naa a22 4500 51074902X CHVBK 20180411083057.0 cr unu---uuuuu 180411e20130101xx s 000 0 eng 10.1007/s11270-012-1388-x doi (NATIONALLICENCE)springer-10.1007/s11270-012-1388-x In Situ Immobilization of Heavy Metals in Severely Weathered Tailings Amended with Food Waste-Based Compost and Zeolite [Elektronische Daten] [Taewoon Hwang, Carmen Neculita] Biowastes and inorganic additives are acknowledged efficient but site-dependent alternatives for in situ metal immobilization. The present study evaluates food waste-based compost, a particularly abundant type of biowaste in South Korea, and zeolite as amendments for increasing pH and reducing metal leaching potential in weathered tailings from an abandoned mine site. Two types of biowaste were used: food waste compost (60% food waste and 40% sawdust) and market compost (50% food waste, 10% agricultural waste, 10% manure, and 30% lime). Materials were thoroughly characterized. Leaching tests were then performed in reactors filled with various mixtures of organic-inorganic amended tailings, over a 4-week period. The in situ metal immobilization efficiency of compost was evaluated based on collected leachate quality. Results indicated that both organic and inorganic materials were successful for increasing pH (from 3.0 to up to 8.1) and metal immobilization, except for Pb and As, with which leaching potential increased in most amended reactors relative to un-amended tailings (up to 43 and 158%, respectively). Over the duration of the experiment, the cumulative reduction of metal leaching potential ranked as follows: Zn (44-91%) > Mn (4-76%) > Cr (20-53%) > Fe (34-44%) > Cd (17-43%) > Al (0.5-24%). Among mixtures, combined biowaste and zeolite-amended tailings showed the best performance for increasing pH (7.5-8.1) and for metal immobilization. Chemical and biological processes, such as sorption and precipitation processes, were predominant. Overall, the study provides useful data on the efficient use of food waste compost for acid mine drainage prevention in South Korea. Springer Science+Business Media Dordrecht, 2012 Tailings nationallicence Metal leaching potential nationallicence Food waste compost nationallicence Zeolite nationallicence Acid mine drainage prevention nationallicence Hwang Taewoon Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Gwahangno, 305-701, Daejeon, Yuseong-gu, South Korea aut Neculita Carmen Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Gwahangno, 305-701, Daejeon, Yuseong-gu, South Korea aut Water, Air, & Soil Pollution Springer Netherlands 224/1(2013-01-01), 1-9 0049-6979 224:1<1 2013 224 11270 https://doi.org/10.1007/s11270-012-1388-x text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-012-1388-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hwang Taewoon Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Gwahangno, 305-701, Daejeon, Yuseong-gu, South Korea aut NATIONALLICENCE 700 1- Neculita Carmen Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Gwahangno, 305-701, Daejeon, Yuseong-gu, South Korea aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/1(2013-01-01), 1-9 0049-6979 224:1<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer