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http://dx.doi.org/10.9719/EEG.2021.54.1.21

Evaluation of Stabilization Capacity for Typical Amendments based on the Scenario of Heavy Metal Contaminated Sites in Korea  

Yang, Jihye (Department of Earth Environmental Sciences, Pukyong National University)
Kim, Danu (Department of Earth Environmental Sciences, Pukyong National University)
Oh, Yuna (Department of Earth Environmental Sciences, Pukyong National University)
Jeon, Soyoung (Department of Earth Environmental Sciences, Pukyong National University)
Lee, Minhee (Department of Earth Environmental Sciences, Pukyong National University)
Publication Information
Economic and Environmental Geology / v.54, no.1, 2021 , pp. 21-33 More about this Journal
Abstract
The purpose of this study is to determine the order of priority for the use of amendments, matching the optimal amendment to the specific site in Korea. This decision-making process must prioritize the stabilization and economic efficiency of amendment for heavy metals and metalloid based on domestic site contamination scenarios. For this study, total 5 domestic heavy metal contaminated sites were selected based on different pollution scenarios and 13 amendments, which were previously studied as the soil stabilizer. Batch extraction experiments were performed to quantify the stabilization efficiency for 8 heavy metals (including As and Hg) for 5 soil samples, representing 5 different pollution scenarios. For each amendment, the analyses using XRD and XRF to identify their properties, the toxicity characteristics leaching procedure (TCLP) test, and the synthetic precipitation leaching procedure (SPLP) test were also conducted to evaluate the leaching safety in applied site. From results of batch experiments, the amendments showing > 20% extraction lowering efficiency for each heavy metal (metalloid) was selected and the top 5 ranked amendments were determined at different amount of amendment and on different extraction time conditions. For each amendment, the total number of times ranked in the top 5 was counted, prioritizing the feasible amendment for specific domestic contaminated sites in Korea. Mine drainage treatment sludge, iron oxide, calcium oxide, calcium hydroxide, calcite, iron sulfide, biochar showed high extraction decreasing efficiency for heavy metals in descending order. When the economic efficiency for these amendments was analyzed, mine drainage treatment sludge, limestone, steel making slag, calcium oxide, calcium hydroxide were determined as the priority amendment for the Korean field application in descending order.
Keywords
stabilization; soil contamination; soil remediation; amendment; mine drainage treatment sludge; steel making slag;
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