نشریه علوم زمین خوارزمی

نشریه علوم زمین خوارزمی

ارزیابی کیفیت آب و فرآیندهای هیدروژئوشیمیایی در مجاورت محل دفن زباله‌های شهری؛ مطالعه موردی: لندفیل محمد آباد قزوین- ایران

نویسندگان
عطا شاکری
ندا شرفی
میثم رستگاری مهر
لیلا عبدالله بگلو
دانشگاه خوارزمی
10.22034/KJES.2025.11.1.107782
چکیده
مطالعه حاضر با بررسی پارامترهای فیزیکی و شیمیایی آب، کیفیت آب زیرزمینی را در نزدیکی محل دفن زباله‌های جامد شهری محمدآباد واقع در قزوین، ایران ارزیابی می‌کند. پارامترهای فیزیکیوشیمیایی، یون‌های اصلی و فلزات سنگین آب، با به کارگیری شاخص‌هایی مانند شاخص کیفیت آب (WQI) مورد بررسی قرار گرفتند. در فصل مرطوب، غلظت کلرید (339/8 میلی‌گرم در لیتر)، سولفات (365 میلی‌گرم در لیتر) و سدیم (268/7 میلی‌گرم در لیتر)، و همچنین هدایت الکتریکی (EC) با میانگین ۱۳۰۳۵ میکروسیمنس بر سانتی‌متر و کل جامدات محلول (TDS) با میانگین 9338/1 میلی‌گرم در لیتر به طور قابل‌توجهی بالاتر از حد مجاز WHO و EPA بود. در فصل تر، غلظت برخی فلزات سنگین نظیر Pb و Ni به ترتیب با میانگین 23/7 میکروگرم بر لیتر و 49/3 میکروگرم برلیتر، فراتر از استانداردهای WHO بود. با‌این‌حال در فصل خشک، غلظت فلزات کاهش یافت، اما در چاه‌های پایشی میانگین غلظت فلزات سنگین به ترتیب Fe >Zn >Pb > Mn >As >Ni > Hg فراتر از حد مجاز WHO و EPA بود. نتایج WQI نشان داد که 27/5% نمونه‌ها در فصل تر و 8% نمونه‌ها در فصل خشک، کیفیت نامناسبی برای آشامیدن داشتند. کیفیت آب در ایستگاه‌های نزدیک به لندفیل در هر دو فصل در بدترین وضعیت قرار داشت. نتایج حاصل از نمودارهای پایپر و گیبس نشان می‌دهد که تیپ غالب آب در منطقه از نوع کلرو-سولفاته است و فرآیند تبخیر و تماس آب زیرزمینی با رسوبات تبخیری، نقش اصلی را در تعیین کیفیت آب ایفا می‌کنند.
کلیدواژه‌ها
آب زیرزمینی
هیدروشیمی
لندفیل
فلزات سنگین
شاخص کیفیت آب

عنوان مقاله English

Assessment of water quality and hydrogeochemical processes in proximity to a municipal landfill site: case study of the Mohammadabad Landfill, Qazvin, Iran

نویسندگان English

Ata Shakeri
Neda Sharafi
Meisam Rastegari Mehr
Leyla Abdollahbeglou
Kharazmi University
چکیده English

This study evaluates the groundwater quality near the Mohammadabad municipal solid waste landfill in Qazvin, Iran, by examining the physical and chemical parameters of the water. The physicochemical parameters, major ions, and heavy metals in the water were investigated using indices such as the Water Quality Index (WQI). In the wet season, the concentrations of chloride (339.8 mg/L), sulfate (365 mg/L), and sodium (268.7 mg/L), as well as electrical conductivity (EC) with an average of 13035 µS/cm and total dissolved solids (TDS) with an average of 9338.1 mg/L, were significantly higher than the permissible limits of WHO and EPA. In the wet season, the concentrations of some heavy metals such as Pb and Ni exceeded WHO standards, averaging 23.7 µg/L and 49.3 µg/L, respectively. However, in the dry season, metal concentrations decreased, although in the monitoring wells, the average levels of heavy metals in the order of Fe > Zn > Pb > Mn > As > Ni > Hg still exceeded the permissible limits of WHO and EPA. Water Quality Index (WQI) results showed that 27.5% of the samples in the wet season and 8% in the dry season had unsuitable quality for drinking purposes. The stations located near the landfill exhibited the poorest water quality in both seasons. The results from Piper and Gibbs diagrams indicated that the dominant water type in the area is chloro-sulfate, and processes such as evaporation and interaction with evaporitic sediments play a major role in shaping the groundwater chemistry.

کلیدواژه‌ها English

groundwater
Hydrochemistry
landfill
Heavy metals
Water Quality Index
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