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首页> 外文期刊>Arabian journal of geosciences >Site characterization and risk assessment in support of the design of groundwater remediation well near a hazardous landfill
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Site characterization and risk assessment in support of the design of groundwater remediation well near a hazardous landfill

机译：现场特征分析和风险评估，以支持危险垃圾填埋场附近的地下水修复设计

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This study was undertaken to support a remediation technique that will be applied to contaminated groundwater in the vicinity of Ghonan landfill, eastern Saudi Arabia. Preliminary field investigations involved hydrogeological characterization of the entire area. The improved understanding of the underlying geology and groundwater movement gained from the preliminary studies helped in determining a test site within the proximity of the landfill. One remediation well and five monitoring wells were constructed at the test site. Optimum pumping rate for the remediation well was determined to range from 2.642 through 7.926 gallons per minute (gpm) (0.01 m(3)/min through 0.03 m(3)/min) based on site-specific hydrogeological investigations and mathematical simulation. A concentration of 0.05 mg/L of methyl tertiary-butyl ether (MTBE) contaminated the aquifer in the test site. The simulated concentration of MTBE at the point of exposure after a period of 2 years was found to be higher than the maximum contaminant level of 0.005 mg/L set by the United States Environmental Protection Agency (U. S. EPA). The results of risk assessment conducted revealed that domestic use of groundwater in the study area through any of the exposure pathways (ingestion, dermal contact, and inhalation in the shower) may lead to development of health risks to human receptors. The landfill, which is being operated as a hazardous landfill and a dump site, may become a source of groundwater pollution in its vicinity in the near future. As a potential health risk, it should be controlled properly by remediating the aquifer and implementing environmental measures to the landfill users.
机译：进行这项研究是为了支持一种修复技术，该技术将应用于沙特阿拉伯东部Ghonan垃圾填埋场附近的被污染的地下水。初步的现场调查涉及整个区域的水文地质特征。通过初步研究，人们对基础地质和地下水运动有了更深入的了解，有助于确定垃圾填埋场附近的测试地点。在测试现场建造了1处修复井和5处监测井。根据特定地点的水文地质调查和数学模拟，确定修复井的最佳抽水速率为2.642至7.926加仑/分钟（gpm）（0.01 m（3）/ min至0.03 m（3）/ min）。 0.05 mg / L的甲基叔丁基醚（MTBE）浓度在测试地点污染了含水层。发现两年后暴露点的MTBE模拟浓度高于美国环境保护署（U.S. EPA）设定的最大污染物水平0.005 mg / L。进行的风险评估结果表明，通过任何暴露途径（摄入，皮肤接触和淋浴时吸入）在研究区域内使用地下水可能导致人类受体产生健康风险。被用作危险垃圾场和垃圾场的垃圾场，在不久的将来可能会成为其附近地下水污染的源头。作为潜在的健康风险，应通过对含水层进行补救并对垃圾填埋场用户实施环境措施来对其进行适当控制。

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