老化垃圾增强石油污染土壤的生物修复。
Bioremediation of petroleum-contaminated soil enhanced by aged refuse.
机构信息
Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China; School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China.
Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China.
出版信息
Chemosphere. 2019 May;222:98-105. doi: 10.1016/j.chemosphere.2019.01.122. Epub 2019 Jan 23.
In this study, the effect of aged refuse on biodegradation of total petroleum hydrocarbons (TPH), microbial counts, soil ecotoxicity, dehydrogenase activity and microbial community compositions were investigated in solid phase reactors during a 30-week period. The results demonstrate that the removal efficiency of TPH was significantly higher in the soil supplemented with aged refuse than in the soil without aged refuse. After 30 weeks, the removal efficiencies of TPH in soils were 29.3%, 82.1%, 63.7% and 90.2% in the cases of natural attenuation, nutrient addition (with NHNO and KHPO), supplement with 20% (w/w, dry weight basis) of aged refuse and the combination of nutrient and aged refuse. Nutrient plus aged refuse made the TPH concentration decrease to below the threshold level of commercial use required for Chinese soil quality for TPH (<3000 mg/kg) in 30 weeks. It was also found that dehydrogenase activity, bacterial counts and degrader abundance in the soil were remarkably enhanced by the addition of aged refuse (20%,w/w). Total organic carbon analysis demonstrates that large amounts of hydrocarbon intermediates occurred in the soil after bioremediation.
本研究采用固相反应器，研究了在 30 周的时间内，老化垃圾对总石油烃（TPH）的生物降解、微生物计数、土壤生态毒性、脱氢酶活性和微生物群落组成的影响。结果表明，添加老化垃圾的土壤中 TPH 的去除效率明显高于未添加老化垃圾的土壤。30 周后，在自然衰减、添加 NH4NO3和 KH2PO4（养分添加）、添加 20%（干重基础）老化垃圾和养分与老化垃圾组合的情况下，土壤中 TPH 的去除效率分别为 29.3%、82.1%、63.7%和 90.2%。养分加老化垃圾使 TPH 浓度在 30 周内降至中国土壤 TPH 质量商业用途的阈值以下（<3000mg/kg）。还发现，添加老化垃圾（20%，干重基础）显著提高了土壤中的脱氢酶活性、细菌计数和降解剂丰度。总有机碳分析表明，生物修复后土壤中出现了大量的烃类中间产物。
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