Adsorption of phosphates using transition metals-modified bentonite clay

被引：25

作者：

Mdlalose, Lindani ^{[1
,2
]}

Balogun, Mohammed ^{[1
]}

Setshedi, Katlego ^{[1
]}

Chimuka, Luke ^{[2
]}

Chetty, Avashnee ^{[1
]}

机构：

[1] CSIR, Polymers & Composites Mat Sci & Mfg, POB 395, ZA-0001 Pretoria, South Africa

[2] Univ Witwatersrand, Sch Chem, Mol Sci Inst, P Bag 3, ZA-2050 Johannesburg, South Africa

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2019年 / 54卷 / 15期

关键词：

Modified bentonite; phosphate; ligand exchange process; adsorption mechanism; BIOLOGICAL PHOSPHORUS REMOVAL; ACID-ACTIVATED BENTONITE; AQUEOUS-SOLUTION; WATER; EQUILIBRIUM; EFFICIENT; RECOVERY; BEADS; IRON;

D O I：

10.1080/01496395.2018.1547315

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Phosphorus is a micronutrient but when it exists in abundance, it can have detrimental environmental impact. Bentonite (Bent) modified with Fe, Co and Ni salts were synthesized and evaluated for adsorption of phosphate ions from water. Results indicated that metal-modified bentonite have lower crystallinity compared to the native bentonite. Batch adsorption experiments showed maximum adsorption capacities of 20.88, 46.95, 29.07 and 6.57 mg/g for Fe-Bent, Co-Bent, Ni-Bent and Bent, respectively. The pseudo-second-order kinetic model provided a better fit for all adsorbents. The competition effect of coexisting anions were not significant for Fe and Ni modified bentonite.

引用

页码：2397 / 2408

页数：12

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