Journal Article10.1016/j.enmm.2022.100726
Carbothermal reduction synthesis of eggshell-biochar modified with nanoscale zerovalent iron/activated carbon for remediation of soil polluted with lead and cadmium
Moses Akintayo Aborisade,Aixi Feng,Xuehao Zheng,Belay Tafa Oba,Akash Kumar,Ashenafi Yohannes Battamo,Sheila Kavwenje,Jiashu Liu,Daying Chen,Oluwaseun Princess Okimiji,Oluwasheyi Zacchaeus Ojekunle,Yongkui Yang,Peizhe Sun,Lin Zhao +13 more
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TL;DR: In this article , an eggshell-biochar modified with nanoscale zerovalent iron/activated carbon (ESB-nZVI/AC) was synthesized via carbothermal reduction synthesis and compared their immobilization efficiency at different temperatures.
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Abstract: Pollution of soil with lead (Pb) and cadmium (Cd) has been gaining researchers' attention because of their adverse health effects on the safety of the food chain and environmental health. Hence, their immobilization in the soil is of great interest to environmental scientists globally. In this study, eggshell-biochar modified with nanoscale zerovalent iron/activated carbon (ESB-nZVI/AC) were synthesized via carbothermal reduction synthesis and compared their immobilization efficiency at different temperatures. The results showed that ESB-nZVI/AC is highly efficient in reducing the bioavailability, toxicity leaching, and invitro bioaccessible Pb and Cd in the soil through conversion to their respective carbonate, hydroxide, and iron oxide insoluble forms. The observed results were due to the effects of modification and increment in surface area of the prepared treatments, which further enhance the active functional sites, immobilization effectiveness, and stability of ESB-nZVI/AC. Analysis of ESB-nZVI/AC after reaction using FTIR, XRD, and XPS suggested that: adsorption, co-precipitation/precipitation, electrostatic interactions, ion exchange, reduction, physical-chemisorption, and surface complexation formation were all involved in the immobilization of Pb and Cd in soil. It can be concluded that co-preparation of ESB-nZVI/AC is another alternative and sustainable adsorbent to remediate soil polluted with toxic metals and simultaneously improve soil nutritional contents.
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Citations
Remediation of soil polluted with Pb and Cd and alleviation of oxidative stress in Brassica rapa plant using nanoscale zerovalent iron supported with coconut-husk biochar.
Moses Akintayo Aborisade,Hongzhi Geng,Belay Tafa Oba,A.K.Gautam Navneet Kumar,Efomah Andrew Ndudi,Ashenafi Yohannes Battamo,Jiashu Liu,Daying Chen,Oluwaseun Princess Okimiji,Yongkui Yang,Peizhe Sun,Lin Zhao +11 more
TL;DR: In this article , a nanoscale zerovalent iron supported with coconut-husk biochar (nZVI-CHB) was synthesized through carbothermal reduction process using Fe2O3 and coconuthusk, and the stabilization effects of varying concentrations of nZVI and CHB on cadmium (Cd) and lead (Pb) in soil were analyzed, and their effects on toxic metals induced oxidative stress, physiological properties, and antioxidant defence systems of the Brassica rapa plant were also checked.
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Cultivating sustainability: Harnessing biochar-derived composites for carbon-neutral wastewater treatment
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TL;DR: Cultivating sustainability through biochar-derived composites for carbon-neutral wastewater treatment. BDCs have high adsorption capacity and can contribute to carbon sequestration and climate change mitigation.
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Optimization of Mixed-Based Biochar Preparation Process and Adsorption Performance of Lead and Cadmium
Xiaoxian Yuan,Qiang Wang,Zhipu Wang,Sikai Wu,Yawei Zhai,Haibing Zhang,Lisong Zhou,Bei Lu,Ke Chen,Xinwei Wang +9 more
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