In-Situ Bioremediation of DDTs and PAH Contaminated Aging Farmland Soil Using Blood Meal |
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Authors: | Hui Wang Xiaoxu Wang Chunyue Liu Yinggang Wang Luoge Rong |
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Affiliation: | Key Laboratory of Regional Environmental and Eco-Remediation, Ministry of Education, Shenyang University, Shenyang, People's Republic of China |
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Abstract: | The use of blood meal was studied for in-site bioremediation of contaminated farmland soil. The combination of blood meal and indigenous microorganisms helped to in-site remediate the combined contaminated aging farmland soil of DDTs and PAH in Shenyang, China. The concentration of DDTs and PAHs was 47.94 ± 0.63 μg/kg and 690.10 ± 5.16 μg/kg, respectively. Biostimulation using blood meal or glucose promoted the bioremediation rate of DDTs and PAHs. Compared to glucose, blood meal was a longer term repair additive of DDTs and PAHs, and the remediation result was more efficient and durable. In the blood meal treatment, plowing the soil once every 7 days could increase the soil enzyme activities and bacterial populations, and it could significantly promote the remediation rates of DDTs (P < 0.05) and more evidently promote the remediation rates of PAHs. The DDTs and PAHs remediation rates increased from 32.18% and 20.17% to 43.41% and 26.09%, respectively, in soil treated with blood meal and plowed weekly after the five month remediation. This study provides an highly efficient in-site farmland soil bioremediation technology that could have practical utility. |
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Keywords: | DDTs PAHs blood meal biostimulation aged contaminated farmland soil field test |
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