Preparation of a new sorbent with hydrated lime and blast furnace slag for phosphorus removal from aqueous solution

被引:69
|
作者
Gong, Guozhuo [1 ,2 ]
Ye, Shufeng [1 ]
Tian, Yajun [1 ]
Wang, Qi [3 ]
Ni, Jiandi [1 ,2 ]
Chen, Yunfa [1 ]
机构
[1] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100080, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
[3] Xian Univ Architecture & Technol, Sch Met Engn, Xian 710055, Peoples R China
基金
美国国家科学基金会;
关键词
Phosphate removal; Blast furnace slag; Hydrated lime; CA(OH)(2)/FLY ASH SORBENTS; PHOSPHATE REMOVAL; WASTE-WATER; FLY-ASH; ADSORPTION; IONS;
D O I
10.1016/j.jhazmat.2008.11.077
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The removal of dissolvable inorganic phosphate (H2PO4-) by sorbents prepared from hydrated lime (HL) and blast furnace slag (BFS) was fundamentally studied by an orthogonal experiment design. Based on statistic analysis, it is revealed that the weight ratio of BFS/HL is the most significant variable, and an optimized preparation condition is figured out. With the increase of HL content, the adsorption capacity increases, suggesting that the HL plays the important role in the removal process in the gross. However, in the lower HL content, it is interesting that the adsorption capacity of as-prepared sorbents exceed the sum of the capacities of the same ratio of BFS and HL The further analysis indicate the excess capacities linearly depend on the specific surface area of sorbents, suggesting that the removal of H2PO4- is closely related with the microstructure of sorbents in the lower HL content, according to the characterization with SEM, XRD and pore analysis. Additionally, an adsorption model and kinetic are discussed in this paper. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:714 / 719
页数:6
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