猪粪和骨炭对原油污染土壤的生物修复研究

E. Ugwoha, V. E. Amah, Gabriel Obiosabofu Oweh
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引用次数: 3

摘要

石油开采作业以及设备故障和基础设施破坏造成了严重的环境污染,原油泄漏在世界范围内。污染场地的修复是一个亟待解决的环境问题。在本研究中,研究了猪粪和猪骨炭混合物(生物刺激素)在土壤中促进和优化原油生物降解的可能性。500克壤土中加入了3% (w/w)的原油。用不同百分比的生物刺激素混合剂对尖刺土进行改性,并标记为A - e。不含生物刺激素的尖刺土作为对照。每个实验设置六(6)个重复,进行六周,并每周破坏性取样和分析。生物刺激和非生物刺激土壤的去除率分别为66.70% ~ 86.70%和3.69%。生物刺激和非生物刺激土壤的一级降解速率常数分别为0.1978 ~ 0.3391和0.0050。研究发现,含50%骨炭和50%猪粪的生物刺激土壤C对总石油烃(TPH)的去除效果最佳。生物刺激土壤A、B、D和E的结果表明,猪粪便比猪骨炭具有更有效的生物刺激作用。一级动力学模型充分预测了最佳生物刺激剂对TPH的去除。综上所述,利用猪粪、猪骨炭等农业有机废弃物以1:1的比例处理原油污染土壤是一种简单、有效、经济、环保的解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Bioremediation of Crude Oil Contaminated Soil Using Pig Droppings and Bone Char
Oil extraction operations as well as equipment failure and infrastructure vandalism have caused serious environmental pollution with crude oil spills world-wide. The remediation of the polluted sites is an environmental problem beckoning for solution. In this study, the possibility of pig droppings and pig bone char mixture (biostimulant) to stimulate and optimize crude oil biodegradation in soil was investigated. Exactly 500g of loamy soil was spiked with 3% (w/w) of crude oil. The spiked soil was amended with varying percentage mixtures of the biostimulant and labelled A – E. The spiked soil without biostimulant served as the Control. Each experiment was setup in six (6) replicates, carried out for six weeks, and destructively sampled and analysed on a weekly basis. The removal efficiencies of the biostimulated and unbiostimulated soils were observed to range from 66.70 to 86.70% and 3.69%, respectively. The biodegradation first-order rate constants ranged from 0.1978 to 0.3391wk-1 and 0.0050wk-1 for the biostimulated and unbiostimulated soils, respectively. Optimum removal of total petroleum hydrocarbon (TPH) was observed for biostimulated soil C comprising 50% bone char and 50% pig droppings. Results from biostimulated soils A, B, D and E indicated that pig droppings is a more effective biostimulant than pig bone char. A first-order kinetic model adequately predicted the removal of TPH with the optimum biostimulant. It is concluded that using agro-organic waste materials such as pig droppings and pig bone char in a ratio of 1:1 can offer a simple, effective, inexpensive and environmentally friendly solution to the problem of soil contamination with crude oil.
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