摘要
为探究市政污泥好氧堆肥过程中多环芳烃(PAHs)的去除动态,本研究以沈阳市市政污泥为研究对象,进行3个批次的好氧堆肥现场试验,分析了市政污泥中PAHs的污染特征、污染来源及堆肥过程中PAHs的去除动态。结果表明:不同季节沈阳市市政污泥中∑PAHs含量差异较大,范围为0.82~3.73 mg·kg^(-1),夏季污泥成分以高环PAHs(n≥4)为主(质量比为94.0%),而冬季和春季污泥以低环PAHs(n<4)为主,质量比分别为76.0%和63.0%。采用双比值法对沈阳市污泥中PAHs进行源解析,结果显示污泥中PAHs的主要来源为煤的燃烧源。经过堆肥处理后∑PAHs去除率大小顺序为春季(52.8%)>夏季(49.1%)>冬季(46.7%)。研究表明,好氧堆肥对PAHs有明显的降解效果,有利于实现污泥的无害化和资源化。
This study conducted three batches of aerobic compost field experiments using Shenyang municipal sludge to investigate the removal dynamics of polycyclic aromatic hydrocarbons(PAHs)during aerobic composting.The analysis focused on the pollution characteristics,pollution sources,and removal dynamics of PAHs in municipal sludge.The results showed significant variations in the content of ΣPAHs in Shenyang municipal sludge across different seasons,ranging from 0.82 mg∙kg^(-1) to 3.73 mg·kg^(-1).High-ring PAHs(n≥4)accounted for 94.0%of the sludge composition in summer,while low-ring PAHs(n<4)dominated in winter and spring with mass ratios of 76.0%and 63.0%,respectively.Source analysis of PAHs in Shenyang sludge using the double ratio method indicated that the main source of PAHs in the sludge was coal combustion.The degradation effect of PAHs after composting followed the order ofΣPAHs removal rate in spring at 52.8%,followed by summer at 49.1%,and winter at 46.7%.Aerobic composting resulted in significant degradation of PAHs,which contributes to the achievement of harmless resource recovery from sludge.
作者
张慧钰
宋雪英
由明超
薛丽媛
李凤娇
赵晓旭
王兴
ZHANG Huiyu;SONG Xueying;YOU Mingchao;XUE Liyuan;LI Fengjiao;ZHAO Xiaoxu;WANG Xing(Key Laboratory of Regional Environment and Eco-Remediation,Ministry of Education,Shenyang University,Shenyang 110044,China;Fujian Provincial Key Laboratory of Ecology-Toxicological Effects&Control for Emerging Contaminants,Putian University,Putian 351100,China;Liaoning Huadian Changxing Biological Environmental Protection Co.,Ltd.,Shenyang 110000,China)
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2024年第2期419-425,共7页
Journal of Agro-Environment Science
基金
国家自然科学基金项目(41907220)
福建省新型污染物生态毒理效应与控制重点实验室开放基金项目(PY21003)
沈阳市中青年人才科技支持计划项目(RC190371)。
关键词
多环芳烃
污泥
好氧堆肥
源解析
polycyclic aromatic hydrocarbons
sludge
aerobic composting
source analysis