Studies on loads of chemicals derived from plastics in leachate from waste landfills
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The origins and loads of chemicals discharged from waste landfills, such as bisphenol A (BPA), 4-nonylphenol (NP) and 1, 4-dioxane, which are of concern due to their influence on the ecosystem, are discussed based on the results of continuous monitoring of leachate and serial-batch leaching tests. The concentrations of BPA contained in leachate varied widely and was detected in many types of waste landfills. However, NP was detected at much lower concentrations than BPA. Although it was confirmed that NP was contained in plastics the same as BPA, especially plasticized polyvinyl chloride (PVC), the amount of NP leached from PVC was much less than that of BPA, because NP is a more hydrophobic substance than BPA. The results of continuous monitoring in leachate from old waste landfills showed that 1, 4-dioxane concentration decreased after 300mm of rainfall, despite increased BPA and NP concentrations. However, variations of loads on these three chemicals from those landfills showed a similar trend, and reached maximal levels after 1 week of rainfall, when the maximal volume of leachate in each landfill was recorded. Annual amounts of these chemicals in the leachate were estimated. The maximum was 2.6kg/year for BPA, 0.2kg/year for NP and 0.6kg/year for 1, 4-dioxane, respectively.
- 社団法人 環境科学会の論文
社団法人 環境科学会 | 論文
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