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Citation: Jiang Xin*, Xue Jiahua, Lin Huahua. DETERMINATION OF ψ_δ AND ψ_d ON CLAY COLLOID SURFACE WITH OVERLAPPING ELECTRIC DOUBLE LAYER[J]. Acta Physico-Chimica Sinica, ;1989, 5(04): 403-408. doi: 10.3866/PKU.WHXB19890406 shu

DETERMINATION OF ψ_δ AND ψ_d ON CLAY COLLOID SURFACE WITH OVERLAPPING ELECTRIC DOUBLE LAYER

1.
Department of Environmental Science; Nanjing University; Department of Basic Science; Nanjing Agricultural University

Received Date: 4 November 1987
Available Online: 15 August 1989

An anion negative adsorption equation in the clay colloid suspension of overlapping flat double layer has been derived according to the electric double layer theory of uy-Chapman. The electric potential at the Outer Helmhotz Plane(OHP), ψ_δ, and electric potential at the midplane, ψ_d, have been solved by FACOM M-34-OS computer using the anion negative adsorption equation on the basis of experiment. The results are concluded as following:(1) The values of ψ_δ and ψ_d increase with the decrease of distance λ (Fig.4 and Fig.5). (2) The change of ψ_d/ψ_δ with distance λ can explain the overlapping degree of flat double layer mor appropriate than that of ψ_d in previous work (Fig.6). (3) Due to compression of the flat double layers at increasing electrolyte concentrations, the values of ψ_δ and ψ_d are considerably reduced at a given distance λ.
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DETERMINATION OF ψδ AND ψd ON CLAY COLLOID SURFACE WITH OVERLAPPING ELECTRIC DOUBLE LAYER

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通讯作者: 陈斌, bchen63@163.com

DETERMINATION OF ψ_δ AND ψ_d ON CLAY COLLOID SURFACE WITH OVERLAPPING ELECTRIC DOUBLE LAYER