methyl-2-pyrrolidinone, piperidinone and 5,6,7,7a-tetrahydro-4,4,7a-trimethyl-2-benzofuranone etc. The possible reasons for the increase of the sludge toxicity are also discussed.

关 键 词：城市污水污泥 急性毒性 放置时间 毒性鉴别评价 浸提液 污水处理 有毒重金属含量 

分 类 号：X703[环境科学与工程—环境工程]