The Effect of Montmorillonite Nano-Clay on theChanges in Petroleum Hydrocarbon Degradationand Cd Concentration in Plants Grown in Cd-Polluted Soil

Avicenna Journal of Environmental Health Engineering

Mehran Keshavarzi¹  Amir Hossein Baghaie² 

[1] Department of Agronomy and Plant Breeding, Faculty of Agriculture, Isfahan University of Technology, Isfahan, Iran;Department of Soil Science, Arak Branch, Islamic Azad University, Arak, Iran;

关键词: Petroleum;    Hydrocarbons;    Cadmium;    Adsorption;   

DOI  :  10.15171/ajehe.2018.13

来源: DOAJ

【 摘 要 】

Contamination with heavy metals and petroleum hydrocarbons is considered as an environmentalproblem. Thus, this research was done to evaluate the effect of montmorillonite nano-clay on thechanges in petroleum hydrocarbon degradation and cadmium (Cd) concentration in plant grown ina Cd-polluted soil. Treatments consisted of two levels of montmorillonite nano-clay (0 and 1% W/W)in a Cd-polluted soil (0, 5, 10 mg Cd/kg soil) and crude oil-polluted soil (0, 1 and 2% W/W). Theplant used in this study was Tall Fescue (Festuca arundinacea L.). After 20 weeks, the concentration ofCd in plants was measured by atomic absorption spectroscopy and the total petroleum hydrocarbon(TPHs) in the soil was determined using the GC-mass spectrometry. Soil respiration was determinedaccording to the method used by Qiao et al. ANOVA was used for statistical analysis of data. Theleast significant difference (LSD) test was used to determine the differences between the means.The application of 1% (w/w) montmorillonite nano-clay in Cd-polluted soil (10 mg Cd) withoutcrude oil decreased Cd concentration in plant and increased microbial respiration by 18% and 34%,respectively. In addition, the application of 1% montmorillonite nano-clay in soil polluted with 1%crude oil and 10 mg Cd enhanced TPHs degradation by 27%. The use of montmorillonite nano-clayincreased Cd adsorption in soil which resulted in an increase in microbial respiration and, hence thedegradability of petroleum hydrocarbon in the soil.

【 授权许可】

Unknown