Microbial exposure risk assessment of urban wastewater by irrigation of agricultural products
کد مقاله : 1075-IWWA
یداله غفوری *1، احمدرضا یاری2، رحیم عالی3، محمدرضا خاکسار4
1مرکز تحقیقات آلاینده های محیطی دانشگاه علوم پزکی قم
2دانشیار مهندسی بهداشت محیط. گروه بهداشت محیط، دانشکده بهداشت. مرکز تحقیقات آلاینده‌های محیطی. دانشگاه علوم پزشکی قم
3کیفیت آب و فاضلاب/دکترای تخصصی بهداشت محیط مرتبه علمی : استادیار دانشگاه علوم پزشکی و خدمات بهداشتی درمانی قم
4گروه بهداشت حرفه ای دانشگاه علوم پزشکی قم
چکیده مقاله:
This study was designed to investigate microbial exposure risk assessment and consequences of adverse health effects due to the use of irrigation of fields with wastewater in Qom province Environmental monitoring program for 3 pathogens including Escherichia coli, Vibrio cholerae and Ecoli O157 in raw sewage and treated wastewater and irrigated products with wastewater, was performed. Results was shown that in the raw wastewater, concentrations of E.coli, Vibrio Cholerae and E.coli O157:H7, 3.4×103 ± 500, 2.1×103 ± 100 and 312 respectively were determined. Concentrations of E.coli, Vibrio Cholerae and E.coli O157:H7 in wastewater effluent 2.1×103 ± 100, 0.8×103 ± 100 and 176 respectively were determined. Based on these findings, it is determined that the conventional wastewater treatment system has been effective in removing E.coli, Vibrio Cholerae and E.coli O157: H7 by 50%, 59% and 43%, respectively. Irrigated crops with wastewater effluent containing 400 ± 250, 0.1×103 ± 0.019 and 52 for E.coli, Vibrio Cholerae and E.coli O157:H7 respectively were measured. In this study according to the exposure scenarios including accidental drinking, food crop consumption, dermal contact by wastewater effluent and dermal contact by raw wastewater, total annual Probability of infection in studied population for E.coli, Vibrio Cholerae and E.coli O157:H7, 8×10-2, 8×10-4 and 0.17 respectively was determined. Implementing of wastewater safety plans (WWSP) to safeguard wastewater quality, raising awareness in the population in contact with urban wastewater and upgrading wastewater treatment plants is inevitable.
کلیدواژه ها:
Microbial, wastewater, Risk, Qom, irrigation, products
وضعیت : مقاله پذیرفته شده است