Experimental investigations of arsenic adsorption from contaminated water using chemically activated hematite (Fe2O3) iron ore

被引：13

作者：

Memon, Abdul Qayoom ^{[1
]}

Ahmed, Shoaib ^{[1
]}

Bhatti, Zulfiqar Ali ^{[2
]}

Maitlo, Ghulamullah ^{[1
]}

Shah, Abdul Karim ^{[1
]}

Mazari, Shaukat Ali ^{[1
]}

Muhammad, Atta ^{[1
]}

Jatoi, Abdul Sattar ^{[1
]}

Kandhro, Ghulam Abbas ^{[3
]}

机构：

[1] Dawood Univ Engn & Technol, Dept Chem Engn, Karachi, Pakistan

[2] Mehran Univ Engn & Technol, Dept Chem Engn, Jamshoro, Pakistan

[3] Dawood Univ Engn & Technol, Dept Basic Sci Math & Humanities, Karachi, Sindh, Pakistan

来源：

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2021年 / 28卷 / 10期

关键词：

Arsenic; Iron ore; Atomic absorption spectrometer; Isotherms; Kinetics; REMOVAL; NANOPARTICLES; EQUILIBRIUM; ADSORBENTS; KINETICS; COPPER;

D O I：

10.1007/s11356-020-11208-x

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Indigenous hematite iron ore was chemically activated as a function of various hydrogen peroxide concentrations (0.5, 1, 1.5, and 2.0 M), activation time, and iron ore size. Adsorption potential was evaluated at various initial arsenic concentrations, contact time, adsorbent dose, and particle size. Maximum 95% removal efficiency was achieved at 600-mu m size of iron ore, activated with 0.5 M concentration of hydrogen peroxide at 24 h of activation time. The experimental data were further evaluated through Langmuir and Freundlich isotherms. The maximum 14.46 mg/g of adsorption capacity was observed through Langmuir isotherm. Moreover, adsorption kinetics was evaluated using pseudo-first-order and pseudo-second-order kinetics, and the intra-particle diffusion model. The kinetics of arsenic adsorption was best described by using the pseudo-first-order kinetics with a kinetic rate of 0.621 min(-1). The hematite iron ore before and after arsenic adsorption was characterized by XRD, SEM, and EDX.

引用

页码：12898 / 12908

页数：11

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