Study of the influence of fulvic substances on the adsorption of copper(II) ions at the kaolinite surface

Article Article scientifique Article Study of the influence of fulvic substances on the adsorption of copper(II) ions at the kaolinite surface eng 1984 author Dalang Félix Werner 59072 author Buffle Jacques 24673 Administration de la faculté des sciences (SIAD) author Haerdi Werner 24913 Administration de la faculté des sciences (SIAD) 135-141 10.1021/Es00121A002 22263725 0013-936X https://pubs.acs.org/doi/abs/10.1021/es00121a002 <p>Adsorption and complexation phenomena have been investigated in the ternary system Cu(II)-fulvic acidkaolinite. The reactions were followed by measuring (a) the concentration of exchanged protons, (b) the free copper concentration using a copper ion selective electrode, and (c) the total dissolved copper concentration by atomic absorption spectrophotometry. Fulvic acid concentrations have been determined by UV absorption. The results showed that the fulvic acid adsorption on the kaolinite surface follows a Langmuir isotherm in the concentration range studied, while the copper adsorption follows Freundlich’s law. Adsorbed fulvic material leads to an increase in the total quantity of adsorbed Cu(II) on kaolinite, when systems containing equal free copper ion concentrations are compared. This additional adsorbed Cu(II) plays a rather minor role in the total adsorption of Cu(II). A mathematical model is proposed for the interpretation of the data.</p> Dewey 540 40 Département de chimie minérale, analytique et appliquée 145 false Environmental science & technology 18 3 c8a602cd-70f5-4328-80c2-ca85c279b5a9 Article (Published version) Restricted Dalang_EST_198418135.pdf 959333 application/pdf 7dd70ef0f10fa4aed3e3357b42bd3da9e6f8e95db40e874eb5304c349f8ea8d4 restrictedAccess Faculté des sciences / Section de chimie et biochimie / Département de chimie minérale, analytique et appliquée

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Study of the influence of fulvic substances on the adsorption of copper(II) ions at the kaolinite surface	Environmental science & technology			1984	18	0

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Dalang, Félix Werner