Chemical Leaching of Antimony and Other Metals from Small Arms Shooting Range Soil
نویسندگان
چکیده
Military small arms shooting range (SASR) soils are heavily polluted by metals like copper, lead, antimony, and zinc. This study was carried out to define efficient operating conditions to solubilize these metals by a chemical leaching technique. The comparison of different leaching reagents (HCl, H2SO4, CH3COOH, and EDTA) has revealed that sulfuric acid leaching coupled with the addition of sodium chloride is the most interesting option for the solubilization of Cu, Pb, Sb, and Zn from the finest fractions (<125 μm) of SASR soil. The initial metal contents of the soil sample were 1,760 mg Cukg, 43,300 mg Pbkg, 780 mg Sbkg, and 355 mg Znkg. The important operational parameters for leaching ([H2SO4], [NaCl], pulp density, reaction time, and temperature) were also studied. The optimum leaching conditions identified were 1 M H2SO4 and 4 M NaCl with a 10 % (w/v) soil pulp density at ambient temperature. In these conditions, 83, 75, 61, and 72 % of Cu, Pb, Sb, and Zn were respectively solubilized after only 1 h of treatment. The use of five successive leaching steps and two washing steps removed 96, 99, 84 and 86 % of Cu, Pb, Sb, and Zn respectively from the soil.
منابع مشابه
Origin and spatial distribution of metals in agricultural soils
Presence of toxic metals in agricultural soils can impose adverse health impact on consumers. The main purpose of this study was to determine spatial distribution of elements Fe, Sb, Mn in agriculture soils and crops of Hamedan Province in Iran. Soil samples (0-20 cm depth) were collected from an area of 2831 km2. Iron, Antimony and Manganese in samples of soil and agricultural crop...
متن کاملپیشتغلیظ و اندازهگیری آنتیموان در آب آشامیدنی بطری شده با استفاده از نانوذرات آلومینیم اکسید اصلاح شده
Abstract Introduction: Antimony trioxide (Sb2O3) has been utilized as a catalyst in polyethylene terephtalate (PET) production, and the studies conducted on the bottled water has demonstrated that antimony can be leached from PET bottles into drinking water. Methods: In this study, a simple method was applied in order to determine the trace amount of antimony in bottled drinking water bas...
متن کاملAssessment of metal contaminations leaching out from recycling plastic bottles upon treatments.
BACKGROUND, AIMS, AND SCOPE Heavy metal contaminants in environment, especially in drinking water, are always of great concern due to their health impact. Due to the use of heavy metals as catalysts during plastic syntheses, particularly antimony, human exposure to metal release from plastic bottles has been a serious concern in recent years. The aim and scope of this study were to assess metal...
متن کاملEvaluation of small arms range soils for metal contamination and lead bioavailability.
Although small arms ranges are known to be contaminated with lead, the full extent of metal contamination has not been described, nor has the oral bioavailability of lead in these soils. In this work, soil samples from ranges with diverse geochemical backgrounds were sieved to <250 microm and analyzed for total metal content. Soils had consistently high levels of lead and copper, ranging from 4...
متن کاملAntimony leaching from contaminated soil under manganese- and iron-reducing conditions: column experiments
Antimony leaching from contaminated soil under manganeseand iron-reducing conditions: column experiments Kerstin Hockmann, Susan Tandy, Markus Lenz and Rainer Schulin Institute of Terrestrial Ecosystems, ETH Zurich, Universitätsstrasse 16, CH-8092 Zurich, Switzerland. Institute for Ecopreneurship, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland (FHNW), ...
متن کامل