Scholarlink

<p>Pharmaceuticals in water environments have attracted widespread attention due to their poor degradability under natural conditions. The peroxymonosulfate (PMS)-based advanced oxidation processes can effectively eliminate pharmaceuticals using highly oxidizing active species (•OH, SO<sub>4</sub><sup>•−</sup>, <sup>1</sup>O<sub>2</sub>, etc.) generated instantly. In this work, a biochar (BC) originated from waste rice husks was manufactured and employed to catalyze PMS in degrading acetaminophen (ACT), a representative pharmaceutical. The efficiencies of three BCs (RHBC300, RHBC500, RHBC700) fabricated at various pyrolysis temperatures toward PMS activation were investigated. The influencing factors, degradation kinetics, reuse performance, and activation mechanisms of BC/PMS process were analyzed. Furthermore, the effectiveness of this process in treating ACT in different water matrices was also examined. The results demonstrated that RHBC700/PMS system could achieve almost 100% of ACT removal within 60&#xa0;min under optimal conditions, and still removed more than 80% of ACT after five rounds of RHBC700 reuse. The PMS concentration, RHBC700 dosage, anion concentrations, and natural organic matter exhibited more pronounced effects on ACT removal. The degradation of ACT under various conditions conformed to second-order kinetic equations. In addition, active species SO<sub>4</sub><sup>•−</sup>, •OH, O<sub>2</sub><sup>•−</sup>, and <sup>1</sup>O<sub>2</sub> were produced in the RHBC700/PMS system, which degraded ACT in both radical and non-radical routes. The benefits of this study are to realize simultaneous wastewater treatment and agricultural waste management.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Low-cost biochar employed in peroxymonosulfate activation for efficient acetaminophen elimination: efficiencies, kinetics and mechanisms

  • 期刊论文

  • 发表日期：

    2025年5月24日

查看全文
  • Lizhu Chen,
  • Yu Zhao,
  • Shuo Xu,
  • Hongyan Wei,
  • Mengguo Gao,
  • Tiehong Song

摘要

Pharmaceuticals in water environments have attracted widespread attention due to their poor degradability under natural conditions. The peroxymonosulfate (PMS)-based advanced oxidation processes can effectively eliminate pharmaceuticals using highly oxidizing active species (•OH, SO4•−, 1O2, etc.) generated instantly. In this work, a biochar (BC) originated from waste rice husks was manufactured and employed to catalyze PMS in degrading acetaminophen (ACT), a representative pharmaceutical. The efficiencies of three BCs (RHBC300, RHBC500, RHBC700) fabricated at various pyrolysis temperatures toward PMS activation were investigated. The influencing factors, degradation kinetics, reuse performance, and activation mechanisms of BC/PMS process were analyzed. Furthermore, the effectiveness of this process in treating ACT in different water matrices was also examined. The results demonstrated that RHBC700/PMS system could achieve almost 100% of ACT removal within 60 min under optimal conditions, and still removed more than 80% of ACT after five rounds of RHBC700 reuse. The PMS concentration, RHBC700 dosage, anion concentrations, and natural organic matter exhibited more pronounced effects on ACT removal. The degradation of ACT under various conditions conformed to second-order kinetic equations. In addition, active species SO4•−, •OH, O2•−, and 1O2 were produced in the RHBC700/PMS system, which degraded ACT in both radical and non-radical routes. The benefits of this study are to realize simultaneous wastewater treatment and agricultural waste management.