环境保护科学2012，Vol.38Issue(5)：36-40,5.
城市污泥中重金属有效态分布特征研究
Study on Chemical Forms Distribution Characteristics of Heavy Metals in Municipal Sewage Sludge
摘要
Abstract
The contents and form distribution characteristics of Cd, Pb, Cu and Zn in sludge were analyzed, taking the surplus sludge of the North Municipal Sewage Treatment Plant in Shenyang as study object. The results showed that the contents of 4 heavy metals in sludge were in accordance with the relevant national standard (GB18918-2002 and CJ248-2007). The chelated forms, neutral exchange forms, acid-soluble forms, alkali-soluble forms and protein- binding forms of heavy metals in sludge were separated and analyzed using eight kinds of extractants ( 0.05 mol/L EDTA, 0.01 mol/L CaCl2, 0.01 mol/L Ca(NO3)2, 0.1 mol/L NaN03, 1 mol/L NH4OAC, 0.43 mol/L HAC, 0.05 mol/L NaHCO, and 0.05 moVL Tris-HCl). The results showed that the higher proportion of chelated forms existed at the level of 5.9%~27.2% in sludge, followed by the acid-soluble forms and neutral exchange forms. The lower ratios of alkali-soluble forms and protein- binding forms were less than 1 % except Cd. The existence forms of Cd and Pb had high activities in sludge, but the stable forms of Cu and Zn existed mainly in the alkaline sludge.关键词
城市污泥/重金属/化学形态Key words
Municipal Sewage Sludge/Heavy Metals/Chemical Forms分类
资源环境引用本文复制引用
铁梅,宋琳琳,惠秀娟,张朝红,景逵,陈忠林,王杰..城市污泥中重金属有效态分布特征研究[J].环境保护科学,2012,38(5):36-40,5.基金项目
辽宁省科技厅项目(No.20102086) （No.20102086）
辽宁大学"211"工程重点学科项目(No.HJ211010) （No.HJ211010）
