scholarly journals Adsorption of Crystal Violet Dye Using Zeolite A Synthesized From Coal Fly Ash

2017 ◽  
Vol 172 ◽  
pp. 012028 ◽  
Author(s):  
Jumaeri ◽  
E Kusumastuti ◽  
S J Santosa ◽  
Sutarno
Keyword(s):  
Fly Ash ◽  
Crystal Violet ◽  
Coal Fly Ash ◽  
Zeolite A ◽  
Crystal Violet Dye

scholarly journals In situ ultrasonic monitoring of zeolite A crystallization from coal fly ash

2012 ◽  
Vol 190 (1) ◽  
pp. 38-46 ◽  
Author(s):  
Nicholas M. Musyoka ◽  
Leslie F. Petrik ◽  
Eric Hums ◽  
Hasan Baser ◽  
Wilhelm Schwieger
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Zeolite A ◽  
Ultrasonic Monitoring

Adsorption of Chromium in Aqueous Solution by Using Zeolite A Prepared from Fly Ash

2018 ◽  
Vol 792 ◽  
pp. 140-144
Author(s):  
Jumaeri ◽  
Eko Sri Kunarti
Keyword(s):  
Aqueous Solution ◽  
Fly Ash ◽  
Contact Time ◽  
Direct Contact ◽  
Adsorption Process ◽  
Coal Fly Ash ◽  
Hydrothermal Process ◽  
Zeolite A ◽  
Adsorption Ability ◽  
Ph Conditions

Adsorption of Cr(III) and Cr(VI) in aqueous solution by the zeolite A from coal fly ash at various conditions has been carried out. Zeolite A was synthesized from fly ash through modified alkaline fusion hydrothermal process in a reactor stainless steel. Adsorption is carried out by direct contact between the adsorbent and adsorbate in an adsorption batch. Zeolite A from fly ash (ZA-FA) of 0.01 g was mixed with 20 mL both Cr(III) and Cr(VI) at various pH, contact time and initial concentration, in a flask Erlenmeyer 50 mL. The result showed that pH conditions of adsorption process, affect the adsorption ability of zeolite A to Cr(III) and Cr(VI) in aqueous solution. The adsorption of Cr(III) and Cr(VI) on zeolite A reached a maximum at pH 6 and time contact 120 minutes. The adsorption of Cr(III) on zeolite A increased from 3.4 mg/g at pH 3 and achieved a maximum adsorption of 42.67 mg/g at pH 6. At higher pH (7-8) the Cr(III) adsorption tends decreases. The adsorption ability of ZA-FA to Cr(III) is higher than that of Cr(VI) in aqueous solution. The Cr(III) adsorption process on ZA-FA follows the pseudo-order 2 kinetics model.

scholarly journals Synthesis of zeolite A from coal fly ash using ultrasonic treatment – A replacement for fusion step

2016 ◽  
Vol 31 ◽  
pp. 342-349 ◽  
Author(s):  
Tunde V. Ojumu ◽  
Pieter W. Du Plessis ◽  
Leslie F. Petrik
Keyword(s):  
Fly Ash ◽  
Ultrasonic Treatment ◽  
Coal Fly Ash ◽  
Zeolite A

Synthesis of Zeolite A from Mongolian Coal Fly Ash by Hydrothermal Treatment

2018 ◽  
Vol 271 ◽  
pp. 1-8 ◽  
Author(s):  
Ulambayar Rentsenorov ◽  
Batmunkh Davaabal ◽  
Jadambaa Temuujin
Keyword(s):  
Fly Ash ◽  
Hydrothermal Treatment ◽  
Cation Exchange Capacity ◽  
Coal Fly Ash ◽  
Batch Composition ◽  
Exchange Capacity ◽  
Zeolite Synthesis ◽  
Zeolite A ◽  
Acid Pretreatment ◽  
Type Zeolite

Raw coal fly ash and acid pretreated fly ash were used to synthesize A-type zeolite by hydrothermal treatment. In order to synthesize zeolite A an aqueous gel having a molar batch composition of Na2O:Al2O3:1.926SiO2:128H2O was utilized. Fly ash and zeolitic products were characterized by SEM, XRF, XRD and cation exchange capacity (CEC). After hydrothermal treatment, several types of zeolites were formed: zeolite A, analcime, faujasite and hydroxy-sodalite. The highest content of zeolite A was formed in the mixture treated at 80°C for 8 hours. CEC values of the zeolitic products were 28-38 times higher than that of in raw fly ash. Acid pretreatment which leads to low calcium and iron content is preferable method for processing of fly ash for the zeolite synthesis. Synthesized zeolite can be used for ion exchangers for water treatment.

scholarly journals Effect of pH on Adsorption of Cr(III) and Cr(VI) by zeolite A (from Fly Ash) Modified Surfactant HDTMA

2016 ◽  
Vol 1 (3) ◽  
pp. 145
Author(s):  
Jumaeri Jumaeri ◽  
Juari Santosa ◽  
Sutarno Sutarno ◽  
Ella Kusumastuti
Keyword(s):  
Aqueous Solution ◽  
Fly Ash ◽  
Metal Ion ◽  
Coal Fly Ash ◽  
Hydrothermal Process ◽  
Exchange Capacity ◽  
Hexadecyltrimethylammonium Bromide ◽  
Zeolite A ◽  
Modified Zeolite ◽  
Ph Conditions

Adsorption of Cr(III) and Cr(VI) in aqueous solution by the zeolite A from coal fly ash modified hexadecyltrimethylammonium bromide (HDTMAB) at various pH conditions has been carried out. Zeolite A was synthesized from fly ash through modified alkaline fusion hydrothermal process in a reactor stainless steel. The surface modification was performed using cationic surfactant HDTMAB twice as much as the cationic exchange capacity of the elite A resulted. The surfactant modified zeolite A was then applied to adsorption the metal ion chromium as Cr(III) and Cr(VI) in aqueous solution. The results showed that the  acidity (pH)  of adsorption conditions, affect the ability of adsorption surfactant modified zeolite A (SMZA) to Cr(III) and Cr(VI) in aqueous solution. The optimum pH conditions for the adsorption of Cr(III) and Cr(VI) on SMZA exist at pH 6. Surfactant modified zeolite A capable to adsorb either cation Cr(III) or anion Cr(VI).  Adsorption of SMZA on Cr(III) increased from 36.30% to 97.04% with the increase the acidity of pH of 2 to 6. Adsorption SMZA to Cr(VI) is lower than the adsorption of the Cr<sup>3+</sup>, adsorption increasing from 19.63 to 64.07% with increase pH of 2 to 6

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