Enhanced removal of heavy metal chromium than lead from aqueous solution by glutaraldehyde crosslinked grafted chitosan biomass/bentonite composite

IF 4.1 4区工程技术 Q3 ENERGY & FUELS

Biomass Conversion and Biorefinery Pub Date : 2025-03-13 DOI:10.1007/s13399-025-06735-x

Nithya Ravi, Mohammad Khalid Al-Sadoon, Daisy Rani James Durai, Supriya Prasad Parappurath, Ansar Ali Zainul Abideen, Sudha Parappurath Narayanan

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Abstract

The present study investigates the potential of glutaraldehyde crosslinked grafted chitosan biomass/bentonite composite as an adsorbent for the removal of Cr(VI) and Pb(II) ions from aqueous solutions. The composite was synthesized by grafting chitosan biomass obtained from crab shells with n-butyl acrylate using ceric ammonium nitrate as an initiator, followed by blending with bentonite clay in a 1:1 ratio and crosslinking with glutaraldehyde. The prepared composite was characterized using FTIR and XRD techniques. Batch adsorption experiments were conducted to determine the ideal settings for removing heavy metal ions at a constant temperature of 30 °C by adjusting pH, adsorbent dosage, contact duration, and beginning metal ion concentration. The results demonstrated the synergistic effect of the materials used in the composite, enhancing its adsorption capacity for Cr(VI) and Pb(II) ions. The adsorption capacity of the sorbent for metal Cr(VI) ions was more than that of Pb(II) ions. The removal percentage of both the metal ions was > 90%. The study highlights the potential of the Cs-g-PBA/Bent composite as an eco-friendly and cost-effective alternative to activated carbon for the treatment of heavy metal-contaminated wastewater and contributes to the development of sustainable solutions for environmental remediation and helps in promoting human health.

Graphical Abstract

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戊二醛交联接枝壳聚糖生物质/膨润土复合材料对水中重金属铬的去除效果优于铅

本研究探讨了戊二醛交联接枝壳聚糖生物质/膨润土复合材料作为吸附剂去除水溶液中Cr（VI）和Pb（II）离子的潜力。以硝酸铈铵为引发剂，将蟹壳壳聚糖生物质与丙烯酸正丁酯接枝，再与膨润土按1:1比例共混，与戊二醛交联，合成了该复合材料。采用FTIR和XRD技术对所制备的复合材料进行了表征。通过调整pH、吸附剂用量、接触时间和起始金属离子浓度，进行批量吸附实验，确定在30℃恒温条件下去除重金属离子的理想条件。结果表明，复合材料的协同作用增强了其对Cr（VI）和Pb（II）离子的吸附能力。吸附剂对金属Cr（VI）离子的吸附量大于对Pb（II）离子的吸附量。两种金属离子的去除率均达90%。该研究强调了Cs-g-PBA/Bent复合材料作为处理重金属污染废水的一种生态友好且具有成本效益的活性炭替代品的潜力，有助于开发环境修复的可持续解决方案，并有助于促进人类健康。图形抽象

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来源期刊

Biomass Conversion and Biorefinery Energy-Renewable Energy, Sustainability and the Environment

CiteScore

7.00

自引率

15.00%

发文量

1358

期刊介绍： Biomass Conversion and Biorefinery presents articles and information on research, development and applications in thermo-chemical conversion; physico-chemical conversion and bio-chemical conversion, including all necessary steps for the provision and preparation of the biomass as well as all possible downstream processing steps for the environmentally sound and economically viable provision of energy and chemical products.