| 热解制备玉米秸秆和城市污泥生物炭过程中PAHs的污染特征 |
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| 引用本文： | 罗飞,宋静,陈梦舫.热解制备玉米秸秆和城市污泥生物炭过程中PAHs的污染特征[J].环境科学研究,2016,29(11):1651-1658. |
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| 作者姓名： | 罗飞 宋静 陈梦舫 |
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| 作者单位： | 1.中国科学院南京土壤研究所, 中国科学院土壤环境与污染修复重点实验室, 江苏 南京 210008 ;深圳市环境科学研究院, 广东 深圳 518001 |
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| 基金项目： | 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) |
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| 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136.3～52 015 μg/kg,分配于生物油中的w(PAHs)分别为10 612～33 402和11 077～116 673 μg/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芘毒性当量浓度(TEQBaP)的主要贡献者.
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| 关 键 词： | 生物炭 生物油 PAHs 组成特征 |
| 收稿时间： | 2016/4/17 0:00:00 |
| 修稿时间： | 2016/7/15 0:00:00 |
Characterization of Polycyclic Aromatic Hydrocarbons during the Production of Biochars from Pyrolysis of Corn Stalk and Municipal Sludge |
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| Affiliation: | 1.Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China ;Shenzhen Academy of Environmental Sciences, Shenzhen 518001, China2.Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China |
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| Abstract: | Corn stalks and municipal sludge were selected as feedstocks and pyrolyzed under anaerobic conditions at 300, 500 and 700 ℃. 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 and 136.3-52,015 μg/kg in municipal sludge-based biochar. Whereas, PAHs contents were 10,612-33,402 μg/kg in corn stalk-derived bio-oils 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 BaP(TEQBaP) of biochars and bio-oils. |
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