Nano Fe-oxide and nano-hydroxyapatite can decrease the Cd uptake by plant in a soil treated with Cd-polluted sewage sludge
Publish Year: 1400
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JWENT-6-2_008
تاریخ نمایه سازی: 20 تیر 1400
Abstract:
Decreasing the heavy metals availability has important key factors in environmental studies. This research was done to investigate the effect of nano-Fe oxide and nano-hydroxyapatite (NHAP) on Cd uptake by plant that cultivated in the sewage sludge amended soil. Treatments consisted of applying Cd (۰, ۱۰ and ۲۰ mg Cd/kg)-polluted sewage sludge at the rates of ۰, ۱۵ and ۳۰ t/ha, nano-Fe oxide (۰ and ۰.۵ ppm) and NHAP (۰, ۰.۵ and ۱ % (W/W)). The plant in this experiment was pinto bean (Cv. Khomein). After ۹۰ days, the plants were harvested and the plant Zn, Cd and Fe concentration was measured using AAS. In addition, soil microbial respiration was calculated. Soil application of NHAP significantly increased the Zn and Fe concentration of the plants that cultivated in the soil which was amended with ۱۵ t/ha sewage sludge by ۱۲.۸ and ۱۴.۵%, respectively. However, the Cd concentration was decreased by ۱۷.۲%. Using ۱۵ and ۳۰ t/ha sewage sludge significantly increased the plant Zn and Fe by ۱۳.۱ and ۱۴.۶%, respectively. Foliar application of nano-Fe oxide ate the rate of ۱ ppm significantly decreased the plant Cd uptake by ۱۸.۳%. Using NHAP (۰.۵ % (W/W)) and sewage sludge (۳۰ t/h) significantly increased the soil microbial respiration by ۱۴.۲ and ۱۵.۳%, respectively. The results of this study showed that using organic amendments such as NHAP and sewage sludge or foliar application of nano-Fe oxide can affect in decreasing the heavy metal uptake by plants that is a positive point in environmental studies.
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Authors
Amir Hossein Baghaie
Department of Soil Science, Arak Branch, Islamic Azad University, Arak, Iran
Aminollah Aghilizefreei
Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran
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