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| 小麦秸秆生物炭对石油烃污染土壤的修复作用 |
| Remediation of Wheat-Straw-Biochar on Petroleum-Polluted Soil |
| Received:January 13, 2014 |
| DOI：10.13254/j.jare.2014.0013 |
| 中文关键词: 小麦秸秆;生物炭;裂解时间;性质;石油污染;修复 |
| 英文关键词: wheat straw;biochar;pyrolisis time;characteristics;petroleum pollution;remediation |
| 基金项目:博士点基金项目(博导类)(20120031110015);国家自然科学基金面上项目(31270544);“863”重大项目(2013AA06A205) |
| Author Name | Affiliation | E-mail | | ZHU Wen-ying | College of Environmental Science and Engineering, NanKai University, Tianjin 300071, China | tangjch@nankai.edu.cn | | TANG Jing-chun | College of Environmental Science and Engineering, NanKai University, Tianjin 300071, China
Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin 300071, China
Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin 300071, China | |
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| 中文摘要: |
| 以小麦秸秆为原材料,在300℃下缺氧裂解3、6、8 h制备生物炭,比较了3种生物炭的产率、pH值、灰分以及C、H、N元素含量,表征了300℃、6 h生物炭的表面形态,并用其作为修复材料,对大港油田的石油污染土壤进行修复。结果表明,随裂解时间的延长,生物炭产率下降,pH值升高,灰分含量增加,H/C值下降,但产率、pH值、灰分和H/C值都是从3 h到6 h差异显著,6 h到8 h差异不显著。C元素含量先升高后下降。石油污染土壤经生物炭修复14 d和28d后,总石油烃降解率分别为45.48%和46.88%,均显著高于对照组。修复14 d后土壤中的萘、苊、苯并[a]蒽、屈、苯并[b]荧蒽、苯并[k]荧蒽、苯并[a]芘、茚并[1,2,3-cd]芘也都有不同程度的下降,其中苯并[a]芘含量下降幅度达98.18%,其他几种PAH的降解率也都高于对照组,28 d后这些PAH的含量又有上升趋势。这说明小麦秸秆裂解时间对生物炭的性质有影响;300℃、6h生物炭可以用来修复石油污染的土壤。 |
| 英文摘要: |
| Biochar was made from wheat straw at 300 ℃ for 3, 6, 8 hours respectively. The productivity, pH, ash content and C, H, N content of these biochar were compared. The surface morphology of the 300 ℃-6 h biochar was characterized, and it was used to remediate the petroleum-polluted soil of Dagang oil field. Results showed that, as the extension of pyrolisis time, the productivity of biochar decreased, pH increased, ash content increased, H/C decreased. But productivity, pH, ash content and H/C changed significantly from 3 h to 6 h, unsignificantly from 6 h to 8 h. C content showed a downward trend after the first rise. After remediation of biochar for 14 and 28 days, the TPH degradation rate were 45.48% and 46.88% respectively, higher than control group. After 14 days remediation, content of naphthalene, acenaphthene, Benzo [a] anthracene, chrysene, Benzo [b] fluoranthene, Benzo [k] fluoranthene, Benzo [a] pyrene, Indene and [1,2,3-CD] pyrene were decreased to various degrees, with the Benzo [a] pyrene content decreased by 98.18%, and the degradation rate of other PAH higher than control group. After 28 days remediation however, content of these PAH showed a rising trend. It suggested that pyrolisis time had influence on biochar’ s characteristics, and 300 ℃-6 h biochar could be used to remediate petroleum-polluted soil. |
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