가축분 퇴비의 중금속 함량 및 화학적 형태별 특성 = Heavy Metals Contents and Chemical Characteristics in Compost from Animal Manures

다국어 초록 (Multilingual Abstract)

Objectives: This study was conducted to evaluate the total heavy metals contents and chemical forms in the animal manure compost. Materials and methods: A total of 109 compost samples were collected throughout the country and classified into three groups in accordance with the raw materials; pig manure, poultry manure and mixed(pig+poultry+cattle) manure. The compost samples were analyzed for total metal content and sequential chemical extraction to estimate the quantities of metals. Results: Concentrations of Zn and Cu in several compost samples were higher than the maximum acceptable limits by the Korea Compost Quality Standards. Concentrations of Zn, Cu, and Cd in compost samples were 257～5,102, 68～1,243, and 0.02～2.54㎎/㎏ respectively, while Cr, Ni, As, and Pb were < 20 ㎎/㎏. The concentrations of heavy metals in pig manure compost were higher than those of both the poultry and the mixed manure compost. The predominant forms for extracted metals were Cr, Ni, Zn, As, and Pb, residual; Cu, organic; and Cd, carbonate. Conclusions: Results indicate that the Zn and Cu contents in compost were higher than other heavy metals and the heavy metalcontents were greater in pig manure compost followed by mixed and poultry manure compost. To prevent the accumulation of heavy metals in soil where animal manure compost is applied, strategy for reducing heavy metal concentrations in animal manure and compost must be considered

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