Paper Information

Journal:   JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY   FALL 2007 , Volume 9 , Number 3 (34 SPECIAL ISSUE); Page(s) 217 To 227.
 
Paper: 

THE EVALUATION OF ENVIRONMENTAL CONTAMINATION OF HEAVY METALS OF CD, PB AND HG IN INDUSTRIAL ZONES (CASE STUDY: SOME OF KERMAN PROVINCE'S INDUSTRIAL ZONE

 
 
Author(s):  MOZAFARI HOSSEIN*, MANOUCHEHR KALANTARI KH., SALARI HASAN, TORKZADEH M.
 
* INTERNATIONAL CENTER FOR SCIENCE, HIGH TECHNOLOGY & ENVIRONMENTAL SCIENCES (ICST), KERMAN
 
Abstract: 

In recent research, for evaluation of effects of industrial zones on environmental heavy metals content, we carried out taking samples from soil, plants and industrial wastewater in six industrial zones of Kerman province (including of Cement and Barez Tire factories, Sarcheshmeh Copper Complex, CSP, Industrial Zone NO.1 and Khazra Industrial Zone) and a non industrial zone (control). After sampling and sample preparation, pH of soil and industrial wastewater was measured with pH meter device and three heavy metals (Cd, Pb and Hg) content of soil were determined with acid digestion and atomic absorption method in total samples. The data was analyses by one-way ANOVA method (SPSS 10.0 software) statistically. The results shown that pH of soil and industrial wastewater in Sarcheshmeh Copper Complex zone decreased significantly when compared with other zones and control (pH of soil samples were all most close with the critical range of pH=5). In addition, the lead content (700 ppm approximately) in total samples of Industrial Zone NO.1 and CSP increased comparing with other zones and control significantly. The Cd and Hg content of samples increased in Sarcheshmeh Copper Complex, CSP and Barez Tire factory zones than other zones and control remarkably. Totally, the concentration of these two heavy metals in samples from latter three industrial zones increased than other zones, control and EPA standards significantly. This shows that there is relative contamination of heavy metals in these zones. This increasing of heavy metals content indicates that there are essential conditions for releasing of these elements from soil particles. Therefore, the industrial contaminant cause increasing hydrogen ions of soil and decreasing soil pH slowly. Accordingly, probability of toxicity and releasing of recent elements increases in agricultural and residential regions. Therefore, we should concern on controlling, evaluation and management on this important environmental problem.

 
Keyword(s): HEAVY METALS, ENVIRONMENTAL TOXICITY, SOIL ACIDITY, EPAS STANDARDS
 
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