Waste-to-Wealth: Unlocking the Potential of Pine Sawdust Biochar for Adsorption of Cobalt(II) and Nickel(II) Ions and Sustainable Elimination of Carbamazepine from Aqueous Solutions

ACS Es&t Water Pub Date : 2024-08-19 DOI:10.1021/acsestwater.4c00241

Anna Yukhymchuk, Daria Zhukova, Nataliia Prybora, Nataliya Stolyarchuk, Oleksandr Bondarchuk, Halyna Bodnár Yankovych, Inna V. Melnyk

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Abstract

Sustainable waste management is the recycling, reusing, and recovery of wastes from natural sources. This research studied the conversion of Pinus sylvestris residues into sustainable biochars with improved properties for the adsorption of Co(II) and Ni(II) with further usage of spent biochars in the removal of carbamazepine. The biochars possessed high surface areas and abundant chemical composition with equilibrium adsorption capacities of 0.38 mmol/g for Co(II) and 0.48 mmol/g for Ni(II), forming cobalt phosphate and nickel hydroxide on the biochar surface. The laden biochars efficiently removed carbamazepine through adsorption and under UV light, following a first-order kinetic model with rate constants ranging from 0.0031 to 0.0042 min^–1 and achieving an efficiency of over 80%. The complex interaction mechanisms were responsible for the reduction of the carbamazepine concentration in the studied systems. This research demonstrates that waste wood raw materials can be used as synergistic multifunctional materials.

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废物变健康：发掘松树锯屑生物炭吸附钴（II）和镍（II）离子以及可持续地消除水溶液中卡马西平的潜力

可持续废物管理是从自然来源中回收、再利用和再生废物。本研究将欧洲赤松（Pinus sylvestris）残留物转化为可持续生物炭，并改进其吸附钴（II）和镍（II）的性能，进一步利用废生物炭去除卡马西平。生物炭具有高表面积和丰富的化学成分，对 Co(II) 和 Ni(II) 的平衡吸附容量分别为 0.38 mmol/g 和 0.48 mmol/g，在生物炭表面形成磷酸钴和氢氧化镍。负载生物炭通过吸附并在紫外光下有效去除卡马西平，其吸附过程遵循一阶动力学模型，速率常数为 0.0031 至 0.0042 min-1，去除效率超过 80%。复杂的相互作用机制是降低所研究体系中卡马西平浓度的原因。这项研究表明，废木材原料可用作协同多功能材料。

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