Particle Size Distribution and Speciation Analysis of Heavy Metals in Municipal Solid Waste Incineration Fly Ash in Chongqing, China
The distribution in different particle size of municipal solid waste incinerator fly ash were studied by sieve method, and the heavy metal content and speciation of Pb, Cd, Zn, Cu, Mn, Ni and Cr in different particles were analyzed by Tessiers sequential chemical extraction procedure. The results showed that more than 90% of fly ashs particle size was less than 250 μm, while particles of 150~250 μm accounted for about 50%. Content of heavy metals were decreased first and then increased with decreasing particle sizes except Ni. Concentration of heavy metals in fractions of <250 μm takes up 90% of the total. With the changing of the fractions of fly ash particles, the content of speciation varies from different types of heavy metals. It was also found that the elements such as Zn, Cd, Pb and Cu have exhibited a remarkable content in the form of exchangeable cations. They would be released into the environment under acid rains especially in Chongqing, which would result in a potential risk to the environment.
Qingju Hao Changsheng Jiang Junke Zhang Qiwen Tang
College of Resources and Environment, Southwest University Chongqing 400716, China Chongqing Key Lab College of Resources and Environment, Southwest University Chongqing 400716, China
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）