بررسی غلظت فلزات سنگین در منابع آب با استفاده از روش‌های مختلف زمین‌آمار- منطقه مورد مطالعه دشت آستانه

نوع مقاله : مقاله پژوهشی

نویسنده

کارشناس‌ارشد گروه محیط‌زیست، دانشکده محیط‌زیست، دانشگاه تهران، تهران، ایران

چکیده

منابع آب‌های زیرزمینی از با ارزش‌ترین منابع ملی، و حفاظت از کیفیت آن حیاتی است. یکی از راه‌های مناسب برای جلوگیری از آلودگی آب‌های زیرزمینی بررسی تغییرات مکانی کیفیت آن‌ها و مدیریت بهره‌برداری از منابع آب و کاربری زمین است. از منظر دقت و اثر درون‌یابی و منشأ، این پژوهش مقایسه‌ای بین روش‌های درون‌یابی OK، RBF و IDW برای غلظت عناصر Pb، Zn و Cd را در منطقه مطالعاتی دشت آستانه تحلیل می‌کند. همچنین اختلاف دقت و عدم قطعیت درون‌یابی و منشأ آلودگی تجزیه و تحلیل شد و نتایج به دست آمده نشان می‌دهد بر اساس توزیع مکانی عناصر، آلوده‌ترین منطقه در جنوب شرقی محدوده در اطراف معدن زغال‌سنگ و سنگ مرمر که در منطقه حفاظت‌شده سیاه‌رود می‌باشد، قرار دارد. از جنوب منطقه به سمت شمال منطقه آلودگی کمتر شده و کمترین مقدار آلودگی در شمال منطقه و نزدیک پارک ملی بوجاق و دریاچه خزر می‌باشد. با توجه به استانداردهای WHO می‌توان دریافت که برای Zn، تمام منطقه محدوده مجاز WHO قرار دارد که حد استاندارد آن mg/L ۱۵ می‌باشد و حداکثر Zn در منطقه mg/L ۱٫۶۴ می‌باشد. برای Pb فقط مناطق کوچک در شمال منطقه در محدوده مجاز قرار دارد. برای Cd مقدار حد مجاز استاندارد جهانی mg/L ۰٫۰۰۳ می‌باشد که با توجه به توزیع مکانی آن تمام منطقه آلوده به این عنصر می‌باشد. عدم‌اطمینان بالاتر عناصر در درجه اول در اطراف معادن توزیع شده است که مربوط به تنوع مکانی عناصر سمی ناشی از دخالت انسان است. علاوه بر فعالیت معدن‌کاری، می‌توان ورود فاضلاب و پساب‌های صنعتی و شهری به منابع آب زیرزمینی را علت آلودگی آب منطقه مورد مطالعه دانست.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation of Heavy Metal Concentrations in Water Resources Using Different Geostatistical Methods - Astana Plain Study Area

نویسنده [English]

  • Alireza Ahmadi
M.Sc, Department of Environment, Faculty of Environment, University of Tehran, Tehran, Iran
چکیده [English]

Groundwater resources are one of the most valuable national resources, and the protection of its quality is vital. One of the best ways to prevent groundwater pollution is to study the spatial changes in their quality and manage the utilization of water resources and land use. In terms of accuracy and effect of interpolation and origin, this study analyzes a comparison between OK, RBF and IDW interpolation methods for Pb, Zn and Cd . Also, the difference between the accuracy and uncertainty of interpolation and the source of pollution was analyzed and the results show that based on the spatial distribution of elements in the most polluted area in the southeast of the area around the coal and marble mine in the conservation area. Has been blacked out. Pollution has decreased from the south to the north of the region and the lowest amount of pollution is in the north of the region and near Bojagh National Park and Caspian Sea. According to WHO standards, it can be seen that for Zn, the whole area is within the WHO allowable range, the standard limit is 15 mg / L and the maximum Zn in the area is 1.64 mg / L. For Pb only small areas in the north of the area are within the allowable range. For Cd, the permissible limit of the global standard is 0.003 mg / L, which due to its spatial distribution, the whole area is contaminated with this element. Higher uncertainty of the elements is primarily distributed around the mines, which is related to the spatial diversity of toxic elements caused by human intervention. In addition to mining activities, the entry of industrial and municipal wastewater and effluents into groundwater resources can be considered as the cause of water pollution in the study area.

کلیدواژه‌ها [English]

  • Groundwater
  • Interpolation
  • Quality
  • Industrial effluents
  • Uncertainty
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