Steam-activated biochar for efficient removal of sulfamethoxazole from water: Activation temperature-mediated differences

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-03-19 DOI:10.1016/j.jwpe.2025.107462

Shaowen Rong, Yuge He, Liangmeng Ni, Qi Gao, Xin Feng, Shushu Liu, Yanhang Zhong, Yuguo Li , Zhijia Liu

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Abstract

Bamboo activated carbon (BCAs) was manufactured through water steam activation of bamboo-biochar (BC) at different temperatures for 1 h. The physicochemical properties of BCAs and adsorption behaviors of sulfamethoxazole (SMX) were investigated. The results concluded that steam activation increased specific surface area (SSA) of BC by 56.97–87.73 times. The BCA₈₅₀, activated at temperature of 850 °C, showed the excellent adsorption performance due to the well-developed graded pore structure, the maximum SSA of 1583.07 m²/g, the least oxygen-containing functional groups, and the most surface defects. Chemical adsorption initially resulted in SMX removal on the surface of BCA₈₅₀. Because of pore structures and pore filling mechanism, multilayer adsorption of high concentrations gradually replaced monolayer adsorption of low concentrations. 2D graphitic-like structures increased π-π electron donor-acceptor potential positions, which was beneficial to remove SMX in acidic water. BCA₈₅₀ reached adsorption equilibrium for 90 min with an adsorption capacity of 204.07 mg/g. Both original minerals of BCAs and adsorption process increased the pH of acidic SMX solutions. Active adsorption sites of BCA₈₅₀ were regenerated by methanol with an original adsorption capacity of 87.89 %.

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies