Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/1548
Title: Progress in assisted natural remediation of an arsenic contaminated agricultural soil
Authors: Mench, M.
VANGRONSVELD, Jaco 
BECKX, Carolien 
RUTTENS, Ann 
Issue Date: 2006
Publisher: Elsevier
Source: ENVIRONMENTAL POLLUTION, 144(1). p. 51-61
Abstract: A contaminated soil was collected in a field adjacent to a derelict As(III) smelter in Reppel (Bocholt, Belgium). A single soil treatment (% by soil weight) based on either iron grit (SS, 1%), beringite (B, 5%), or iron grit (1%) + beringite (5%) (BSS) was applied. Untreated and treated Reppel soils and a control soil were placed in lysimeters inside a greenhouse and cropped annually. The efficiency of soil treatments in decreasing As and metals in exposure sources and restoring soil functions was assessed 6 years after the treatments commenced. Decreases in extractable Cd, Mn, Zn and As occurred in the BSS soil. Only BSS treatment reduced both As and metal concentrations in leachates. BSS treatment produced best growth of lettuce and cabbage, the highest shoot and pod yields for dwarf bean, the lowest As, Cd and Zn concentrations in plant tissues, and partly restored Rhizobium nodulation on bean roots. The epigeic earthworm (Dendrobaena octaedra) could only survive in the BSS soil. Depurated living worms from the BSS soil had Cd concentration similar to those in control worms, but higher As, Ca, Fe, and Zn concentrations. Based on physiologically based extraction test (PBET), As bioaccessibility was reduced from 12% (untreated soil) to 7.4% (BSS) and 3% (SS), but only the SS treatment decreased the bioaccessibility of Cd (−30%) and Pb (−35%). The range of chemical and biological indicators suggested that BSS amendment was the most effective treatment for restoration of normal soil functions 6 years after initial treatment of the Reppel soil.
Keywords: Iron oxide; Cyclonic ash; Arsenic; Metal; Soil remediation; Bioindicator
Document URI: http://hdl.handle.net/1942/1548
ISSN: 0269-7491
e-ISSN: 1873-6424
DOI: 10.1016/j.envpol.2006.01.011
ISI #: 000241138100008
Category: A1
Type: Journal Contribution
Validations: ecoom 2007
Appears in Collections:Research publications

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