Influence of different phosphates on adsorption and leaching of Cu and Zn in red soil

被引:22
|
作者
Li, Zhong-wu [1 ,2 ]
Huang, Bin [1 ,2 ]
Huang, Jin-quan [3 ]
Chen, Gui-qiu [1 ,2 ]
Xiong, Wei-ping [1 ,2 ]
Nie, Xiao-dong [1 ,2 ]
Ma, Wen-ming [1 ,2 ,4 ]
Zeng, Guang-ming [1 ,2 ]
机构
[1] Hunan Univ, Coll Environm Sci & Technol, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China
[3] Yangtze River Sci Res Inst, Dept Soil & Water Conservat, Wuhan 430010, Peoples R China
[4] Southwest Univ Nationalities, Coll Tourism Hist Culture, Chengdu 610041, Peoples R China
基金
中国国家自然科学基金;
关键词
Cu; Zn; phosphate; adsorption; leaching; red soil; LEAD IMMOBILIZATION; ORGANIC-MATTER; HEAVY-METALS; CONTAMINATED SOILS; RISK-ASSESSMENT; ZINC; COPPER; PH; CADMIUM; AVAILABILITY;
D O I
10.1016/S1003-6326(16)64142-0
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Batch and soil column experiments were conducted to evaluate the influence of KH2PO4, (NH4) H2PO4 and Ca(H2PO4)(2) on the adsorption and leaching characteristics of Cu and Zn in red soil. The results show that all the three phosphates can greatly improve the adsorption capacity of red soil for Cu and Zn, and the effect of different phosphates on Cu and Zn adsorption follows the order of Ca(H2PO4)(2) >KH2PO4>(NH4)H2PO4. The addition of phosphate has little effect on the mobility of Cu. Ca(H2PO4)(2) and (NH4)H2PO4 show a strong ability in immobilizing Zn while the immobilization ability of KH2PO4 is much weaker. All the three phosphates are helpful for modifying the partitioning of Cu and Zn from the non-residual phase to the residual phase; however, they could also enhance the contents of Cu and Zn associated with exchangeable and carbonates fractions.
引用
收藏
页码:536 / 543
页数:8
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