Energy & Environment Engineering Department, Quaid-e-Awam University of Engineering, Science & Technology, Nawabshah, Pakistan.
Faculty of Civil Engineering and Built Environment, Universiti Tun Hussein Onn Malaysia, Parit Raja, Malaysia.
J Air Waste Manag Assoc. 2022 Jan;72(1):69-75. doi: 10.1080/10962247.2021.1894267. Epub 2021 Sep 24.
Landfill leachate is a liquid generated due to rainwater percolation through the waste in a landfill or dumping site that may contain high levels of organic matter, both biodegradable and non-biodegradable, which are the major sources of water pollution. Chemical oxygen demand (COD) and Ammoniacal Nitrogen (NH-N) contents have been relevant indicators of severity and pollution potential of landfill leachate. The reductions of COD and NH-N were investigated in this study using different combinations of media ratios of green mussel (GM) and zeolite (ZEO). Generally, ZEO is considered as a renowned adsorbent but with a relatively high in cost. In Malaysia, mussel shell is abundantly available as a by-product from the seafood industry, is regarded as waste, and is mostly left at the dumpsite to naturally deteriorate. Its quality and availability make GMs a cost-effective material. In this research study, leachate samples were characterized and found to contain high concentrations of COD and NH-N. The adsorption process was conducted to find out the best combination media ratio between GM and ZEO. The removing efficiency was determined at different amounts of composite media ratios. The optimal adsorbent mixture ratios between (GM: ZEO) of 1.0:3.0 and 1.5:2.5 were considered as a more efficient technique in removing COD and NH-N compared to exploiting these adsorbents individually. The optimal extenuation removal reduction was found at an approximately 65% of COD and 78% of NH-N. The adsorption Isotherm Langmuir model exhibited a better fit with high regression coefficient for COD (R = 0.9998) and NH-N (R = 0.9875), respectively. This means that the combination of GM: ZEO adsorption of landfill leachate in this analysis is homogeneous with the monolayer. The mixture of GMs and ZEO was observed to provide an alternative medium for the reduction of COD and NH-N with comparatively lower cost.: The concentration of organic constituents (COD) and ammoniacal nitrogen in stabilized landfill leachate have significantly strong influences of human health and the environment. The combination of mixing media green mussel and zeolite adsorbent enhancing organic constituents (COD) and ammoniacal nitrogen reduction efficiency from leachate. This would be greatly applicable in future research as well as conventionally minimizing high cost materials like zeolite, thereby lowering the operating cost of leachate treatment.
垃圾渗滤液是一种由于雨水渗透到垃圾填埋场或倾倒场中的废物而产生的液体，其中可能含有高水平的有机物质，包括可生物降解和不可生物降解的物质，这些都是水污染的主要来源。化学需氧量（COD）和氨氮（NH-N）含量一直是衡量垃圾渗滤液严重程度和污染潜力的相关指标。本研究采用不同比例的贻贝（GM）和沸石（ZEO）组合来研究 COD 和 NH-N 的去除情况。通常，沸石被认为是一种著名的吸附剂，但成本相对较高。在马来西亚，贻贝壳作为海鲜工业的副产品大量存在，被视为废物，大部分被丢弃在垃圾场自然降解。其质量和可用性使贻贝成为一种具有成本效益的材料。在这项研究中，对渗滤液样本进行了特征分析，发现其含有高浓度的 COD 和 NH-N。进行了吸附过程以找出 GM 和 ZEO 之间的最佳组合介质比例。通过不同量的复合介质比例来确定去除效率。（GM:ZEO）的 1.0:3.0 和 1.5:2.5 被认为是比单独使用这些吸附剂更有效的去除 COD 和 NH-N 的技术。COD 和 NH-N 的最大去除率分别约为 65%和 78%。吸附等温线 Langmuir 模型对 COD（R=0.9998）和 NH-N（R=0.9875）都表现出了很好的拟合度，具有很高的回归系数。这意味着在本分析中，GM:ZEO 对垃圾渗滤液的吸附是均匀的，并且是单层的。观察到贻贝和沸石的混合物为降低 COD 和 NH-N 提供了一种替代介质，成本相对较低。：稳定化垃圾渗滤液中的有机成分（COD）和氨氮浓度对人类健康和环境有显著的强烈影响。混合贻贝和沸石吸附剂可提高渗滤液中有机成分（COD）和氨氮的去除效率。这在未来的研究中具有很大的适用性，同时也可以减少沸石等高成本材料的使用，从而降低渗滤液处理的运行成本。
