NDLI: Arsenic mobility in the amended mine tailings and its impact on soil enzyme activity

Content Provider	Springer Nature Link
Author	Koo, Namin Lee, Sang Hwan Kim, Jeong Gyu
Copyright Year	2011
Abstract	The objectives of this study were to elucidate the effects of soil amendments [Ferrous sulfate (FeII), red mud, FeII with calcium carbonate (FeII/L) or red mud (RM/F), zero-valent iron (ZVI), furnace slag, spent mushroom waste and by-product fertilizer] on arsenic (As) stabilization and to establish relationships between soil properties, As fractions and soil enzyme activities in amended As-rich gold mine tailings (Kangwon and Keumkey). Following the application of amendments, a sequential extraction test and evaluation of the soil enzyme activities (dehydrogenase and β-glucosidase) were conducted. Weak and negative relationships were observed between water-soluble As fractions (AsWS) and oxalate extractable iron, while AsWS was mainly affected by dissolved organic carbon in alkaline tailings sample (Kangwon) and by soil pH in acidic tailings sample (Keumkey). The soil enzyme activities in both tailings were mainly associated with AsWS. Principal component and multiple regression analyses confirmed that AsWS was the most important factor to soil enzyme activities. However, with some of the treatments in Keumkey, contrary results were observed due to increased water-soluble heavy metals and carbon sources. In conclusion, our results suggest that to simultaneously achieve decreased AsWS and increased soil enzyme activities, Kangwon tailings should be amended with FeII, FeII/L or ZVI, while only ZVI or RM/F would be suitable for Keumkey tailings. Despite the limitations of specific soil samples, this result can be expected to provide useful information on developing a successful remediation strategy of As-contaminated soils.
Starting Page	337
Ending Page	348
Page Count	12
File Format	PDF
ISSN	02694042
Journal	Environmental Geochemistry and Health
Volume Number	34
Issue Number	3
e-ISSN	15732983
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-08-18
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Arsenic Multiple regression analysis Principal component analysis Soil amendment Soil enzyme activity Soil Science & Conservation Geochemistry Terrestrial Pollution Environmental Health Environmental Chemistry Public Health/Gesundheitswesen
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Medicine Geochemistry and Petrology Environmental Engineering Water Science and Technology

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