Preparation, Performances and Mechanisms of Co@AC Composite for Herbicide Atrazine Removal in Water

Yongpan Liu; Danxia Liu; Huijun He; Jinxiao Zhang; Jie Liu; Dunqiu Wang; Liangliang Huang; Zhihong Tu

doi:10.3390/w13020240

Water (Jan 2021)

Preparation, Performances and Mechanisms of Co@AC Composite for Herbicide Atrazine Removal in Water

Yongpan Liu,
Danxia Liu,
Huijun He,
Jinxiao Zhang,
Jie Liu,
Dunqiu Wang,
Liangliang Huang,
Zhihong Tu

Affiliations

Yongpan Liu: College of Environmental Science and Engineering, and Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
Danxia Liu: College of Environmental Science and Engineering, and Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
Huijun He: College of Environmental Science and Engineering, and Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
Jinxiao Zhang: College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
Jie Liu: College of Environmental Science and Engineering, and Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
Dunqiu Wang: College of Environmental Science and Engineering, and Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
Liangliang Huang: College of Environmental Science and Engineering, and Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
Zhihong Tu: College of Environmental Science and Engineering, and Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China

DOI: https://doi.org/10.3390/w13020240
Journal volume & issue: Vol. 13, no. 2
p. 240

Abstract

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In this study, a high-performance adsorbent Co@AC was prepared by loading cobalt ions (Co2+) on activated carbon (AC) via solution impregnation and high-temperature calcination technology, and was used to remove atrazine in water. The preparation factors on the adsorbent properties were studied, and the characteristics were analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and Fourier transform infrared spectrometer (FTIR). The results showed that Co@AC possessed the best performance when the factors were 7.0% of Co2+ (w/v), 7.0 h of immersing time, 500 °C of calcination temperature and 4.0 h of calcination time. The adsorption conditions and mechanisms for atrazine removal by Co@AC were also studied scientifically. As the conditions were pH 4.0, reaction time 90 min and temperature 25 °C, Co@AC had the largest adsorption capacity, which was 92.95 mg/g, and the maximum removal rate reached 94.79%. The correlation coefficient of the Freundlich isotherm was better than that of the Langmuir isotherm, and the adsorption process followed the pseudo-second-order kinetic model. Cycle experiments showed that the removal efficiency of atrazine by Co@AC remained above 85% after five repeated experiments, indicating that Co@AC showed a strong stable performance and is a promising material for pesticides removal.

Published in Water

ISSN: 2073-4441 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Hydraulic engineering; Technology: Environmental technology. Sanitary engineering: Water supply for domestic and industrial purposes
Website: http://www.mdpi.com/journal/water/

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