title: Reduction in uptake by rice and soybean of aromatic arsenicals from diphenylarsinic acid contaminated soil amended with activated charcoal.
abstract: Activated charcoal (AC) amendment has been suggested as a promising method to immobilize organic contaminants in soil. We performed pot experiments with rice and soybean grown in agricultural soil polluted by aromatic arsenicals (AAs). The most abundant AA in rice grains and soybean seeds was methylphenylarsinic acid (MPAA). MPAA concentration in rice grains was significantly reduced to 2% and 3% in 0.2% AC treated soil compared to untreated soil in the first year of rice cultivation. In the second year, MPAA concentration in rice grains was significantly reduced to 15% in 0.2% AC treated soil compared to untreated soil. MPAA concentration in soybean seeds was significantly reduced to 44% in 0.2% AC treated soil compared to untreated soil. AC amendment was effective in reducing AAs in rice and soybean.
authors.affiliation: National Institute for Agro-Environmental Sciences, Soil Environmental Division, 3-1-3 Kannondai, Tsukuba, Ibaraki 305-8604, Japan. arao@affrc.go.jp
authors.forename: Tomohito
authors.initials: T
authors.lastname: Arao
authors.forename: Yuji
authors.initials: Y
authors.lastname: Maejima
authors.forename: Koji
authors.initials: K
authors.lastname: Baba
mesh_terms: D001152:Arsenicals / Q000737:chemistry / Q000378:metabolism*; D002606:Charcoal / Q000737:chemistry*; D004784:Environmental Monitoring; D052918:Environmental Restoration and Remediation / Q000379:methods*; D012275:Oryza / Q000378:metabolism; D010316:Particle Size; D010944:Plants / Q000378:metabolism*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000737:chemistry / Q000378:metabolism*; D013025:Glycine max / Q000378:metabolism
chemical_list: D001152:Arsenicals; D012987:Soil; D012989:Soil Pollutants; D002606:Charcoal; C493087:diphenylarsinic acid