Behavior of Cadmium, Zinc, and Copper in soils -I. Effect of Organic Matter Treatment on Adsorption of Cadmium, Zinc, and Copper in soils-

토양내(土壤內) 카드뮴, 아연(亞鉛) 및 구리의 행동(行動)에 관한 연구(硏究) -제2보(第-報). 토양내(土壤內) 카드뮴, 아연(亞鉛) 및 구리의 흡착(吸着)에 미치는 유기물처리(有機物處理)의 영향(影響)-

  • Yoo, Sun-Ho (Department of Agricultural Chemistry, College of Agriculture, Seoul National University) ;
  • Hyun, Hae-Nam (Department of Agricultural Chemistry, College of Agriculture, Seoul National University)
  • 유순호 (서울대학교 농과대학 농화학과) ;
  • 현해남 (서울대학교 농과대학 농화학과)
  • Published : 1985.06.30

Abstract

Laboratory experiments were conducted to investigate the effect of compost and humic acid treatment on adsorption of Cd, Zn, and Cu in soils. Three soils differing in physical and chemical properties used in this experiments were Bonyrang (Typic Udifluvents) SL, Gangseo (Aquatic Eutrochrepts) L, and Gyorae (Typic Distrandepts) SiL. Adsorption of Cd, Zn, ana Cu on the soils followed Langmuir isotherm up to 75 ppm of initial concentration. The adsorption maxima of Cd, Zn, and Cu for the Bonryang soil, the lowest in pH, organic matter content, and CEC, were the lowest of the three soils. Although the Gyorae soil derived from volcanic ash was the highest in organic matter content and CEC, the adsorption maxima of heavy metals for the Gyorae soil were lower than those for the Gangseo soil of which organic content and CEC were intermidiate. The adsorption maxima/CEC ratios for the Bonryang, the Gangseo, the Gyorae soils were found to be in the range of $23{\sim}27%,\;28{\sim}57%$, and $11{\sim}14%$ respectively The bonding energy constants of Cd, Zn, and Cu for the soils were in the order of Gangseo>Bonryang>Gyorae soils. The adsorption maxima of Cd, Zu, and Cu for the Bonryang soil increased with compost treatment by $100{\sim}210%,\;90{\sim}230%$, and $130{\sim}290%$ respectively, while little difference was observed when the soil was treated with humic acid Bonding energy constants of Cd, Zn, and Cu for the Bonryang soil increased significantly with compost treatment, and showed insignificant correlation with humic acid treatment.

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