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KMID : 1024520100190112385
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Journal of the Environmental Sciences
2010 Volume.19 No. 11 p.2385 ~ p.1390
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A Study on Decreasing Metals from Hanwoo Slurry with Chemical Additives
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Kim Chang-Mann
Choi Jung-Hoon
Ko Soo-Hyun
Choi In-Hag
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Abstract
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Repeated additions of untreated slurry to soil affected ecology and caused high levels of heavy metal in soil and ground water. The objective of this study was to evaluate heavy metal from hanwoo slurry with ferrous sulfate (FeSO4·7H2O), aluminum sulfate [Al2(SO4)3·14H2O, alum] and aluminum chloride (AlCl3·6H2O) as a way to improve environmental management in hanwoo industry. The treatment rates, which were incorporated totally within the hanwoo slurry, were 1.0 g and 1.5 g of ferrous sulfate, alum and aluminum chloride/25 g of hanwoo slurry. The various rates of chemical additives significantly increased dry matter (9.98~13.94%) and decreased pH (3.48~6.52) compared with the controls. The use of chemical additives decreased Fe (11~29%), Al (7~12%), Zn (13~36%), and Cu (4~32%) contents, except for Fe in hanwoo slurry with ferrous sulfate and Al in hanwoo slurry with alum and aluminum chloride. In addition, the reduction in heavy metal should be associated with reduction in pH. In conclusion, the results of this study suggest that alum and aluminum chloride additives at rate of 1.5 g were cost-effective management practice that significantly reduces heavy metal from hanwoo slurry, while it may be improved environmental management.
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KEYWORD
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Chemical additives, Dry matter, pH, Heavy metal, Hanwoo slurry
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