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Volume 13
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10.3390/w13020240
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Article

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

by
Yongpan Liu
1,
Danxia Liu
1,
Huijun He
1,2,3,*,
Jinxiao Zhang
4,*,
Jie Liu
1,2,3,
Dunqiu Wang
1,2,3,
Liangliang Huang
1,2,3 and
Zhihong Tu
1,2,3
1
College of Environmental Science and Engineering, and Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
2
Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China
3
Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin University of Technology, Guilin 541004, China
4
College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
*
Authors to whom correspondence should be addressed.
Water 2021, 13(2), 240; https://doi.org/10.3390/w13020240
Submission received: 24 December 2020 / Revised: 15 January 2021 / Accepted: 16 January 2021 / Published: 19 January 2021
(This article belongs to the Section Wastewater Treatment and Reuse)
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Abstract

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.
Keywords: atrazine; cobalt; activated carbon; adsorption isotherm; adsorption kinetic atrazine; cobalt; activated carbon; adsorption isotherm; adsorption kinetic

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MDPI and ACS Style

Liu, Y.; Liu, D.; He, H.; Zhang, J.; Liu, J.; Wang, D.; Huang, L.; Tu, Z. Preparation, Performances and Mechanisms of Co@AC Composite for Herbicide Atrazine Removal in Water. Water 2021, 13, 240. https://doi.org/10.3390/w13020240

AMA Style

Liu Y, Liu D, He H, Zhang J, Liu J, Wang D, Huang L, Tu Z. Preparation, Performances and Mechanisms of Co@AC Composite for Herbicide Atrazine Removal in Water. Water. 2021; 13(2):240. https://doi.org/10.3390/w13020240

Chicago/Turabian Style

Liu, Yongpan, Danxia Liu, Huijun He, Jinxiao Zhang, Jie Liu, Dunqiu Wang, Liangliang Huang, and Zhihong Tu. 2021. "Preparation, Performances and Mechanisms of Co@AC Composite for Herbicide Atrazine Removal in Water" Water 13, no. 2: 240. https://doi.org/10.3390/w13020240

APA Style

Liu, Y., Liu, D., He, H., Zhang, J., Liu, J., Wang, D., Huang, L., & Tu, Z. (2021). Preparation, Performances and Mechanisms of Co@AC Composite for Herbicide Atrazine Removal in Water. Water, 13(2), 240. https://doi.org/10.3390/w13020240

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