Removal of Lead Ions from Water by Struvite Natural Zeolite Composite

被引：0
|
作者：
Deng M.-J. [1 ]
Wang X.-J. [1 ]
Cheng X.-J. [1 ]
Jing H.-P. [1 ]
Zhao J.-F. [1 ]
机构：
[1] State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai
来源：
Huanjing Kexue/Environmental Science | 2019年 / 40卷 / 03期
关键词：
Absorb; Lead; Natural zeolite; Struvite;
D O I：
10.13227/j.hjkx.201808098
中图分类号：
学科分类号：
摘要：
A nitrogen and phosphorus recovery product (NZ-MAP) containing struvite was applied to remove heavy metal ions and lead from water. NZ-MAP was characterized using XRD, FTIR, and SEM/EDS. The effects of dosage, initial pH, and reaction time on the removal process were investigated. The results show that the main component of NZ-MAP is a natural zeolite loaded with struvite. When the dosage is 0.4 g•L-1, the maximum adsorption amount is 749.74 mg•g-1, and the adsorption of Pb2+ in the solution increases first and then tends to reach a balance with increase of the pH. Its removal mechanism is mainly Pb10(PO4)6(OH)2 precipitation, and the effect is best when pH is 5.0. The removal process of Pb2+ from water is more in line with the quasi-two stage kinetic model. In an investigation of the effect of coexisting heavy metal ions on the removal of lead ions in water by NZ-MAP, it was found that coexisting Ni2+ and Cu2+ have little effect on NZ-MAP adsorption on Pb2+. Coexisting Zn2+ and Al3+ obviously inhibit the adsorption of Pb2+ by NZ-MAP. The research shows that NZ-MAP material can remove lead ions from water efficiently, thus offering an effective method for doing this. © 2019, Science Press. All right reserved.
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页码：1310 / 1317
页数：7
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