Origins of surface charge

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Introduction

Origin of charge - Ionic solids

Reference
Substance PZC
Fluorapatite, Ca5(PO4)3(F, OH) pH = 6
Hydroxyapatite, Ca5(PO4)3(OH) pH = 7
Calcite, CaCO3 pH = 9.5
Fluorite, CaF2 pCa = 3
Barite (syntheitc), BaSO4 pBa = 6.7
Silver iodide, AgI pAg = 5.6
Silver chloride, AgCl pAg = 4
Silver sulphide, Ag2S pAg = 10.2

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Origin of charge for oxides



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Adsorption of ionic surfactants



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