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http://dx.doi.org/10.5322/JES.2010.19.11.1385

A Study on Decreasing Metals from Hanwoo Slurry with Chemical Additives  

Kim, Chang-Mann (Ginseng & Organic Co., Ltd, Industry Academy Cooperation, Joongbu University)
Choi, Jung-Hoon (Department of Chemistry, Hanyang University)
Ko, Soo-Hyun (Department of Civil Engineering, Kyungpook National University)
Choi, In-Hag (Ginseng & Organic Co., Ltd, Industry Academy Cooperation, Joongbu University)
Publication Information
Journal of Environmental Science International / v.19, no.11, 2010 , pp. 1385-1390 More about this Journal
Abstract
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 ($FeSO_4{\cdot}7H_2O$), aluminum sulfate [$Al_2(SO_4)_3{\cdot}14H_2O$, alum] and aluminum chloride ($AlCl_3{\cdot}6H_2O$) 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.
Keywords
Chemical additives; Dry matter; pH; Heavy metal; Hanwoo slurry;
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