Groundwater Quality and Arsenic
Anil K Dwivedi*
Department of Botany, Deen Dayal Upadhyay Gorakhpur University, Gorakhpur-273009, U.P., India
Submission: March 23, 2017; Published: July 11, 2017
*Corresponding author: Anil K Dwivedi, Department of Botany, Deen Dayal Upadhyay Gorakhpur University, Gorakhpur-273009, U.P., India, Email: anil.k.dwiwedi@gmail.com
How to cite this article: Anil K D. Groundwater Quality and Arsenic. JOJ Case Stud. 2017; 3(4) : 555617. DOI:10.19080/JOJCS.2017.02.555617.
Abstract
Arsenic is one of the prominent contaminant, which is degrading the quality of groundwater naturally. In India, arsenic pollution in groundwater is mainly reported from West Bengal. Since its first reported case in early eighties, there are 1312 affected villages, 15 non-municipal and 9 municipalities in 8 districts in the State till date. On an approximation 34000 sq km area in the State is reported with high concentration of arsenic in drinking water abstracted from tube wells. The pollution is mostly reported from the intermediate water depth of 20-80 meter below ground level.
Introduction
Water Pollution is an alarm at the global level. The groundwater is continuously decreasing, in anthropogenic pressure as well as naturally. Arsenic is one of the prominent contaminant, which is degrading the quality of groundwater naturally. In India, arsenic pollution in groundwater is mainly reported from West Bengal. Since its first reported case in early eighties, there are 1312 affected villages, 15 non-municipal and 9 municipalities in 8 districts in the State till date. On an approximation 34000 sq km area in the State is reported with high concentration of arsenic in drinking water abstracted from tube wells. The pollution is mostly reported from the intermediate water depth of 20-80 meter below ground level. The arsenic anomaly in the State is associated with high iron, calcium, magnesium and bicarbonates with low sulphate, fluoride and chloride. The problem of arsenic pollution has been reported to be due to the geological formations of the source material. Occurrence of ‘arseno-pyrite’ and the change of geo-chemical environment due to over-exploitation of groundwater or excessive fluctuation of groundwater table.
Reports
Asadi et al. [1] have studied the assessment and mapping of water pollution of Municipal Corporation of Hyderabad using Remote Sensing and Geographic Information System (RS &GIS). They observed high concentration of total dissolved solids (TDS), nitrates, fluorides and total hardness in few industrial and densely populated areas indicated deteriorated water quality while the other areas exhibited moderate to good water quality. Bohi et al. [2] Performed physicochemical analysis of bore well drinking water of Nadia territory. They analyzed the water samples during February 2003 to June 2003 in order to assess water quality index (WQI). Joshi et al. [3] evaluated the underground water quality of Vagdodtaluka of Gujarat.
Rajmohan et al. [4] measured the major ion correlation in the groundwater of Kancheepuram region of South India. They analyzed the physicochemical characteristics such as pH, electrical conductivity and total dissolved solids (TDS) and ions like Ca+2, Mg+2, Na+, K+, Cl , HCO3-, CO3-2, SO4-2, NO3- etc. of the groundwater of bore well and dug wells of the area. The analysis indicated that most of the elements were positively correlated. Dwivedi et al. [5] also reported the crude agricultural practices to be one of the prominent causes of the groundwater pollution in most of the cases, from the rural belt in India.
Rajurkar et al. (2003) have tested the physicochemical and biological parameters of the water of river Umshyrpi at Shillong (Meghalaya). The river is highly polluted by different kinds of wastes viz. domestic wastes, solid wastes and agricultural runoff from the surrounding areas. The results showed that the physicochemical parameters were within the permissible limits, whereas, the biological parameters were exceeding the permissible limits. This indicated the alarm against the potability of the water. Singh and Singh (2003) have surveyed the groundwater markets and equity and reliability to the water access in Western U. P. Bahador et al. [6] have studied the seasonal variation of microbial pollution in surface water of Pune city (Maharashtra). They reported that the total viable count in monsoon was more than the summer and the winter seasons. The foecal coliform bacteria were found from all the sites in all the seasons but their number was more in monsoon. They also isolated few pathogenic bacterial species such as Salmonella from three different sites.
Ahmad & Alam [7] performed physicochemical and toxicological studies of groundwater and industrial effluents in and around Delhi. They determined the chemical contaminants such as mercury, cadmium, chromium, lead, nickel, iron, and zinc in the underground water, drains and Yamuna river. They found that the water quality parameters were very poor, except the samples of upstream.
Garg et al. [8] analyzed the groundwater quality in Western zone of Hissar (Haryana). The results revealed a positive and significant correlation of electrical conductivity with TDS, sodium, calcium, chloride, sulphate and total hardness. They also found that total hardness was positively and significantly correlated with calcium, magnesium, chloride and sulphate, whereas, total alkalinity was positively and significantly correlated with bicarbonate. Anthropecology of the water bodies with respect to development, and politics has been studied in detail and the findings have been elaborated by Dwivedi et al. [9] Tripathi et al. [10]. The flexible policies of the government have also been reported to be also the cause of the flood in India Dwivedi & Shashi [11]. Singh & Dwivedi (2011) have discussed the status and statues regarding the ground water.
Lalitha et al. [12] assessed the drinking water quality in selected pilgrim centres near Tiruchirapalli. They analyzed the water samples for various physicochemical and biological parameters and the results were compared with ISI, WHO and USPHS standards. They calculated water quality index (WQI) and suggested suitable treatment methods. Nirmal et al. [13] investigated the physicochemical properties of
groundwater in and around Anand district (Gujarat). They found that there was a wide variation in water quality from sample to sample and the amount of TDS, alkalinity and magnesium hardness was recorded very high in most of the water samples. Singh et al. [14] have analyzed the water quality aspects of some wells, springs and rivers in Udhampur (J & K). The study showed alkaline nature of groundwater. Calcium and magnesium were the dominating cations and bicarbonate was the major anion in the study area.
Shashi & Dwivedi [15], Dwivedi & Prajapati [16] have applied the experimental approach for the study of pollution of the rivers Varuna in Varanasi and river Aami in Gorakhpur, respectively. The same with respect to the groundwater pollution has been elaborated by Shashi & Dwivedi [17], Dwivedi & Prajapati [18] tested the groundwater quality status in Amini islands of Lakshadweep. They have reported that the total hardness and salinity were found to be most critical water quality parameter exceeding the permissible limits of drinking water standards. They also observed that the hardness and salinity were comparatively better on the lagoon side as compared to sea side.
Piska et al. [19] studied the heavy metal pollution and its effect on groundwater quality of Jeedimelta industrial area, Hyderabad. They analyzed various heavy metals such as Cd, Hg, Pb, Cr, Co, Ba etc. along with pH and electrical conductivity. The results indicated that all the heavy metals including electrical conductivity values were above the permissible limit of WHO. They found that groundwater was highly polluted and was unfit for domestic, irrigation and for fishery purposes. Jain et al. [20] studied the correlation coefficient of some physicochemical characteristics of groundwater of Jabalpur. They reported that high positive correlation was found between pH and fluoride, electrical conductivity and HCO3-, SO4-2 and Na+, Ca+2 and NO3-, Na+ and Cl-, K+ and Cl- and high negative correlation was obtained between Cl- and PO4-3 and pH and PO4-3.
Azmi & Banerjee [21] performed biological stabilization of textile waste and dye stuff industrial waste. They have suggested that the effluents from textile and dyeing industries polluted the groundwater of the adjoining area. Suriyanarayanan et al. [22] evaluated the groundwater of Kanchipuram and observed that the groundwater was polluted by a waste paper based paper mill effluent. Wagh & Shrivastava [23] evaluated the impact of heavy metals on soil and groundwater. Tandel & Oza [24] have implied “Powdered Activated” and “Powdered Commercial Charcoal” as adsorbents for removal of copper and nickel from waste water of electroplating industry. They found that higher efficiency value of adsorption was obtained at lower dose of powdered activated charcoal which removed 61.28% copper and 50.35% nickel at a maximum dose of 25g/L, whereas similar dose of powdered commercial charcoal removed 28.74% copper and 24.80% nickel respectively. Jogi & Ilyas [25] used “Maize Husk” for the removal of iron from industrial waste water. They observed that iron was heavily adsorbed on the maize husk and it was found to be very effective for removal of iron [26-28].
Conclusion
These selected studies indicate towards the importance of the groundwater and its need for the future. It is also indicated that sustainable development should be preferred over the simple development. Arsenic, though it is contaminating the groundwater naturally, but the human interference in this phenomenon, directly or indirectly cannot be over-ruled.
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