AN INVESTIGATION OF KAOLINITE CHARGING BEHAVIOR IN NACL ELECTROLYTE SOLUTION

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ABDOLAHPOUR MOSTAFA; RAHNEMAIE RASOUL; TALEBIATOUEI MALIHE; AGHAMIR FATEME

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Paper Information

Journal: Iranian Journal of Soil and Water Research Year:2014 | Volume:45 | Issue:1 Page(s): 95-101

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Title

AN INVESTIGATION OF KAOLINITE CHARGING BEHAVIOR IN NACL ELECTROLYTE SOLUTION

Author(s)

ABDOLAHPOUR MOSTAFA | RAHNEMAIE RASOUL | TALEBIATOUEI MALIHE | AGHAMIR FATEME | Issue Writer Certificate

Keywords

ADSORPTIONQ2

ION-EXCHANGEQ2

POINT OF ZERO CHARGEQ1

SURFACE CHARGEQ2

Abstract

Colloidal particles prevalent in a soil influence its chemical and physical properties as by the particles' surface electrical charges. With respect to the importance of the issue, from both agriculture and environmental points of view, charging behavior of a kaolinite soil sample was studied in the pH range of 4 to 10 and at three background electrolyte concentrations of: 0.005, 0.05, 0.5 M NaCl, by potentiometric titration. Using a combination of mass and electrolyte titrations, kaolinite POINT OF ZERO CHARGE (PZC) was determined to occur at pH=7.6. Increase in pH from the initial value of 4 caused at first a gradual decrease in positive SURFACE CHARGE and then a gradual increase in the negative SURFACE CHARGE, indicating a net positive SURFACE CHARGE at pH<PZC and a net negative SURFACE CHARGE at pH>PZC. Increase in ionic strength reduced positive SURFACE CHARGE at pH<PZC while enhancing the negative SURFACE CHARGE at pH>PZC. The adverse effect of ionic strength on the SURFACE CHARGE at pH<PZC was ascribed to the competition between proton and sodium ions for ADSORPTION on the kaolinite planer surfaces, where some permanent negative charges exist.

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APA: Copy

ABDOLAHPOUR, MOSTAFA, RAHNEMAIE, RASOUL, TALEBIATOUEI, MALIHE, & AGHAMIR, FATEME. (2014). AN INVESTIGATION OF KAOLINITE CHARGING BEHAVIOR IN NACL ELECTROLYTE SOLUTION. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, 45(1), 95-101. SID. https://sid.ir/paper/225957/en

Vancouver: Copy

ABDOLAHPOUR MOSTAFA, RAHNEMAIE RASOUL, TALEBIATOUEI MALIHE, AGHAMIR FATEME. AN INVESTIGATION OF KAOLINITE CHARGING BEHAVIOR IN NACL ELECTROLYTE SOLUTION. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH[Internet]. 2014;45(1):95-101. Available from: https://sid.ir/paper/225957/en

IEEE: Copy

MOSTAFA ABDOLAHPOUR, RASOUL RAHNEMAIE, MALIHE TALEBIATOUEI, and FATEME AGHAMIR, “AN INVESTIGATION OF KAOLINITE CHARGING BEHAVIOR IN NACL ELECTROLYTE SOLUTION,” IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, vol. 45, no. 1, pp. 95–101, 2014, [Online]. Available: https://sid.ir/paper/225957/en

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