The use of the pH at the point of zero charge for characterizing the properties of oxide hydroxides

1999 ◽  
Vol 48 (6) ◽  
pp. 1017-1023 ◽  
Author(s):  
S. I. Pechenyuk
Keyword(s):  
Point Of Zero Charge ◽  
Zero Charge

scholarly journals Determination of Point of Zero Charge (PZC) of Concrete Particles Adsorbents

2021 ◽  
Vol 1184 (1) ◽  
pp. 012004
Author(s):  
Ebtehal A. Al-Maliky ◽  
Hatem A. Gzar ◽  
Mohammed G. Al-Azawy
Keyword(s):  
Point Of Zero Charge ◽  
Zero Charge

The Effectiveness Adsorption of Au(III) and Cu(II) Ion by Mangosteen Rind (Garcinia mangostana L.) Using Point of Zero Charge Calculation

2020 ◽  
Vol 840 ◽  
pp. 10-15
Author(s):  
Dian Hana Saraswati ◽  
Mellia Harumi ◽  
Triyono Triyono ◽  
Sri Sudiono
Keyword(s):  
Adsorption Capacity ◽  
Ph Value ◽  
Point Of Zero Charge ◽  
Garcinia Mangostana ◽  
Isotherm Equation ◽  
Solid Adsorbent ◽  
Zero Charge ◽  
Before And After ◽  
Langmuir Isotherm Equation ◽  
Gold Metal

Adsorption of Au(III) and Cu(II) by mangosteen rind adsorbent had been carried out. Mangosteen rind has several functional groups including –OH phenolics, ‒C=C‒ aromatics, and ethers. Dried mangosteen rind which was obtained from maceration was used to determine Point of Zero Charge (PZC). The most effective pH adsorption was determined by mixing adsorbent with Au(III) or Cu(II) solutions with various pH. The adsorption capacity was affected by the interaction between adsorbent and adsorbate. The solid adsorbent before and after interaction was characterized by FTIR, XRD, and microphotography. The PZC pH value of adsorbent was 3.7 while the optimum pH for Au(III) and Cu(II) were at pH 2 and pH 5, respectively. The adsorption capacity (qmax) value was 333.33 mg/g by following the Langmuir isotherm equation. The crystalline structure of adsorbent was analyzed using XRD and gave 4 peaks characteristics of gold metal on 2ϴ = 38º, 44º, 64º, and 77º after adsorption which indicated the reduction of Au(III) ions into Au(0).

Overcharging and charge reversal in the electrical double layer around the point of zero charge

2010 ◽  
Vol 132 (5) ◽  
pp. 054903 ◽  
Author(s):  
G. Iván Guerrero-García ◽  
Enrique González-Tovar ◽  
Martín Chávez-Páez ◽  
Marcelo Lozada-Cassou
Keyword(s):  
Double Layer ◽  
Electrical Double Layer ◽  
Point Of Zero Charge ◽  
Charge Reversal ◽  
Zero Charge
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