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

Leipeng Cao, Zihan Li, Shuyu Xiang, Zhenghua Huang, R. R Ruan, Yuhuan Liu

Research output: Contribution to journalArticle

Abstract

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 (qm) 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+. 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.

Original languageEnglish (US)
Pages (from-to)448-455
Number of pages8
JournalBioresource Technology
Volume284
DOIs
StatePublished - Jul 1 2019

Fingerprint

Adsorbents
Wastewater
adsorption
Adsorption
wastewater
Bentonite
bentonite
Isotherms
isotherm
rice
Zeolites
Gasification
Specific surface area
zeolite
aqueous solution
surface area
kinetics
Kinetics
experiment
Experiments

Keywords

  • Adsorption model
  • Bentonite
  • Heavy metal
  • Swine wastewater
  • Zeolite

Cite this

Preparation and characteristics of bentonite–zeolite adsorbent and its application in swine wastewater. / Cao, Leipeng; Li, Zihan; Xiang, Shuyu; Huang, Zhenghua; Ruan, R. R; Liu, Yuhuan.

In: Bioresource Technology, Vol. 284, 01.07.2019, p. 448-455.

Research output: Contribution to journalArticle

Cao, Leipeng ; Li, Zihan ; Xiang, Shuyu ; Huang, Zhenghua ; Ruan, R. R ; Liu, Yuhuan. / Preparation and characteristics of bentonite–zeolite adsorbent and its application in swine wastewater. In: Bioresource Technology. 2019 ; Vol. 284. pp. 448-455.
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