Highly effective removal of Hg(ii) solution using corn bract@MoS2 as a new biomass adsorbent

RSC Adv. 2022 Nov 7;12(49):31792-31800. doi: 10.1039/d2ra05638k. eCollection 2022 Nov 3.

ABSTRACT

As known, mercury contamination is one of the current environmental issues due to the high toxicity of mercury. Corn bract (CB) is an agricultural by-product, and its final treatment is generally incineration that causes air pollution. In this study, a new type of high-efficiency biomass adsorbent (CB@MoS2) for adsorption of Hg(ii) was obtained, and its morphology and structure were characterized with FT-IR, XRD, SEM and TEM. The results showed that when the pH value, Hg(ii) ion concentration and adsorption time were 4, 100 mg L-1 and 120 min, the adsorption capacity and removal rate could reach 332.50 mg g-1 and 99.75%. In addition, CB@MoS2 had a good selectivity for Hg(ii) ions. The adsorption behavior followed pseudo-second-order kinetics, indicating that the adsorption of Hg(ii) ions by CB@MoS2 was a chemical adsorption. After five adsorption-desorption experiments, it still possessed good adsorption performance and effective regeneration. In short, CB@MoS2 has high efficiency and good reusability, and will become a candidate material for the treatment of mercury-containing industrial wastewater.

PMID:36380957 | PMC:PMC9638883 | DOI:10.1039/d2ra05638k

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