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Open AccessArticle

Removal of Hexavalent Chromium from Aqueous Solutions Using Sulfonated Peat

Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
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Water 2019, 11(10), 1980; https://doi.org/10.3390/w11101980
Received: 12 August 2019 / Revised: 4 September 2019 / Accepted: 19 September 2019 / Published: 23 September 2019
(This article belongs to the Section Wastewater Treatment and Reuse)
Peat, a loose and porous material, contains rich organic matter and can be used as an adsorbent. In this study, it is chemically modified by adding sulfuric acid under different conditions, with the aim of producing a modified peat with optimized Cr(VI) adsorption capability. The modified peat exhibited a higher adsorption efficiency than the natural peat throughout the adsorption experiments. The adsorption of Cr(VI) from aqueous solutions correlates with the pseudo-second order kinetic model. In addition, the Langmuir model indicated a maximum loading capacity approximately of 105.4 mg/g, which is a markedly high value compared to some other reported adsorbents. The present study performed single factor experiments and the results indicated that higher temperature conditions result in better adsorption capability, whilst an increase in the pH played a contrary role. According to the orthogonal tests, the pH had the greatest impact on adsorption. The obtained results indicated that sulfonated peat can be effectively applied in removing Cr (VI). View Full-Text
Keywords: sulfonated peat; Cr (VI) adsorption; kinetics; equilibrium; orthogonal test sulfonated peat; Cr (VI) adsorption; kinetics; equilibrium; orthogonal test
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MDPI and ACS Style

Li, H.; Hou, R.; Chen, Y.; Chen, H. Removal of Hexavalent Chromium from Aqueous Solutions Using Sulfonated Peat. Water 2019, 11, 1980. https://doi.org/10.3390/w11101980

AMA Style

Li H, Hou R, Chen Y, Chen H. Removal of Hexavalent Chromium from Aqueous Solutions Using Sulfonated Peat. Water. 2019; 11(10):1980. https://doi.org/10.3390/w11101980

Chicago/Turabian Style

Li, Haiqing; Hou, Rongrong; Chen, Yuefang; Chen, Huilun. 2019. "Removal of Hexavalent Chromium from Aqueous Solutions Using Sulfonated Peat" Water 11, no. 10: 1980. https://doi.org/10.3390/w11101980

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