School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Malaysia.
Solid Waste Management Cluster, Science and Technology Research Centre, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Malaysia.
Int J Environ Res Public Health. 2021 Dec 31;19(1):420. doi: 10.3390/ijerph19010420.
Chemical-based coagulants and flocculants are commonly used in the coagulation-flocculation process. However, the drawbacks of using these chemical materials have triggered researchers to find natural materials to substitute or reduce the number of chemical-based coagulants and flocculants. This study examines the potential application of seeds as a natural coagulant-coagulant aid with Tin (IV) chloride (SnCl) in eliminating suspended solids (SS), colour, and chemical oxygen demand (COD) from landfill leachate. Results showed that the efficiency of was low when used as the main coagulant in the standard jar test. When SnCl was applied as a single coagulant, as much as 98.4% of SS, 96.8% of colour and 82.0% of COD was eliminated at an optimal dose of 10.5 g/L and pH 7. The higher removal efficiency of colour (88.8%) was obtained when 8.40 g/L of SnCl was applied with a support of 3 g/L of . When SnCl was utilised as a coagulant, and seed was used as a flocculant, the removal of pollutants generally improved. Overall, this research showed that seed is a viable natural alternative for treating landfill leachate as a coagulant aid.
基于化学物质的混凝剂和絮凝剂通常用于混凝-絮凝过程。然而，使用这些化学物质的缺点促使研究人员寻找天然材料来替代或减少基于化学物质的混凝剂和絮凝剂的用量。本研究考察了种子作为一种天然助凝剂与四氯化锡（SnCl）在去除垃圾渗滤液中悬浮物（SS）、色度和化学需氧量（COD）方面的潜在应用。结果表明，在标准搅拌试验中，种子作为主要混凝剂的效率较低。当 SnCl 作为单一混凝剂使用时，在最佳剂量 10.5 g/L 和 pH 值 7 的条件下，SS 的去除率高达 98.4%，色度的去除率高达 96.8%，COD 的去除率高达 82.0%。当 SnCl 的用量为 8.40 g/L 时，与 3 g/L 的 种子配合使用，可获得更高的色度去除效率（88.8%）。当 SnCl 用作混凝剂，种子用作絮凝剂时，污染物的去除率通常会提高。总的来说，这项研究表明，种子是一种可行的天然替代物，可用作处理垃圾渗滤液的助凝剂。
