지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
이용수
초록· 키워드
오류제보하기
Transport of heavy metals such as Cd is affected by several rate-limiting processes including adsorption and desorption by exchange reactions in soils. In this study, column transport and batch kinetic experiments were performed to assess Cd mobility in a double-layered soil with a reclaimed saline and sodic soil (SSS) as top soil and macroporous granule (MPG) as a bottom layer. For individual soil layer having different physical and chemical properties, Cd was considered to be nonlinear reactivity with the soil matrix in layered soils. The dispersive equation for reactive solutes was solved with three types of boundary conditions for the interface between soil layers. The adsorption of Cd with respect to the saline-sodic sandy loam and the MPG indicated that the nature of the sites or the mechanisms involved in the sorption process of Cd was different and the amounts of Cd for both of samples increases with increasing amounts of equilibrium concentration whereas the amount of Cd adsorbed in saline-sodic sandy loam soil was higher than that in MPG. The results of breakthrough curve indicating relative Cd retardation accompanied by layer material and sequence during leaching showed that the number of pore volumes to reach the maximum relative concentration of 1 increased in the order of MPG, SSS, and double layer of SSS-MPG. Breakthrough curves (BTCs) from column experiments were well predicted with our double-layered model where independently derived solute physical and retention parameters were implemented.
목차
Introduction
Theory
Solute-Retention Mechanisms
Materials and Methods
Results and Discussion
Summary and Conclusion
References
참고문헌 (17)
참고문헌 신청
Altin, O. / 1998 / Use of general adsorption isotherms for heavy metal clay mineral interactions / Journal of Colloid & Interface Science 198:130~140
Bosma, W.J.P. / 1992 / Analytical approximations for nonlinear adsorbing solute transport in layered soils / J.l of Contam.t Hydrology 10(2):99~118
Buchter, B / 1996 / Cadmium Transport in an Unsaturated Stony Subsoil Monolith / Soil Sci. Soc. of Am. J 60:716~721
Chlopecka, A / 1997 / Influence of zeolite, apatite and Fe oxide on Cd and Pb uptake by crops / Sci Total Environ 207(3):195~206
Duffus, J.H / HEAVY METALS,In MEANINGLESS TERM / Pure Appl. Chem 74(5):793~807
Bosma, W.J.P. / 1992 / Analytical approximations for nonlinear adsorbing solute transport in layered soils / J.l of Contam.t Hydrology 10(2):99~118
Buchter, B / 1996 / Cadmium Transport in an Unsaturated Stony Subsoil Monolith / Soil Sci. Soc. of Am. J 60:716~721
Chlopecka, A / 1997 / Influence of zeolite, apatite and Fe oxide on Cd and Pb uptake by crops / Sci Total Environ 207(3):195~206
Duffus, J.H / HEAVY METALS,In MEANINGLESS TERM / Pure Appl. Chem 74(5):793~807
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UCI(KEPA) : I410-ECN-0101-2014-521-000706033