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The Removal of Cr(VI) from Aqueous Solutions with Corn Stalk Biochar

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  • Wenling Yang

    (Key Laboratory of Microbial Engineering at the Institute of Biology, Henan Academy of Sciences, Zhengzhou 450008, China)

  • Gao Lei

    (Key Laboratory of Microbial Engineering at the Institute of Biology, Henan Academy of Sciences, Zhengzhou 450008, China)

  • Shujing Quan

    (Key Laboratory of Microbial Engineering at the Institute of Biology, Henan Academy of Sciences, Zhengzhou 450008, China)

  • Longfei Zhang

    (Key Laboratory of New Materials and Facilities for Rural Renewable Energy (Ministry of Agriculture and Rural Affairs of China), Henan Agricultural University, Zhengzhou 450002, China)

  • Baitao Wang

    (Key Laboratory of Microbial Engineering at the Institute of Biology, Henan Academy of Sciences, Zhengzhou 450008, China)

  • Hong Hu

    (Key Laboratory of Microbial Engineering at the Institute of Biology, Henan Academy of Sciences, Zhengzhou 450008, China)

  • Liangliang Li

    (Key Laboratory of Microbial Engineering at the Institute of Biology, Henan Academy of Sciences, Zhengzhou 450008, China)

  • Huan Ma

    (Key Laboratory of Microbial Engineering at the Institute of Biology, Henan Academy of Sciences, Zhengzhou 450008, China)

  • Chaohui Yin

    (Key Laboratory of New Materials and Facilities for Rural Renewable Energy (Ministry of Agriculture and Rural Affairs of China), Henan Agricultural University, Zhengzhou 450002, China)

  • Fei Feng

    (Key Laboratory of Microbial Engineering at the Institute of Biology, Henan Academy of Sciences, Zhengzhou 450008, China)

  • Yanyan Jing

    (Key Laboratory of New Materials and Facilities for Rural Renewable Energy (Ministry of Agriculture and Rural Affairs of China), Henan Agricultural University, Zhengzhou 450002, China)

Abstract

The discharge of wastewater containing hexavalent chromium (Cr(VI)) into the environment is very harmful to living things. Therefore, before effluent that contains Cr(VI) can be discharged into the environment, this toxin should be removed from the contaminated water. In this study, corn stalk biochar was investigated to evaluate the Cr(VI) removal efficiency from an aqueous solution. The effects of pH (2–10), biochar concentration (0.5 to 10 g/L), Cr(VI) concentration (10–500 mg/L), and contact time (10–1440 min) were studied. The actual experimental value of the Cr(VI) removal efficiency was 28.67%, largely consistent with the predicted model value of 29.31%, under the optimal conditions of a Cr(VI) concentration of 60 g/L, pH 4, contact time of 270 min, and a biochar concentration of 4.5 g/L. A significant interaction between the Cr(VI) concentration and pH was observed, along with significance in the interaction between Cr(VI) concentration and biochar concentration, which had a greater impact on the removal of Cr(VI). Biosorption onto corn stalk biochar is an affordable and economical adsorption process to treat wastewater contaminated with Cr(VI). The aim of this study is to provide data to serve as a basis for future studies on the use of raw agricultural waste to remove Cr(VI).

Suggested Citation

  • Wenling Yang & Gao Lei & Shujing Quan & Longfei Zhang & Baitao Wang & Hong Hu & Liangliang Li & Huan Ma & Chaohui Yin & Fei Feng & Yanyan Jing, 2022. "The Removal of Cr(VI) from Aqueous Solutions with Corn Stalk Biochar," IJERPH, MDPI, vol. 19(21), pages 1-13, October.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:21:p:14188-:d:958158
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    References listed on IDEAS

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    1. Tanzeela Kokab & Hafiza Sumbal Ashraf & Muhammad Bilal Shakoor & Asim Jilani & Sajid Rashid Ahmad & Muzaffar Majid & Shafaqat Ali & Nazar Farid & Rana A. Alghamdi & Diana A. H. Al-Quwaie & Khalid Rehm, 2021. "Effective Removal of Cr(VI) from Wastewater Using Biochar Derived from Walnut Shell," IJERPH, MDPI, vol. 18(18), pages 1-13, September.
    2. Zuwen Liu & Shi Yang & Linan Zhang & Jinfeng Zeng & Shuai Tian & Yuan Lin, 2022. "The Removal of Pb 2+ from Aqueous Solution by Using Navel Orange Peel Biochar Supported Graphene Oxide: Characteristics, Response Surface Methodology, and Mechanism," IJERPH, MDPI, vol. 19(8), pages 1-18, April.
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