【作者】 徐兴华；

【导师】 马义兵；

【作者基本信息】 中国农业科学院 ， 土壤学， 2008， 硕士

【摘要】 近年来,随着城市污水处理率的迅速提高,城市污水处理过程中的副产物污泥的处置及其环境影响受到越来越多的关注。目前,污泥的土地利用成为经济、高效的污泥处置方式之一。但是污泥中的重金属成为污泥土地利用的主要限制因素,因此,我们动态监测了北京市污泥养分和重金属含量,采用盆栽方法研究了污泥中重金属的植物有效性,并研究了大田模式下污泥施用对土壤环境和小麦重金属含量的影响,初步探讨了北京市污泥农用的肥料和环境效应。主要研究结果如下:1.北京市污泥有机质、氮、磷、钾的含量分别为35.5%、2.7%、3.8%、0.2%,总体呈现高有机质、氮、磷,低钾的趋势,并且除了钾含量外,其它都比常规有机肥猪粪、猪厩肥和鸡粪中的含量要高。2.北京市污泥处置厂发酵污泥重金属Zn、Cu、Cr、Pb、Ni、As、Hg的平均含量依次为1665 mg/kg、238 mg/kg、98 mg/kg、79 mg/kg、46 mg/kg、20 mg/kg、13 mg/kg,而北京市污水处理厂生污泥重金属Zn、Cu、Cr、Pb、Ni、As、Hg含量的平均值分别为821 mg/kg、149 mg/kg、31 mg/kg、35 mg/kg、40 mg/kg、21 mg/kg、14 mg/kg;将北京市污泥重金属含量与城镇污泥农用标准(GB18918-2002)的重金属限量值比较发现,除了Hg的含量超出了城镇污泥农用标准pH更多还原

【Abstract】 With the rapid increase of sewage treatment plants, the disposal and the environmental impact of sewage sludge have been paid more and more attention. Now, land application of sewage sludge has become an important way for sewage sludge disposal duo to its lower cost and higher efficiency. But heavy metals are the key factor that affects the land application of sewage sludge. So we have done some researches on the monitoring of nutrient and heavy metal concentration and the phytoavailability of heavy metal in soil treated of sewage sludge by a pot experiment. Also the impacts of soil environmental and heavy metal contents in wheat by land applications of sewage sludge were evaluated to assess the agronomic benefits and environmental impacts of sewage sludge application to soils. The main results obtained were as the following:1. The content of organic matters, nitrogen, phosphorus and potassium in sewage sludge from Beijing is 35.5%, 2.7%, 3.8% and 0.2%, respectively. Except potassium, those are higher than organic fertilizer as pig manure and chicken manure.2. The mean concentrations of Zn, Cu, Cr, Pb, Ni, As and Hg in sewage sludge from sludge disposal plant are 1665 mg/kg, 238 mg/kg, 98 mg/kg, 79 mg/kg, 46 mg/kg, 20 mg/kg and 13 mg/kg, respectively, and are 821 mg/kg, 149 mg/kg, 31 mg/kg, 35 mg/kg, 40 mg/kg, 21 mg/kg, 14 mg/kg respectively from sewage treatment plant. Compared with the heavy metal limits of sewage sludge for land application in china, Zn, Cu, Cr, Pb, Ni and As concentrations in sewage sludge are lower than the limits value, and Hg concentrations in sewage sludge is overran the limits value for pH更多还原