Division of Hydrologic Sciences. Desert Research Institute, Las Vegas, NV, USA.
College of Chemistry and Environmental Engineering, Shenzhen University, China.
Environ Pollut. 2021 Dec 15;291:118133. doi: 10.1016/j.envpol.2021.118133. Epub 2021 Sep 9.
Sanitary landfill is the most popular way to dispose solid wastes with one major drawback: the generation of landfill leachate resulting from percolation of rainfall through exposed landfill areas or infiltration of groundwater into the landfill. The landfill leachate impacts on the environment has forced authorities to stipulate more stringent requirements for pollution control, generating the need for innovative technologies to eliminate waste degradation by-products incorporated in the leachate. Natural attenuation has no effect while conventional treatment processes are not capable of removing some the pollutants contained in the leachate which are reported to reach the natural environment, the aquatic food web, and the anthroposphere. This review critically evaluates the state-of-the-art engineered materials and technologies for the treatment of landfill leachate with the potential for real-scale application. The study outcomes confirmed that only a limited number of studies are available for providing new information about novel materials or technologies suitable for application in the removal of pollutants from landfill leachate. This paper focuses on the type of pollutants being removed, the process conditions and the outcomes reported in the literature. The emerging trends are also highlighted as well as the identification of current knowledge gaps and future research directions along with recommendations related to the application of available technologies for landfill leachate treatment.
卫生填埋是处理固体废物最流行的方法，但有一个主要缺点：由于降雨渗透暴露的垃圾填埋区或地下水渗入垃圾填埋场，会产生垃圾渗滤液。垃圾渗滤液对环境的影响迫使当局对污染控制规定了更严格的要求，需要创新技术来消除渗滤液中包含的废物降解副产物。自然衰减没有效果，而传统的处理工艺无法去除渗滤液中一些据报道已到达自然环境、水生食物网和人类圈的污染物。本综述批判性地评估了用于处理垃圾渗滤液的工程材料和技术的最新进展，这些技术具有实际应用的潜力。研究结果证实，只有少数研究可提供有关适合从垃圾渗滤液中去除污染物的新型材料或技术的新信息。本文重点介绍了正在去除的污染物类型、文献中报道的工艺条件和结果。还强调了新兴趋势，并确定了当前的知识空白和未来的研究方向，以及与应用现有技术处理垃圾渗滤液有关的建议。
