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Article

Enhanced Single and Simultaneous As(III) Adsorption in Pearl River Delta Water by Hexylamine Functionalized Vermiculite

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School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
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Department of Energy and Environment Engineering, Dawood University of Engineering and Technology, Karachi 74800, Pakistan
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The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China
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Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou 510006, China
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Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou 510006, China
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Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, Guangzhou 510006, China
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Department of Civil and Environmental Engineering, Hanyang University, Seoul 04763, Korea
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Author to whom correspondence should be addressed.
Academic Editor: Tushar Kanti Sen
Water 2021, 13(17), 2412; https://doi.org/10.3390/w13172412
Received: 20 July 2021 / Revised: 26 August 2021 / Accepted: 29 August 2021 / Published: 2 September 2021
(This article belongs to the Special Issue Solid/Liquid Adsorption in Water and Wastewater Treatment)
Enhanced As(III) removal (>99.7) was achieved by a novel organoclay (HEX-VER) adsorbent in Pearl River Delta water. Single and simultaneous As(III) removal in the presence of Cd(II) and/or Pb(II) by batch adsorption tests was analyzed. Spectroscopic, spectrometric, microscopic, and potentiometric techniques were used for characterization of the adsorbents. The parameters affecting As(III) adsorption, including pH, kinetic, isotherm, thermodynamic, and co-existing ions (Cl, F, NO3, CO32−, SO42−, Ca2+ and Mg2+) were also investigated. The results showed that HEX-VER owned different morphology and larger average pore diameter after functionalization, resulting in an improvement of As (III) adsorption capacity. Further analysis confirmed that adsorption was of the monomolecular layer, well-described by the Langmuir isotherm model. The dominant mechanisms for As(III) removal were ion-exchange and complexation. Moreover, HEX-VER was regenerated for five consecutive cycles, and the removal ratio was ≈ 92%, showing its great regeneration potential. These findings suggest that the proposed inexpensive adsorbent has potential for practical applications of As(III) removal from river water. View Full-Text
Keywords: As(III); simultaneous adsorption; Pearl River Delta (PRD); Hexylamine; Vermiculite As(III); simultaneous adsorption; Pearl River Delta (PRD); Hexylamine; Vermiculite
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MDPI and ACS Style

Ahmed, Z.; Wu, P.; Xu, Y.; Keerio, H.A.; Wu, J.; Ye, Q.; Niu, W.; Chen, M.; Dang, Z. Enhanced Single and Simultaneous As(III) Adsorption in Pearl River Delta Water by Hexylamine Functionalized Vermiculite. Water 2021, 13, 2412. https://doi.org/10.3390/w13172412

AMA Style

Ahmed Z, Wu P, Xu Y, Keerio HA, Wu J, Ye Q, Niu W, Chen M, Dang Z. Enhanced Single and Simultaneous As(III) Adsorption in Pearl River Delta Water by Hexylamine Functionalized Vermiculite. Water. 2021; 13(17):2412. https://doi.org/10.3390/w13172412

Chicago/Turabian Style

Ahmed, Zubair, Pingxiao Wu, Yijing Xu, Hareef A. Keerio, Jiayan Wu, Quanyun Ye, Wenchao Niu, Meiqing Chen, and Zhi Dang. 2021. "Enhanced Single and Simultaneous As(III) Adsorption in Pearl River Delta Water by Hexylamine Functionalized Vermiculite" Water 13, no. 17: 2412. https://doi.org/10.3390/w13172412

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