{"title":"Adsorption properties and mechanisms of Cd by co-pyrolysis composite material derived from peanut biochar and tailing waste.","authors":"Xiaoqing Zhang, Jiong Li, Xin Li, Zhihua Chen, Dajun Ren, Shuqin Zhang","doi":"10.1007/s10653-024-02352-1","DOIUrl":null,"url":null,"abstract":"<p><p>Cadmium (Cd) contamination in aquatic systems is a widespread environmental issue. In this study, a solid waste iron tailings and biochar hybrid (Fe-TWBC) was successfully synthesized derived from co-pyrolysis of peanut shell and tailing waste (Fe-TW). Characterization analyses showed that the metal oxides from solid waste iron tailings successfully loaded onto the biochar surface, with more functional groups in Fe-TWBC. The Fe-TWBC had a maximum capacity of 95.06 mg·g<sup>-1</sup> on Cd<sup>2+</sup> adsorption, which was 1.40 times to pristine BC (70.46 mg·g<sup>-1</sup>) and 2.53 times to Fe-TW (37.51 mg·g<sup>-1</sup>). The adsorption behavior followed the pseudo-second-order kinetics and Freundlich models. DFT calculations revealed that the O-top of Fe-O group was the most chemically reactive site for Cd<sup>2+</sup> adsorption with the high adsorption energy values of - 4.05 eV, short O-Cd bond lengths (2.133 Å), low electrostatic potentials in small blue regions near the O atom of Fe-O group, low energy gap (0.22 eV) and large electrophilic Fukui index (f<sup>-</sup> = 0.18). Overall, these findings suggest that Fe-TWBC is effective in removing Cd<sup>2+</sup> from aqueous solution and promotes the utilization of biowaste and solid waste iron tailing waste for cleaner production.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 2","pages":"37"},"PeriodicalIF":3.2000,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Geochemistry and Health","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1007/s10653-024-02352-1","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0
Abstract
Cadmium (Cd) contamination in aquatic systems is a widespread environmental issue. In this study, a solid waste iron tailings and biochar hybrid (Fe-TWBC) was successfully synthesized derived from co-pyrolysis of peanut shell and tailing waste (Fe-TW). Characterization analyses showed that the metal oxides from solid waste iron tailings successfully loaded onto the biochar surface, with more functional groups in Fe-TWBC. The Fe-TWBC had a maximum capacity of 95.06 mg·g-1 on Cd2+ adsorption, which was 1.40 times to pristine BC (70.46 mg·g-1) and 2.53 times to Fe-TW (37.51 mg·g-1). The adsorption behavior followed the pseudo-second-order kinetics and Freundlich models. DFT calculations revealed that the O-top of Fe-O group was the most chemically reactive site for Cd2+ adsorption with the high adsorption energy values of - 4.05 eV, short O-Cd bond lengths (2.133 Å), low electrostatic potentials in small blue regions near the O atom of Fe-O group, low energy gap (0.22 eV) and large electrophilic Fukui index (f- = 0.18). Overall, these findings suggest that Fe-TWBC is effective in removing Cd2+ from aqueous solution and promotes the utilization of biowaste and solid waste iron tailing waste for cleaner production.
期刊介绍：
Environmental Geochemistry and Health publishes original research papers and review papers across the broad field of environmental geochemistry. Environmental geochemistry and health establishes and explains links between the natural or disturbed chemical composition of the earth’s surface and the health of plants, animals and people.
Beneficial elements regulate or promote enzymatic and hormonal activity whereas other elements may be toxic. Bedrock geochemistry controls the composition of soil and hence that of water and vegetation. Environmental issues, such as pollution, arising from the extraction and use of mineral resources, are discussed. The effects of contaminants introduced into the earth’s geochemical systems are examined. Geochemical surveys of soil, water and plants show how major and trace elements are distributed geographically. Associated epidemiological studies reveal the possibility of causal links between the natural or disturbed geochemical environment and disease. Experimental research illuminates the nature or consequences of natural or disturbed geochemical processes.
The journal particularly welcomes novel research linking environmental geochemistry and health issues on such topics as: heavy metals (including mercury), persistent organic pollutants (POPs), and mixed chemicals emitted through human activities, such as uncontrolled recycling of electronic-waste; waste recycling; surface-atmospheric interaction processes (natural and anthropogenic emissions, vertical transport, deposition, and physical-chemical interaction) of gases and aerosols; phytoremediation/restoration of contaminated sites; food contamination and safety; environmental effects of medicines; effects and toxicity of mixed pollutants; speciation of heavy metals/metalloids; effects of mining; disturbed geochemistry from human behavior, natural or man-made hazards; particle and nanoparticle toxicology; risk and the vulnerability of populations, etc.
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