خاک شناسی-آلودگی خاک -آلودگی هوا- دستورکارخاکشناسی


+ Copper and cobalt concentrations in soil and plants in an industrial region

 

Hoodaji, M.; Tahmourespour, A.; Amini, H

 

The input of heavy metals in soils through steel plant's production processes is one of the most important soil pollution sources. The aim of this study was to determining Cu and Co concentrations in soil and plants shoots around the Esfahan Steel Company. In this study, we separated 17 zones based on soil maps and marked 54 points for soil sampling. In each point were sampled at 0-5, 5-10, 10-20 and 20-40 cm depths and DTPA-extractable concentrations of Cu and Co were determined. Also 162 plant samples from shoots of 13 main plants species were collected and the concentrations of Cu and Co were determined. The results showed that, the maximum concentrations of Cu were 9.2, 7.4, 5.9 and 7.5 mg/kg.soil respectively in 0-5, 5-10, 10-20 and 20-40 cm layers. The maximum concentrations of Co were 2.4, 2, 1.8 and 2.3 mg/kg.soil respectively in 0-5, 5-10, 10-20 and 20-40 cm layers. Therefore the concentrations of Cu and Co in soil were less than the maximum permitted concentrations (MPC) of these elements in agricultural soils. The maximum concentrations of Cu in shoots of Triticum vulgare, Medicago sativa, Amygdalus scoparia and Oryza sativa were 21.8, 21.2, 21 and 20.3 mg/kg.dry. matter that were higher than the standard levels of Cu in plant dry matter. The maximum concentrations of Co in shoots of Medicago sativa, Vitis vinifera, Euphorbia spp. and Tamarix spp. were 12.7, 11.3, 10.3 and 10.2 mg/kg.dry. matter that were extremely higher than the standard levels of Co in plant dry matter. Therefore high concentrations of Cu and Co in the studied plants may arise from atmospheric pollution.

نویسنده : حسین امینی ; ساعت ۳:۳٠ ‎ب.ظ ; ۱۳٩٠/۱/۱٧
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