Enhanced Adsorptivity of Hexavalent Chromium in Aqueous Solutions Using CTS@nZVI Modified Wheat Straw-Derived Porous Carbon.

Tiantian Deng, Hansheng Li, Su Ding, Feng Chen, Jingbao Fu, Junwei Zhao

Abstract read

In one paragraph

Article in Nanomaterials (Basel, Switzerland), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

6 authors.

Tiantian DengSchool of Environmental and Biological Engineering, Henan University of Engineering, Zhengzhou 451191, China.

Hansheng LiSchool of Environmental and Biological Engineering, Henan University of Engineering, Zhengzhou 451191, China.

Su DingSchool of Environmental and Biological Engineering, Henan University of Engineering, Zhengzhou 451191, China.

Feng ChenSchool of Environmental and Biological Engineering, Henan University of Engineering, Zhengzhou 451191, China.

Jingbao FuSchool of Environmental and Biological Engineering, Henan University of Engineering, Zhengzhou 451191, China.

Junwei ZhaoCollege of Resources and Environment, Yangtze University, Wuhan 434023, China.

Funding

Natural Science Foundation of Henan province 232300421343Natural Science Foundation of Henan Province, grant number 2023KJ005NSFC-China 42377490Project for Young Key Teachers of Henan Province, grant number 2020GGJS238

6 · The paper itself

Abstract

Using KOH-modified wheat straw as the precursor, wheat straw biochar was produced through carbonization at 500 °C. Subsequently, a synthetic material containing nano-zero-valent iron (nZVI) was prepared via liquid phase reduction (nZVI-WSPC). To enhance its properties, chitosan (CTS) was used by crosslinking to form the new adsorbent named CTS@nZVI-WSPC. The impact of CTS on parameters such as mass ratio, initial pH value, and adsorbent dosage on the adsorption efficiency of Cr(VI) in solution was investigated through one-factor experiments. Isotherm adsorption and thermodynamic analysis demonstrated that the adsorption of Cr(VI) by CTS@nZVI-WSPC conforms to the Langmuir model, with a maximum adsorption capacity of 147.93 mg/g, and the adsorption process is endothermic. Kinetic analysis revealed that the adsorption process follows a pseudo-second-order kinetic model. The adsorption mechanism, as elucidated by SEM, FTIR, XPS, and XRD, suggests that the process may involve multiple mechanisms, including pore adsorption, electrostatic adsorption, chemical reduction, and surface chelation. The adsorption capacity of Cr(VI) by CTS@nZVI-WSPC remains high after five cycles. The adsorbent is simple to operate, economical, efficient, and reusable, making it a promising candidate for the treatment of Cr(VI) in water.

Indexed as

adsorptionchemical reductionchitosanchromiumnZVIwheat straw biochar

Identifiers

PMID38869598

DOI10.3390/nano14110973

PMCPMC11173464

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