EFFECTS OF DIFFERENT PASSIVATING MATERIAL TREATMENTS ON MORPHOLOGICAL CHANGES OF HEAVY METALS BEFORE AND AFTER COMPOSTING
文献类型： 外文期刊
作者： Cui, Xinwei 1 ; Gao, Peng 1 ; Lu, Hongling 1 ; Lu, Yaoxiong 1 ; Peng, Fuyuan 1 ;
作者机构： 1.Hunan Acad Agr Sci, Inst Agroenvironm & Ecol, Changsha 410125, Hunan, Peoples R China
关键词： Composting; heavy metals; passivation; manure; garden litter; sludge
期刊名称：FRESENIUS ENVIRONMENTAL BULLETIN （ 影响因子：0.489； 五年影响因子：0.479 ）
ISSN： 1018-4619
年卷期： 2019 年 28 卷 11A 期
页码：
收录情况： SCI
摘要： This study explores the effects of different passivating materials on the immobilization of Cu, As, Zn, Cd and Pb in cocontaminated waste composting. The multimaterial composting experiment was conducted by mixing pig manure, chicken manure, garden litter and urban sludge at a ratio of 20:55:10:15 (W/W) to investigate the effects of adding superphosphate, calcium carbonate or their combination on the forms of heavy metals before and after composting. The results reveal that adding passivating materials immobilized Cu, Zn, Cd, Pb differently and activated As. Among the passivating materials, superphosphate considerably reduced the contents of the exchangeable Cu, Pb, Cd and Zn, and the relevant passivating effects were 58.61%, 46.95%, 46.20% and 19.23%, respectively. However, adding superphosphate scarcely mobilized As (0.90%) compared with other passivating treatments (8.41-19.64%). This study suggests that adding superphosphate could have many positive effects on heavy metal passivation in multimetal cocontaminated waste composting.
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