CIESC Journal ›› 2022, Vol. 73 ›› Issue (5): 2111-2119.DOI: 10.11949/0438-1157.20211848

• Energy and environmental engineering • Previous Articles     Next Articles

Influence of pyrolysis time on sludge-derived biochar performance for peroxymonosulfate activation

Guanyi CHEN1,2(),Tujun TONG1,3,Rui LI1,Yanshan WANG1,Beibei YAN1,Ning LI1(),Li'an HOU1   

  1. 1.School of Environmental Science & Engineering,Tianjin University,Tianjin 300350,China
    2.School of Mechanical Engineering,Tianjin University of Commerce,Tianjin 300134,China
    3.China Energy Conservation and Environmental Protection Group,Beijing 100082,China
  • Received:2021-12-30 Revised:2022-02-19 Online:2022-05-24 Published:2022-05-05
  • Contact: Ning LI

热解时间对污泥生物炭活化过硫酸盐的影响研究

陈冠益1,2(),童图军1,3,李瑞1,王燕杉1,颜蓓蓓1,李宁1(),侯立安1   

  1. 1.天津大学环境科学与工程学院,天津 300350
    2.天津商业大学机械工程学院,天津 300134
    3.中国节能环保集团有限公司,北京 100082
  • 通讯作者: 李宁
  • 作者简介:陈冠益(1970—),男,教授,chen@tju.edu.cn
  • 基金资助:
    国家自然科学基金项目(52100156);深圳市科技计划项目(GJHZ20200731095801005)

Abstract:

Biochar production by sewage sludge pyrolysis is an effective approach for sludge treatment and resource utilization. By controlling the pyrolysis time, regulating the active sites on the surface of sludge biochar, and changing the composition of active species in the peroxymonosulfate (PMS) system, the efficient degradation of ciprofloxacin (CIP) can be achieved. Research found that the sludge-derived biochar exhibited high PMS activation performance, achieving nearly 90% removal of CIP at pyrolysis time of 120 min and pyrolysis temperature of 700℃. The mechanism exploration showed that 1O2 played a major role in the system. The C??????O, pyrrolic N and —OH sites might accelerate the production of 1O2. Besides, C—O, pyridine N, lattice oxygen and Fe sites promoted the release of ?OH and SO4?-. Graphite N played a positive role in PMS activation to produce SO4?-.

Key words: pyrolysis, sludge, biochar, peroxymonosulfate

摘要:

污泥热解制备生物炭是一种污泥有效处理处置与资源化利用方法。通过控制热解时间,调控污泥生物炭表面的活性位点,改变过一硫酸盐(PMS)体系中的活性物种组成,可实现环丙沙星(CIP)的高效降解。研究发现,热解温度为700℃、热解时间为120 min时,污泥生物炭具有较高的PMS活化性能,对CIP的去除率近90%。机理探究表明,1O2在体系中发挥主要作用。C??????O、吡咯氮和—OH位点有利于1O2产生,C—O、吡啶氮、晶格氧和Fe位点促进?OH和SO4?-释放,石墨氮可促进PMS活化产生SO4?-

关键词: 热解, 污泥, 生物炭, 过硫酸盐

CLC Number: