نوع مقاله: علمی پژوهشی
نویسندگان
1 دانش آموخته واحد علوم و تحقیقات دانشگاه آزاد اسلامی
2 موسسه تحقیقات شیلات ایران
3 امور محیط زیست منطقه ویژه اقتصادی پتروشیمی ماهشهر
4 گروه شیلات، دانشگاه آزاد اسلامی واحد بابل
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
Zangi Creek is located in the Northwest of Persian Gulf, a branch of Moosa Creek. Zangi creek is important for aquatic animal’s diversity and richness. After establishing the Petrochemical special Economic Zone (PETZONE) in 1997 near the Zangi Creek, sludge and effluent was released in this sensitive ecosystem. A survey of the creek was performed, assessing macrobenthic density lead, cadmium heavy metals, total organic matter, and Grain size of sediments, pH, temperature and salinity in winter and summer 2006. Benthos abundance was assessed per square meter in laboratory after washing sediments with 500 micron standard sieve. Samples were transferred to laboratory in 4°C and analyzed by atomic absorption according to the related standards. It was found that minimum and maximum levels of Cadmium in water ranged from 0.07~0.12 ppm and in sediments ranged from 1.68~2.88 ppm, Lead levels in water ranged from 0.19~0.29 ppm and in sediments ranged from 1.43~7.31 ppm. Results showed that the distinct creek was more polluted than eastern part with high levels of Cd, Pb, pH and low levels of salinity. The physico-chemical changes such as pH and salinity were significantly correlated to metals in sediments (P<0.01). Although Macrobenthos density was very low at discharge area but density didn't have a significant correlation with metals (P<0.05).
کلیدواژه‌ها [English]
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