Groundwater quality in some areas of Sirte City, Libya
DOI:
https://doi.org/10.37375/susj.v14i2.3087الكلمات المفتاحية:
groundwater، water quality، heavy metals، physicochemical parameters، Libya، Sirte Cityالملخص
This study investigates groundwater quality in various areas of Sirte City, located in northern Libya, focusing on identifying the most prevalent pollutants. The research specifically examines pH levels and other key pollution indicators, including total dissolved solids (TDS), salinity, and electrical conductivity (EC) of the water. The study is centered on assessing the physicochemical parameters of groundwater in the Sirte City area. A total of twenty-eight surface water samples were collected from different directions (west, east, and south) around Sirte City during the Winter season, from January to March 2016. The overall findings revealed mean to all directions of water quality parameters as follows: pH 7.37, TDS 7419.9 mg/L, salinity 8.91 mg/L, EC 10.2 µS/cm, Na 225 mg/L, K 30.0 mg/L, and total hardness (TH) 11.4 mg/L. The results are shown for each direction separately, TDS 3324 mg/L in the south, 13663 mg/L in the west, and 5272 mg/L in the east. Similarly, the average salinity values ranged from 3.70 mg/L in the south, 16.2 mg/L in the west, to 6.80 mg/L in the east. The results further indicated that the average pH, conductivity, and metal concentrations were highest in the western wells of Sirte City compared to the eastern and southern wells. The average TH values were 6.57 mg/L in the south, 13.5 mg/L in the west, and 14.1 mg/L in the east. Additionally, the concentrations of heavy metals in the studied samples were below the detection limits of the measurement devices used. Notably, the lowest concentrations of heavy metals were found in the southern and middle-western regions, while the highest concentrations were observed in the eastern region. Furthermore, it was observed that the water samples from the western direction were the most saline, whereas those from the eastern and southern directions were less saline.The all results above were increasing than permissible limit According to World Health Organization specifications .
The results of this study suggest that all collected surface water samples from the Sirte region are natural and acceptable for livestock and agricultural use, as well as for cleaning purposes. However, simple treatment is necessary to make the water suitable for human consumption, particularly when compared to WHO and Libyan water quality standards.
المراجع
The results indicate that groundwater contamination is present in all areas surrounding the city of Sirte—extending towards the west, north, and south—up to approximately 15 kilometers from the city center. High concentrations of several measured elements were observed, along with physical properties that fall outside the permissible limits both locally and internationally. The quality of this water resembles that of surface water, tending towards salinity, and is currently used for irrigating certain agricultural crops and for livestock.
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الملخص العربي
تمت هذه الدراسة إلى مناطق حول مدينة سرت شمال ليبيا ، حيث تتدرس الملوثات الأكثر شيوعًا في المياه الجوفية، منها الأس الهيدروجيني ومؤشرات التلوث الأخرى مثل المواد الصلبة السائلة والملوحة والتوصيل الكهربائي للمياه. ركزت على تقييم البارامترات الفيزيائية الكيميائية للمياه الجوفية في منطقة مدينة سرت. تم أخذ 28 عينة مختلفة من المياه السطحية من اتجاهات مختلفة من مدينة سرت الغرب و الشرق و الجنوب) ، العينات التي تم جمعها في أشهر يناير إلى مارس 2016 خلال موسم الأمطار.
أظهرت النتائج أن بارامترات جودة المياه مع المتوسط كانت على النحو التالي: pH 7.37، TDS 7419.9 ملغم/لتر، الملوحة.8.91 ملغم/لتر، EC 10.2 ~ s/cm، Na+ 225 mg/L، K+ 30.0 mg/L و TH 11.4 mg/L. وكانت متوسط قيم TDS جنوب 3324 وغرب 13663وشرق 5272 ملغم/لتر، واضهرت النتائج أن متوسط قيم الملوحة تراوح جنوبًا 3.70. و غربا 16.2 و شرقا 6.80 . ملغم/لتر.و أظهرت النتائج أن متوسط قيم الأس الهيدروجيني والموصلية وتركيزات المعادن في غرب مدينة سرت كانت أعلى من القيم شرق وجنوب المدينة، وتراوحت متوسط قيم TH جنوبًا 6,57 والغرب 13.5 والشرق 14 ملجم/لتر.
كما أن تركيزات المعادن الثقيلة للعينات المدروسة كانت أقل من حدود الكشف للأجهزة المستخدمة للقياس. وكانت اقل تركيزًا في الجنوب والاتجاه الغربي والأكبر كانت في الشرق، وبحسب ملاحظتنا بشكل عام، لاحظنا أن عينات الاتجاه الغربي كانت أكثر المياه مملحة بينما كانت العينات أقل ملوحة في الاتجاه الشرقي والجنوبي. كما أظهرت نتائج هذا العمل أن جميع عينات المياه التي تم جمعها من المياه السطحية في منطقة سرت طبيعية ومقبولة للاستخدام الزراعى والثروة الحيواني ، لذلك تحتاج إلى معالجة بسيطة حتى تصبح قابلة للاستخدام البشري، مقارنة مع معايير المياه فالصادرة من منظمة الصحة العالمية.
الكلمات المفتاحية : المياه الجوفية، نوعية المياه، المعادن الثقيلة، البارامترات الفيزيائية الكيميائية، ليبيا، مدينة سرت.
