Goi Anna, Kulik Niina, Trapido Marina
Department of Chemical Engineering, Tallinn University of Technology, Estonia.
Chemosphere. 2006 Jun;63(10):1754-63. doi: 10.1016/j.chemosphere.2005.09.023. Epub 2005 Nov 15.
Combined chemical (Fenton-like and ozonation) and biological treatment for the remediation of shale oil and transformer oil contaminated soil has been under study. Chemical treatment of shale oil and transformer oil adsorbed in peat resulted in lower contaminants' removal and required higher addition of chemicals than chemical treatment of contaminants in sand matrix. The acidic pH (3.0) conditions favoured Fenton-like oxidation of oil in soil. Nevertheless, it was concluded that remediation of contaminated soil using in situ Fenton-like treatment will be more feasible at natural soil pH. Both investigated chemical processes (Fenton-like and ozonation) allowed improving the subsequent biodegradability of oil. Moderate doses of chemical oxidants (hydrogen peroxide, ozone) should be applied in combination of chemical treatment (both, Fenton-like or ozonation) and biotreatment. For remediation of transformer oil and shale oil contaminated soil Fenton-like pre-treatment followed by biodegradation was found to be the most efficient.
联合化学（类芬顿和臭氧化）与生物处理修复页岩油和变压器油污染土壤的研究正在进行。对吸附在泥炭中的页岩油和变压器油进行化学处理，与对砂质基质中的污染物进行化学处理相比，污染物去除率较低，且需要添加更多的化学药剂。酸性pH值（3.0）条件有利于土壤中石油的类芬顿氧化。然而，得出的结论是，在自然土壤pH值下，采用原位类芬顿处理修复污染土壤将更可行。所研究的两种化学过程（类芬顿和臭氧化）都能提高油的后续生物降解性。在化学处理（类芬顿或臭氧化）与生物处理相结合时，应使用适量的化学氧化剂（过氧化氢、臭氧）。对于变压器油和页岩油污染土壤的修复，发现先进行类芬顿预处理再进行生物降解是最有效的。
