Characterization and bentonite amendment of oil contaminated soils

Wen-Ting Wang, Chen-Hong Wu, Yun‐Hai Wang, Jinglian Zhao
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Abstract

Bentonite has the advantages of strong hygroscopicity, expansibility, adsorptivity and adhesivity. It can ameliorate and reclaim soils. This research focused on the oil contaminated soils amendment by bentonite. The oil contaminated soils were characterized with different techniques and compared with the background soils to evaluate its contaminating level. The results indicated that the soils were heavily contaminated with oil and its ventilation, porosity and bioaccessibility were greatly affected. The addition of bentonite could affect the physical-chemical properties of soils and the possible mechanisms were discussed. It was demonstrated that bentonite addition could improve the soils water conservation, the air ventilation in soil and the sticky particles percentage. However, the pH increased a little by adding bentonite. The addition of bentonite could enhance the oil degradation.
油污染土壤的表征及膨润土改性
膨润土具有较强的吸湿性、膨胀性、吸附性和粘附性等优点。它可以改良和开垦土壤。研究了膨润土对石油污染土壤的修复作用。采用不同的技术对油类污染土壤进行表征,并与本底土壤进行比较,评价其污染程度。结果表明,油类污染严重,土壤的通气性、孔隙度和生物可达性受到较大影响。膨润土的加入会影响土壤的理化性质,并对其可能的机理进行了探讨。结果表明,添加膨润土可以提高土壤的保水能力、土壤的通风性和粘粒率。添加膨润土后,pH值略有升高。膨润土的加入对油的降解有促进作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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