Preparation and characteristics of bentonite-zeolite adsorbent and its application in swine wastewater

被引：28

作者：

Cao, Leipeng ^{[1
]}

Li, Zihan ^{[1
]}

Xiang, Shuyu ^{[1
]}

Huang, Zhenghua ^{[1
]}

Ruan, Roger ^{[1
,2
,3
]}

Liu, Yuhuan ^{[1
]}

机构：

[1] Nanchang Univ, Engn Res Ctr Biomass Convers, Minist Educ, State Key Lab Food Sci & Technol, Nanchang 330047, Jiangxi, Peoples R China

[2] Univ Minnesota, Ctr Biorefining, Paul, MN 55108 USA

[3] Univ Minnesota, Dept Bioprod & Biosyst Engn, Paul, MN 55108 USA

来源：

BIORESOURCE TECHNOLOGY | 2019年 / 284卷

基金：

中国国家自然科学基金;

关键词：

Bentonite; Zeolite; Adsorption model; Heavy metal; Swine wastewater; METAL ION REMOVAL; HEAVY-METALS; INDUSTRIAL WASTEWATERS; NUTRIENT REMOVAL; AQUEOUS-SOLUTION; ADSORPTION; CLAY; CU2+; ZINC; CD2+;

D O I：

10.1016/j.biortech.2019.03.043

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The preparation of bentonite-zeolite (BZ) adsorbent using bentonite, aluminate, and rice husk was conducted. The adsorption experiment was performed for the removal of Cu2+ and Zn2+ from aqueous solution in single and binary systems. Results showed that gasification of rice husk could effectively improve the specific surface area and pore volume. The optimum pH for Cu2+ and Zn2+ adsorption on BZ was pH 5.0. The pseudo-first order kinetic and Langmuir isotherm model of BZ were the optimal model for Cu2+ and Zn2+. According to Langmuir isotherm model, the maximum adsorption capacity value (q(m)) was 16.39 and 12.72 mg.g(-1) for Cu2+ and Zn2+, respectively. The adsorption affinity order of BZ in the binary solution was Cu2+ > Zn2+center dot NH4+-N concentration over 500 mg.L-1 significantly affected the adsorption capacity of BZ (P < 0.05). The adsorption capacity of BZ for Cu2+ and Zn2+ was higher than that artificial zeolite (AZ) and bentonite in SW.

引用

页码：448 / 455

页数：8

共 36 条

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