...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Soil Science >Influence of Activated Carbon and Other Additives on Bioremediation Rate and Characteristics of Petroleum-Contaminated Soils
【24h】

Influence of Activated Carbon and Other Additives on Bioremediation Rate and Characteristics of Petroleum-Contaminated Soils

机译：活性炭和其他添加剂对石油污染土壤生物化率和特征的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The main objective of this research was to study remediation of petroleum-contaminated soils after treating with granular activated carbon (AC) in combination with diatomite and a biopreparation (BP). Bioremediation rate and properties of petroleum-contaminated soils were used to explore associated mechanisms. Experiments were conducted under microfield conditions with three types of soils surficially contaminated with crude oil followed by weathering. Soil samples were amended with BP and two doses of AC (in combination or separately) or with diatomite alone (D) and mixed with AC (ACD). Natural attenuation decreased the concentration of total petroleum hydrocarbons (TPH) in the soils (initially 28-29 g kg(-1)) by 50% at 2 and 72% at 13 months. More efficient reduction of TPH (by 81% at 2 and 85% at 13 months) was achieved during the same period via in situ bioremediation by activating indigenous petroleum degraders, whereas the impact of BP alone was negligible. Soil amendment with the ACD mixture produced the best results; TPH content was reduced by 90% at 2 and 92% at 13 months, and soil phytotoxicity was low during most of the incubation period. Results demonstrated the potential of ACD as an adsorbent for accelerated bioremediation of petroleum-contaminated soils. Addition of the ACD mixture creates better conditions for degrading microorganisms and plant growth due to reversible adsorption of toxic petroleum components and metabolites, an increase in soil water-holding capacity, and total porosity, as well as a liming effect, increased plant resistance to abiotic stress in the presence of ACD, and better availability of compounds adsorbed to AC in the presence of diatomite.
机译：本研究的主要目的是在用粒状活性炭（AC）与硅藻土和生物加工（BP）组合后研究石油污染土壤的修复。石油污染土壤的生物修复率和性质用于探索相关机制。实验在微饰条件下进行，用三种类型的土壤污染原油，随后是风化的。将土壤样品用BP和两剂AC（组合或分开）或单独使用硅藻土（D）并与AC（ACD）混合。自然衰减降低了土壤中总石油烃（TPH）的浓度（最初28-29g kg（-1））在13个月的2％和72％的下降50％。通过激活土着石油降解剂，在同一时期通过原位生物化在同一时期实现TPH（在13个月内为2和85％，在2和85％时达到81％），而单独的BP的影响是可忽略不计的。具有ACD混合物的土壤修正案产生了最佳效果;在13个月，TPH含量在2和92％下减少90％，在大多数培养期间，土壤植物毒性低。结果表明ACD作为加速石油污染土壤生物修复的吸附剂的潜力。由于有毒石油成分和代谢物的可逆吸附，土壤水持量和总孔隙率的增加，添加了ACD混合物的添加产生了更好的降解微生物和植物生长条件，以及对生物造成的植物抵抗力增加在ACD存在下应力，并且在硅藻土存在下更好地吸附到Ac中的化合物。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号