污泥农用的重金属安全性试验研究  

Research on Safety of Heavy Metals in Sludge during Agricultural Utilization

作　　者：张学洪[1] 陈志强[1] 吕炳南[1] 陈文兵[1] 解庆林[2] 王敦球[2] 李金城[2] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]桂林工学院资源环境系,广西桂林541004

出　　处：《中国给水排水》2000年第12期18-21,共4页China Water & Wastewater

基　　金：广西壮族自治区科技厅资助项目! (桂科新 98170 88)

摘　　要：为确定城市污水的污泥农用过程中是否存在重金属毒害 ,系统研究了桂林城市污水的污泥中重金属特征和使用污泥肥料后农产品中的重金属含量。研究表明 :①桂林城市污水的污泥中重金属含量较我国其他城市略低 ;②EDTA提取污泥时 ,重金属的提取率在 2 3%～ 6 0 % ,这部分重金属有可能被植物吸收 ;③污泥有机复合肥肥效显著。施用污泥复合肥与施用其他肥料相比较 ,稻谷和稻茎中的重金属含量无明显差异 。In order to determine the potential toxicity of heavy metals in municipal wastewater sludge during agricultural utilization, the feature of heavy metal in the wastewater sludge in Guilin city and the heavy metal contents of agricultural products after sludge fertilizer application are systematically studied. The results showed that: (1) the heavy metal contents of the sludge in Guilin are slightly lower than in other cities in China. (2) The extraction rate of heavy metals ranges from 23% to 60% when the sludge is extracted by 0.1 mol of EDTA, i.e. 23%～60% of metals maybe absorbed by plants. (3) The fertilizer effect of sludge is good. There is no obvious difference of heavy metal contents in rice and rice straw between using sludge-organic-complex-fertilizer and other fertilizer sold in market, and the heavy metal in agricultural product accords with the national standard.

关 键 词：污泥 农业利用 重金属 安全性试验 

分 类 号：X703[环境科学与工程—环境工程]