Phosphate Removal from Aqueous Solution by an Effective Clay Composite Material

被引：19

作者：

Gao, Ya ^{[1
]}

Chen, Nan ^{[1
]}

Hu, Weiwu ^{[2
]}

Feng, Chuanping ^{[1
]}

Zhang, Baogang ^{[1
]}

Ning, Qian ^{[1
]}

Xu, Bin ^{[1
]}

机构：

[1] China Univ Geosci, Sch Water Resources & Environm, Beijing 100083, Peoples R China

[2] China Univ Geosci, Journal Ctr, Beijing 100083, Peoples R China

来源：

JOURNAL OF SOLUTION CHEMISTRY | 2013年 / 42卷 / 04期

关键词：

Phosphate; Adsorption; Clay composite material; Kinetics; Isotherms; Thermodynamics; ACTIVATED CARBON; WASTE-WATER; PHOSPHORUS REMOVAL; ADSORPTION; EUTROPHICATION; BEHAVIOR; KINETICS; RAW;

D O I：

10.1007/s10953-013-9985-x

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Adsorption is an effective treatment process for removing phosphorus and thus controlling eutrophication. In this study, a clay composite material called Al-dolomite-montmorillonite (Al-DM) was prepared and characterized. Al-DM performed well with respect to phosphate removal, with its performance depending on the Al-DM loading, contact time, initial phosphorus concentration and initial solution pH. Adsorption mechanisms were investigated by conducting batch tests on phosphate adsorption using the Al-DM. The adsorption process fitted both the pseudo-second-order kinetics model and the intra-particle diffusion model. The Langmuir, Freundlich and BET models all adequately described the adsorption isotherm data. Thermodynamic studies showed that the adsorption process was endothermic and spontaneous in nature. Al-DM is an effective adsorbent for phosphate removal mainly due to its hierarchical porous structures as shown by characterization with SEM and EDS. Chemical changes occurring before and after adsorption in a water environment indicated that Al-DM had little negative effect on water quality.

引用

页码：691 / 704

页数：14

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