| 罗飞,宋静,陈梦舫.油菜饼粕生物炭制备过程中多环芳烃的生成、分配及毒性特征[J].农业环境科学学报,2016,35(11):2210-2215. |
| 油菜饼粕生物炭制备过程中多环芳烃的生成、分配及毒性特征 |
| Generation, distribution and toxicity characteristics of polycyclic aromatic hydrocarbons during the preparation of biochar from rapeseed cake |
| 投稿时间：2016-04-17 |
| DOI：10.11654/jaes.2016-0529 |
| 中文关键词: 生物炭，生物油，多环芳烃，毒性当量，环境安全 |
| 英文关键词: biochar, bio-oil, polycyclic aromatic hydrocarbons, toxic equivalency, environmental safety |
| 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(KFJ-EW-STS-091) |
|
| 摘要点击次数: 2200 |
| 全文下载次数: 2422 |
| 中文摘要: |
| 以油菜饼粕为原料，在300、500、700℃下进行缺氧慢速热解，研究生物炭和生物油中PAHs(多环芳烃)的生成、分配及毒性特征。结果表明：PAHs的生成量随热解温度升高而逐渐减少，在300~700℃下热解后分配于生物炭和生物油中的PAHs含量分别为42.7~1 460.8 μg·kg-1和5 799.9~53 151.0 μg·kg-1。生成的PAHs以低环(2环、3环、4环)为主，其在生物炭和生物油中所占比例分别为97.4%~98.8%和97.8%~99.0%。97%以上的PAHs分配于生物油相，生物炭中PAHs的残留量较低。5环PAHs是生物炭和生物油中苯并[a]芘毒性当量浓度(TEQBaP)的主要贡献者。较高温度条件下热解有利于降低PAHs的生成量及其潜在的致癌风险，可作为制备油菜饼粕生物炭的推荐工艺条件。 |
| 英文摘要: |
| In the present study, rapeseed cake was slowly pyrolyzed under anoxic conditions at 300, 500, and 700℃. The generation, distribution and toxicity characteristics of PAHs(polycyclic aromatic hydrocarbons) in both biochars and bio-oils were investigated. The results showed that the amount of generated PAHs decreased with increasing pyrolysis temperature. When produced between 300 and 700℃, PAHs concentrations ranged from 42.7 to 1 460.8 μg·kg-1 in biochars and from 5 799.9 to 53 151.0 μg·kg-1 in bio-oils, respectively. Light molecular weight PAHs(2 rings, 3 rings and 4 rings) were the dominant components, accounting for 97.4%~98.8% in biochars and 97.8%~99.0% in bio-oils. More than 97% of the PAHs mass were allocated in the bio-oil phase whereas only a small portion existed in the carbon material. 5 ring PAHs were the major contributors to the toxic equivalency of BaP(TEQBaP) of biochars and bio-oils. Higher temperature is recommended for production of biochars from rapeseed cake due to lower PAHs generation and lower potential cancer risk. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
