2010全国生物材料大会论文集之 (992).pdf

Mobility of Metals Remaining in the Soils Treated
by EDTA Washing or/and Chemical Stabilization
Weihua Zhang, Yuan Yuan, Lizhi Tong, Luwen Zhuang, Zhiyong Liu
Hao Huang Beijing Municipal Engineering & Consulting Corporation,
School of Environmental Science and Engineering, Beijing 100031, China.
Sun Yat-sen University, Guangzhou, China.
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Abstract—This study discusses the feasibility of sequential eutrophication[7]. Their bination of soil
combination of soil washing and chemical stabilization, washing and chemical stabilization appears a plausible
through investigating the metal mobility in the treated soils. method: the washing can separate the sand fractions to
Results indicate that the washing can facilitate to chemically greatly reduce the volume of treated soil, and the EDTA
stabilize metals, if the soil has substantial labile fractions to be solution also removes the liable metals, and therefore greatly
removed by washing. However, if the labile metal fraction is reduce the stabilizing chemicals required in the subsequent
negligible, an opposite effect is often observed. chemical stabilization [8,9]. Nevertheless, it remains unclear
about the contribution of soil washing on the mobility of
Keywords- soil washing, chemical stabilization, metal heavy metals in the soils treated by this sequential
mobility
combin