摘要
以玉米秸秆和城市污泥为生物质原材料,并于300、500、700℃下厌氧热解,分析生物炭和生物油中PAHs的生成、分配及毒性特征.结果表明：玉米秸秆和城市污泥在300-700℃下热解后分配于生物炭中的w（PAHs）分别为116.8-1 807和136.3-52 015μg/kg,分配于生物油中的w（PAHs）分别为10 612-33 402和11 077-116 673μg/kg.生物炭和生物油中以低环PAHs（2环-4环）为主,其所占比例分别为90.8%-99.6%和97.9%-99.5%.大部分PAHs分配于生物油相,生物炭中PAHs的残留量较小,其中,5环PAHs是生物炭和生物油中苯并[a]芘毒性当量浓度（TEQBa P）的主要贡献者.
Corn stalks and municipal sludge were selected as feedstocks and pyrolyzed under anaerobic conditions at 300,500 and700 ℃. The generation,compositional distribution and toxicity characteristics of PAHs in both biochars and bio-oils were investigated.The results showed that when produced between 300 and 700 ℃,PAHs contents were 116. 8-1,807 μg/kg in corn stalk-based biochar and136. 3-52,015 μg/kg in municipal sludge-based biochar. Whereas,PAHs contents were 10,612-33,402 μg/kg in corn stalk-derived biooils and 11,077-116,673 μg/kg in municipal sludge-derived bio-oils. Light molecular weight（ 2-4 rings） were dominant in PAHs components,accounting for 90. 8% to 99. 6% in biochars and 97. 9% to 99. 5% in bio-oils. Most PAHs were allocated in the bio-oil phase and only a small proportion existed in the carbon material. Five-ring PAHs were the major contributors to the toxic equivalency of Ba P（ TEQBa P） of biochars and bio-oils.
出处
《环境科学研究》
EI
CAS
CSSCI
CSCD
北大核心
2016年第11期1651-1658,共8页
Research of Environmental Sciences
基金
国家自然科学基金项目(51309214)
中国科学院科技服务网络计划项目(KFJ-EW-STS-091)
