NDLI: Assessment of groundwater contamination from a hazardous dump site in Ranipet, Tamil Nadu, India

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Assessment of groundwater contamination from a hazardous dump site in Ranipet, Tamil Nadu, India

Content Provider	Springer Nature Link
Author	Rao, G. Tamma Rao, V. V. S. Gurunadha Ranganathan, K. Surinaidu, L. Mahesh, J. Ramesh, G.
Copyright Year	2011
Abstract	Tanneries located in an industrial development area of Ranipet (India) manufactured chromate chemicals during 1976–1996. A large quantity of associated hazardous solid wastes has been stacked about 5-m high above ground level, spread over 3.5 ha inside one of the factory premises. The study area receives an average annual rainfall of 1,100 mm. The granitic formation in the northern part of Palar River catchment has high infiltration rates and has resulted in fast migration of the contamination to the water table. Chromium levels in the groundwater were found up to 275 mg/l. The available hydrogeological, geophysical and groundwater quality data bases have been used to construct a groundwater flow and mass transport model for assessing the groundwater contamination and it has been calibrated for the next 30 years. The migration has been found to be very slow, with a groundwater velocity of 10 m/year. This is the first field-scale study of its kind in this industrial area. The findings are of relevance to addressing the groundwater pollution due to indiscriminate disposal practices of hazardous waste in areas located on the phreatic aquifer. Further, it has been reported that the untreated effluent discharge adjacent to the chromium dump site is most influential in the migration of contaminants.Les tanneries situées dans une zone de développement industriel de Ranipet (Inde) ont fabriqué des produits chromés entre 1976 et 1996. Une grande quantité des déchets solides dangereux associés a été entassée sur à peu près 5 m au-dessus du niveau du sol, sur une superficie de 3.5 ha à l’intérieur de l’un des terrains de l’usine. La zone d’étude reçoit une hauteur de pluie annuelle moyenne de 1,100 mm. La formation granitique de la partie nord du bassin versant de Palar River dispose de lames d’eaux infiltrées élevées et il en a résulté une migration rapide de la contamination jusqu’à la surface libre de la nappe. Des teneurs en chrome atteignant 275 mg/l ont été détectées dans l’eau souterraine. Les bases de données disponibles sur l’hydrogéologie, la géophysique et la qualité de l’eau ont été utilisées pour établir un modèle de l’écoulement souterrain et du transfert de masses afin d’évaluer la contamination de l’eau et il a été calibré pour les 30 prochaines années. La migration a été reconnue très lente, avec une vitesse de l’eau souterraine de 10 m/an. C’est la première étude de terrain de ce type dans la zone industrielle. Les résultats sont cohérents avec l’imputation de la pollution de l’eau souterraine à des pratiques inconsidérées d’élimination de déchets dangereux dans des zones situées au-dessus de la nappe phréatique. De plus, il a été exposé que le rejet d’effluents non traités à proximité du site de dépôt de chrome est la cause principale de la migration des contaminants.Las curtiembres localizadas en un área de desarrollo industrial de Ranipet (India) manufacturaban sustancias químicas cromáticas durante 1976–1996. Una gran cantidad de residuos sólidos peligrosos asociados han sido apilados aproximadamente en 5-m de altura por encima del nivel del terreno, esparcidos sobre 3.5 hectáreas dentro de uno de los predios de la fábrica. El área bajo estudio recibe una precipitación media anual de 1100 mm. La formación granítica en la parte norte de la Cuenca del Río Palar tiene un alto ritmo de infiltración, lo que ha provocado una migración rápida de los contaminantes a la capa freática. Los niveles de cromo encontrados en el agua subterránea llegaron hasta 275 mg/l. Se usaron las bases de datos hidrogeológicos, geofísicos y de de calidad de agua subterránea disponibles para construir un modelo de flujo de agua subterránea y de transporte de masa para evaluar la contaminación de agua subterránea, que ha sido calibrado para los próximos 30 años. Se encontró que la migración es muy lenta, con una velocidad de agua subterránea de 10 m/a. Este es el primer estudio a escala de campo de esta clase de industria. Los hallazgos son de relevancia para el tratamiento de la contaminación del agua subterránea debido a las prácticas indiscriminadas de disposición de residuos peligrosos en áreas localizadas sobre un acuífero freático. Más aún, se ha reportado que la descarga del efluente no tratado adyacente al sitio de vertido de cromo tiene mucha influencia en la migración de contaminantes.位于拉尼贝特(印度)工业开发区内的制革厂于1976–1996年期间制造铬酸盐化学品。大量与之相关的危险固体垃圾在厂区堆放,达到地面以上5米高,面积达3.5公顷。研究区年平均降水量为1,100 mm。巴拉尔河流域北部高渗透率的花岗岩地层致使污染物迅速运移进入含水层。地下水中铬含量高达275 mg/L。本研究运用现有的水文地质、地球物理和地下水水质数据构建地下水运动和溶质运移模型来评估地下水污染, 并用接下来30年的数据对模型进行校正。污染物在含水层中运移速度缓慢, 地下水流速为10 m/year。此类现场尺度的研究在这个工业区是第一次。结果对于研究地下潜水含水层水污染与上方不分类处理的危险废物之间的关系有意义。此外, 含铬废弃物存放处附近未经处理的污水排排放对污染物迁移的影响很大。Indústrias de curtumes localizadas numa área de desenvolvimento industrial em Ranipet (Índia) produziram cromatos entre 1976 e 1996. Uma grande quantidade de resíduos sólidos perigosos foi empilhada até cerca de 5 m de altura sobre o solo, e espalhados por uma área de 3.5 ha dentro de uma das instalações fabris. A área de estudo situa-se numa zona com precipitação anual média de 1100 mm. A formação granítica na parte norte da bacia do Rio Palar apresenta taxas de infiltração elevadas, o que resultou numa migração rápida do contaminante para o nível freático. Os níveis de crómio na água subterrânea chegaram a 275 mg/l. As bases de dados hidrogeológicas, geofísicas e de qualidade da água têm sido usadas para construir modelos de fluxo e transporte de massa de águas subterrâneas para avaliar a contaminação e têm sido calibrados para os próximos 30 anos. Verificou-se que a migração tem sido muito lenta, com uma velocidade da água subterrânea de 10 m/ano. Este é o primeiro estudo deste tipo à escala de campo nesta área industrial. Os resultados são relevantes para abordar a poluição de águas subterrâneas devida a práticas de deposição indiscriminada de resíduos perigosos em áreas localizadas sobre um aquífero freático. Além disso, tem sido reportado que a descarga de efluentes não tratados em áreas adjacentes ao local de acumulação dos resíduos de crómio é mais influente na migração dos contaminantes.
Starting Page	1587
Ending Page	1598
Page Count	12
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	19
Issue Number	8
e-ISSN	14350157
Language	Chinese
Publisher	Springer-Verlag
Publisher Date	2011-08-27
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hexavalent chromium Contamination Groundwater flow Conceptual model India Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Geology Hydrogeology
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Water Science and Technology

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