Bore and Well Water Quality Studies in The Tarkwa-Nsuaem Municipality and Prestea-Huni-Valley District, SW Ghana

Ghana Mining Journal Pub Date : 2011-03-11 DOI:10.4314/GM.V12I1.64370

If Quansah, R. Amankwah

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引用次数: 5

Abstract

The quality of bore and well water within the Tarkwa-Nsuaem Municipality and Prestea-Huni-Valley District has been studied. The major cationic pollutants with concentrations above the WHO standards were iron, molybdenum, lead, mercury and manganese. High nitrate levels were found in boreholes at Akoon and Brenu Akyim which are communities close to active large scale mines where nitrates are major constituents of the explosives utilised. The study revealed that due to high microbial contamination, wells and boreholes at Tarkwa Community Centre, GAG Mile 7, Teberebie Roadside, Samahu Quarters, Dumasi, Abekoase, and Prestea Anyinam will require shock chlorination. Such a step can potentially reduce the numerous domestic water related sicknesses recorded in the investigation. Hydrochemical modelling using PHREEQC software indicated that some minerals had high saturation indices with the highest being goethite, hematite and ferric hydroxide at 7.38, 16.78 and 1.38 respectively within a borehole at Dumasi. The relatively high saturation indices of the iron oxides and hydroxides in the Dumasi samples explain the reddish brown precipitate formed when the samples are allowed to stand for a while. The results demonstrate that geological, mining and non-mining community related activities contribute to the water quality within the study area.

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加纳西南部Tarkwa-Nsuaem市和Prestea-Huni-Valley区井水质量研究

研究了塔尔夸-恩苏安市和普雷斯泰-胡尼河谷地区的钻孔水和井水质量。超过世界卫生组织标准的主要阳离子污染物为铁、钼、铅、汞和锰。在Akoon和Brenu Akyim的钻孔中发现了高硝酸盐水平，这两个社区靠近活跃的大型矿山，硝酸盐是所使用炸药的主要成分。研究显示，由于微生物污染严重，Tarkwa社区中心、GAG Mile 7、Teberebie路边、Samahu Quarters、Dumasi、Abekoase和Prestea Anyinam的井和钻孔将需要进行冲击氯化处理。这一步骤可以潜在地减少调查中记录的许多与生活用水有关的疾病。利用PHREEQC软件进行的水化学模拟表明，杜马西钻孔中某些矿物具有较高的饱和度指数，其中针铁矿、赤铁矿和氢氧化铁饱和度指数最高，分别为7.38、16.78和1.38。杜马西样品中氧化铁和氢氧化物的相对较高的饱和指数解释了样品在放置一段时间后形成的红棕色沉淀。结果表明，地质、采矿和非采矿社区相关活动对研究区内的水质有影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Ghana Mining Journal

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