%0 Journal Article
%T The characteristics of heavy metals and PAHs in sewage sludges and their relationships<br>污泥中重金属和多环芳烃(PAHs)的存在特性及其相互关系
%A SUN Feng
%A WENG Huanxin
%A MA Xuewen
%A FU Fengxia
%A <br>孙峰
%A 翁焕新
%A 马学文
%A 傅凤霞
%J 环境科学学报
%D 2008
%I 
%X Polycyclic aromatic hydrocarbons (PAHs) and heavy metals are among the most widespread pollutants found in sewage sludge and impart tremendous potential hazard to human health. Here, we studied the characteristics of PAHs and heavy metals in the sewage sludge from nine different wastewater treatment plants. Zn is the most abundant heavy metal in domestic sewage sludge, followed by Cu, As and Cd. In industrial sewage sludge, the heavy metal profile varies dramatically depending on the source. In tannery sludge, the Cr concentration exceeds 15000 mg·kg-1. The state of heavy metals in sewage sludge varies as well. Cr, Cu and Pb exist predominantly in oxidizable and residual states; Ni and Zn exist mainly in acid soluble and reducible states, whereas Cd can exist in a variety of states. No significant difference in the total content of PAHs was observed between domestic and industrial sewage sludge. The levels of different PAHs follow a pattern of 4 rings > 3 rings > 2 rings > 5 rings > 6 rings. Fuel spills and incomplete combustion of carbon-containing fuels are the major sources of PAHs in sewage sludge. Our results revealed a correlation between heavy metals (e.g. Cd, Ni, and Zn) and low molecular weight PAHs (e.g. 2 or 3-ring PAHs) in sewage sludge. This correlation may be explained by the influence of heavy metals on the bioactivity of microorganisms that are capable of degrading PAHs.
%K sludge
%K heavy metal
%K pollution
%K sewage
%K polycyclic aromatic hydrocarbons<br>污泥
%K 重金属
%K 形态
%K 多环芳烃(PAHs)
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=06E1D65C0DDA7DE33DEC383CF0927BD1&yid=67289AFF6305E306&vid=D3E34374A0D77D7F&iid=59906B3B2830C2C5&sid=2B3D90A54BCBF9B2&eid=F2AC51BC2EE56788&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=3&reference_num=45