首页> 外文期刊>Journal of Geoscience and Environment Protection >The Effect of the Challawa Industrial Estate on the Physicochemical Properties and Heavy Metal Levels of Portable Water Supply in Kano Metropolis, Nigeria
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The Effect of the Challawa Industrial Estate on the Physicochemical Properties and Heavy Metal Levels of Portable Water Supply in Kano Metropolis, Nigeria

机译:Challawa工业区对尼日利亚卡诺大都会的便携式供水的理化特性和重金属含量的影响

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It has been observed that theportable water quality obtained from various locations in Kano Metropolis hasshown greater variations in the recent past. Attempts have been made toascertain the reasons for the variations even though the supplies were fromonly two treatments plants that obtain their raw water from the same source. Atotal of 92 water samples comprising of raw (from plants) and treated (from theplants and taps) were collected during rainy and dry seasons between April 2010and May, 2012 and analyzed using standard analytical techniques. The results ofanalysis gave the physiochemical properties with range as follows: pH (0.06 ±6.7 - 6.04 ± 0.02) conductivity (7.23 ±0.04 - 13.33 ± 0.22 S/Cm), turbidity(5.00 ± 0.01 - 449.22 ±1.32 NTU), suspended solids (107.33±3.45 - 712.11 ±5.33 mg/dm3),total dissolved solids (18.50 ± 0.85 -186 .78 ± 2.48 mg/dm3 ), alkalinity(12.53± 0.32 - 80.75 ± 1.23 mg/dm3) and hardness (29.50 ± 1.22 - 58.67 ± 2.34mg/dm3). The pH values were generally acidic while the turbidity and totalsolid especially in some locations were higher than the permissible levels setby the World Health Organization for portable water. The concentration of heavymetals (mg/dm3) were found in the following ranges Fe (0.10 ± 0.04 - 0.30 ±0.02), Cu (0.01 ± 0.001 - 0.03 ± 0.002), Zn (0.13 ± 0.06 - 0.39 ±0.02), Pb(0.03 ± 0.01 - 0.17 ± 0.02), Mn (0.03 ± 0.004 - 0.13 ± 0.003), Cr (0.10 ± 0.04 -0.31 ± 0.03). The highest values of Fe, Cu and Mn were recorded along the olderdistribution channel of Challawa. The levels of Pb and Cr were generally highin both routes which are also observed in the raw water used at the twotreatments plants. The results obtained from heavy metal concentrations fellwithin the maximum allowable limit set by the World Health Organization forportable water except in the cases of Pb and Cr. The high Fe, Mn, Cu levels asobtained in the Challawa route were attributed to leaching from rusting in theold galvanized metal pipe-work in the distribution channel. The levels ofchromium and lead were similar in the two networks showing that the raw waterused in the both treatment plants were responsible for the high values obtainedand were not effectively removed by the treatment processes.
机译:已经观察到,在最近的过去中,从卡诺都市区的各个位置获得的便携式水质显示出更大的变化。尽管供应仅来自两个从同一来源获得原水的处理厂,但已尝试确定变化的原因。在2010年4月至2012年5月的雨水和干旱季节,总共收集了92个水样本,其中包括原水(植物)和经处理的水(植物和水龙头),并使用标准分析技术进行了分析。分析结果给出其理化特性范围如下:pH(0.06±6.7-6.04±0.02)电导率(7.23±0.04-13.33±0.22 S / Cm),浊度(5.00±0.01-449.22±1.32 NTU),悬浮固体(107.33±3.45-712.11±5.33 mg / dm3),总溶解固体(18.50±0.85 -186 .78±2.48 mg / dm3),碱度(12.53±0.32-80.75±1.23 mg / dm3)和硬度(29.50±1.22) -58.67±2.34mg / dm3)。 pH值通常呈酸性,而浊度和总固体(尤其是在某些地方)则高于世界卫生组织为便携式水所设定的允许水平。重金属的浓度(mg / dm3)在以下范围内:Fe(0.10±0.04-0.30±0.02),Cu(0.01±0.001-0.03±0.002),Zn(0.13±0.06-0.39±0.02),Pb( 0.03±0.01-0.17±0.02),Mn(0.03±0.004-0.13±0.003),Cr(0.10±0.04 -0.31±0.03)。 Fe,Cu和Mn的最大值沿Challawa的较早分布通道记录。在这两种途径中,Pb和Cr的含量通常都很高,这在两种处理厂所用的原水中也可以观察到。从重金属浓度获得的结果落在世界卫生组织为便携式水设定的最大允许限值之内,但铅和铬除外。在Challawa路线中获得的高Fe,Mn,Cu水平归因于分配通道中旧镀锌金属管道中的锈蚀浸出。两个网络中铬和铅的含量相似,表明两个处理厂中使用的原水是所获得的高价值的原因,并且不能被处理过程有效去除。

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