title: Arsenic mobility in brownfield soils amended with green waste compost or biochar and planted with Miscanthus.
abstract: Degraded land that is historically contaminated from different sources of industrial waste provides an opportunity for conversion to bioenergy fuel production and also to increase sequestration of carbon in soil through organic amendments. In pot experiments, As mobility was investigated in three different brownfield soils amended with green waste compost (GWC, 30% v/v) or biochar (BC, 20% v/v), planted with Miscanthus. Using GWC improved crop yield but had little effect on foliar As uptake, although the proportion of As transferred from roots to foliage differed considerably between the three soils. It also increased dissolved carbon concentrations in soil pore water that influenced Fe and As mobility. Effects of BC were less pronounced, but the impacts of both amendments on SOC, Fe, P and pH are likely to be critical in the context of As leaching to ground water. Growing Miscanthus had no measurable effect on As mobility.
authors.affiliation: Faculty of Science, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK. w.hartley@ljmu.ac.uk
authors.forename: William
authors.initials: W
authors.lastname: Hartley
authors.forename: Nicholas M
authors.initials: NM
authors.lastname: Dickinson
authors.forename: Philip
authors.initials: P
authors.lastname: Riby
authors.forename: Nicholas W
authors.initials: NW
authors.lastname: Lepp
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000737:chemistry* / Q000378:metabolism; D002606:Charcoal / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006109:Poaceae / Q000378:metabolism*; D012989:Soil Pollutants / Q000737:chemistry* / Q000378:metabolism
chemical_list: D012989:Soil Pollutants; C540010:biochar; D002606:Charcoal; D001151:Arsenic