تعیین غلظت فلزات سنگین (سرب، کادمیوم، کروم) در منابع تأمین آب آشامیدنی در روستاهای شهرستان تربت‌حیدریه و توزیع آن با GIS

نوع مقاله: مقالات پژوهشی

نویسندگان

1 گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران.

2 گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تربت‌حیدریه، تربت‌حیدریه، ایران.

چکیده

زمینه و هدف: دسترسی به آب آشامیدنی سالم، یکی از شاخص‌های بهداشتی تعیین شده توسط سازمان جهانی بهداشت و مورد توجه مسئولین ذیربط جوامع مختلف می‌‌باشد، لذا مطالعه حاضر با هدف بررسی میزان فلزات سنگین و مقایسه آن با استانداردهای ملی و بین‌المللی انجام شد.
روش‌کار: در این مطالعه توصیفی - مقطعی نمونه‌های آب آشامیدنی بر اساس روش استاندارد از 41 منبع تأمین کننده اصلی آب شرب در روستاهای شهرستان تربت‌حیدریه تهیه و به آزمایشگاه ارسال شد. نمونه‌های مورد نظر با دستگاه جذب اتمی کوره گرافیت AA240FS مورد آنالیز قرار گرفت. در نهایت داده‌ها با استفاده از نرم‌افزار Arc-GIS v10.3 و Excel v.2010 مورد تجزیه و تحلیل قرار گرفتند.
یافته‌ها: میانگین غلظت فلزات کادمیوم، سرب و کروم در چاه‌های آب شرب مناطق روستایی شهرستان تربت‌حیدریه به ترتیب 0/17±0/59، 1/7±1/8 و 33/4±33/5 میکروگرم در لیتر و در محدوده استاندارد بود. اما حداکثر غلظت فلز کروم در 11 روستا بیشتر از مقدار مجاز تعیین شده سازمان جهانی بهداشت و استاندارد ملی بود.
نتیجه‌گیری: میانگین غلظت فلزات اندازه‌گیری شده در بیشتر چاه‌های مورد بررسی روستاهای تربت‌حیدریه پایین‌تر از مقدار مجاز تعیین شده سازمان جهانی بهداشت می‌باشد، اما در مناطقی که حداکثر غلظت این فلزات بالاتر از حد مجاز تعیین شده می‌باشد، پیشنهاد می‌شود مطالعه‌ای در خصوص تعیین بیماری‌های مرتبط با این فلزات و مطالعه‌ای جامع‌تر در فصول کم‌آبی و پر‌آبی انجام شود.

کلیدواژه‌ها


عنوان مقاله [English]

Determination of the heavy metals concentrations (lead, Cadmium, Chromium) in rural drinking water supplies of Torbat Heydariyeh city and distribution of GIS

نویسندگان [English]

  • Majid Mirzabeygi 1
  • Abbas Abbasnia 1
  • Mojtaba sajadi 1
  • Javad Salimi 2
  • Mojtaba sajadi 1
  • Esmail harasi 1
  • Amir Hossein Mahvi 1
1 Department of Environmental Health Engineering, School of public Health. Tehran University of Medical Science, Tehran, Iran
2 Department of Environmental Health Engineering, School of public Health. Torbat Heydariye University of Medical Science, Torbat Heydariye, Iran.
چکیده [English]

Background & Objective: Having an access to safe drinking water, which is considered as one of the health indicators by World Health Organization (WHO), has great importance for relevant authorities of different communities. Thus this study aimed to determine amounts of heavy metals and compare them with national and international standards.
Materials & Methods: In this cross sectional study, drinking water samples were taken from 41 main drinking water supplies in villages of Torbat-e Heydariyeh city according to the standard method and  transferred to the laboratory. These samples were analyzed by mean of atomic absorption spectrophotometer (AA240FS).Finally, obtained data were analyzed using Arc-GIS (v. 10.3) and excel (v.2010) softwares.
Results: The attained results revealed that the mean concentrations of metals including Cadmium, lead and Chromium were (0.59±0.17), (1.8±1.7) and (33.5±33.4) mg/l, respectively, in drinking water wells of rural regions of Torbat-e Heydariyeh . These amounts were in optimal ranges. While chromium concentrations were more than recommended permissible levels of WHO and national standards in 11 villages.
Conclusion: The mean concentrations of measured metals were lower than the recommended permissible levels by WHO in more cases of considered wells in villages of Torbat-e Heydarieh=. However, forregions in which the concentrations of heavy metals do not meet the standards, a comprehensive study is recommended to determine the heavy metal-related diseases in dry and wet seasons.

کلیدواژه‌ها [English]

  • Heavy metals
  • Drinking water
  • GIS
  • Torbat Heydariyeh
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