SUB-INDEX MODEL TO ASSESS GROUNDWATER WATER QUALITY FOR DRINKING AND CIVIL USES
DOI:
10.31413/nat.v11i3.15910Palavras-chave:
drinking water quality, water quality index, Tal-Abtah district, Mosul city – IraqResumo
ABSTRACT: The current study aims to assess groundwater quality for drinking and various domestic uses for selected wells from the district of Tal Abta and some of its affiliated villages located southwest of Mosul, Iraq. As samples were collected from ten wells distributed randomly in the study area, starting from summer until winter, with ten replicates for each well, physical, chemical and bacterial tests were conducted: temperature, electrical and chemical conductivity such as pH, total alkaline T. alkali, total hardness T. Hardness, phosphate ions PO4-3, sodium Na+, chloride, Cl-, sulfate SO4-2, nitrate NO3- and the total number of bacteria TPC, with the application of the sub-index model to evaluate the quality of water for drinking and civil use. The results of the Water Quality Index (WQI) indicated a deterioration in the quality of the studied groundwater, as the values ranged between (73.5 to 1538), so all studied samples are considered (Very Poor to Unfit quality) for drinking and civil uses; this deterioration is due to the high levels of Electrical conductivity, total hardness and sulfate ions, which amounted to (5994) uS cm-1 and (6420-2130) mg L-1, respectively, with a high total number of bacteria (TPC), which reached (1611) cells mL-1.
Keywords: drinking water quality; water quality index; Tal-Abtah district; Mosul city – Iraq.
Modelo de subíndice para avaliar a qualidade da água de lençol freático para consumo e uso civil
RESUMO: O presente estudo visa avaliar a qualidade da água subterrânea para consumo humano na forma de bebida e vários usos domésticos, provenientes de poços selecionados do distrito de Tal Abta e algumas de suas aldeias afiliadas localizadas a sudoeste da cidade de Mosul, Iraque. Foram coletadas amostras de dez poços distribuídos aleatoriamente na área de estudo, no verão e no inverno, com dez repetições para cada poço. Foram realizados testes físicos, químicos e bacterianos, com base nas seguintes variáveis: temperatura, condutividade elétrica e química como pH, T alcalino total. álcali, dureza total T, Dureza, íons fosfato PO4-3, sódio Na+, cloreto, Cl-, sulfato SO4-2, nitrato NO3- e o número total de bactérias TPC; posteriormente aplicou-se um modelo de sub-índice para avaliar a qualidade da água para beber e uso civil. Os resultados do índice de qualidade da água (IQA) indicaram uma deterioração da qualidade das águas subterrâneas estudadas, pois os valores variaram de 73,5 a 1538, portanto todas as amostras estudadas são consideradas com qualidade “muito ruim” a “inadequadas” para consumo humano e uso civil. Essa deterioração se deve aos altos níveis de condutividade elétrica, dureza total e íons sulfato, que totalizaram 5994 uS cm-1 e 6420-2130 mg L-1, respectivamente, com elevado número total de bactérias (TPC), que atingiu 1611 células mL-1.
Palavras-chave: qualidade de água potável; índice de qualidade de água; distrito de Tal-Abtah; cidade de Mosul – Iraque.
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