Ball milling boosted hydrothermal N-doped sludge-derived biochar towards efficiently adsorptive removal of sulfamethoxazole from waters: Behavior, mechanism and DFT study
文献类型： 外文期刊
作者： Ma, Yongfei 1 ; Yao, Yanlai 1 ; Qian, Shufang 2 ; Deng, Zhikang 2 ; Liu, Yan 1 ; Ma, Junwei 3 ; Zhang, Zulin 2 ;
作者机构： 1.Xianghu Lab, Hangzhou 311231, Peoples R China
2.Wuhan Univ Technol, Sch Resources & Environm Engn, Hubei Key Lab Mineral Resources Proc & Environm, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China
3.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizers, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China
4.James Hutton Inst, Aberdeen AB15 8QH, Scotland
关键词： Sulfamethoxazole; N -doping; Ball milling; Environmental safety; Regeneration
期刊名称：SEPARATION AND PURIFICATION TECHNOLOGY （ 影响因子：8.6； 五年影响因子：7.8 ）
ISSN： 1383-5866
年卷期： 2024 年 338 卷
页码：
收录情况： SCI
摘要： Developing an efficient adsorbent is of great significance to eliminate the adverse impacts on human and animals health caused by environmental concentration sulfamethoxazole (SMX). Various N-containing chemicals (ammonium chloride (NH4Cl), thiourea (CH4N2S), urea (CO(NH2)2), and melamine (C3H6N6)) were employed to activate sludge biochar (SBC) under hydrothermal condition. Afterward, the optimum hydrothermal N-doped SBC (NSBC-0.5) (C3H6N6 was confirmed as the perfect N-containing chemical) was further modified by ball milling to prepare BNSBC-0.5. The maximum adsorption capacity of BNSBC-0.5 for SMX calculated from Langmuir was 6.86 x 104 mu g/g. The physicochemical properties analysis, adsorption experiments, together with density functional theory (DFT) calculation confirmed that the process of SMX adsorption onto BNSBC-0.5 was dominantly by Lewis acid-base, pi-pi conjugation, pore filling and electrostatic interactions. The multiple adsorption mechanism guaranteed the high anti-interference of BNSBC-0.5 to inorganic salts/strength and organic matter concentrations range and enabled it to be a promising adsorbent for efficiently eliminating SMX in various actual waters (Yangtze River water (88.5 %), lake water (89.3 %), running water (89.2 %), pure water (92.7 %), and deionized water (92.5 %)). The regenerated (via NaOH desorption) BNSBC-0.5 was capable of sustainably and effectively adsorbing SMX in recycles. Additionally, BNSBC-0.5 exhibited the satisfactory environmental safety in view of the low leaching levels of total nitrogen (TN) over a board pH range. This work synthesized a prospective adsorbent for SMX elimination, also the harmless disposal and waste utilization of sludge were accomplished.
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