Studies on room-temperature synthesis of zeolite NaA

Zhang, Xu; Tong, Daqing; Wei, Jia; Tang, Dingxing; Li, Xingyang; Yang, Renchun

doi:10.1016/j.materresbull.2014.01.008

Cited by 28 publications

(16 citation statements)

References 26 publications

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“…Water plays important role in hydrothermal synthesis of zeolite [20]. By controlling water composition from 30, 60, 90, 120 and 200 in the initial reaction mixtures, it will be able to provide an insight into its effect on dissolution of kaolin and formation of sodalite.…”

Section: The Influence Of Water Composition and Sio2/al2o3 Ratios On mentioning

confidence: 99%

“…Rapid adsorption of heavy metals (Pb 2+ ) was observed 20 mins into the reaction and the adsorption continued to increase to reach steady state at 720 mins. Rapid adsorption at the beginning of the reaction suggested the formation of strong interaction between Pb 2+ and the vacancy sites on the sodalite surface [20]. The adsorption capacity (Qe) was determined based on the adsorption at 720 mins when the value reached steady state.…”

Section: Effects Of Contact Timementioning

confidence: 99%

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Direct Synthesis of Sodalite from Indonesian Kaolin for Adsorption of Pb2+ Solution, Kinetics, and Isotherm Approach

Wahyuni

Prasetyoko

Suprapto

et al. 2019

Bull. Chem. React. Eng. Catal.

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Indonesian kaolin was used as precursor for synthesis of sodalite. Synthesis parameters were optimized by varying the Si/Al ratios, stirring and aging conditions, and water composition. X-ray diffraction (XRD), Fourier Transform Infra Red (FTIR), Scanning Electron Microscope-Energy Dispersive Xray (SEM-EDX), and Particle Size Analyzer (PSA) were used to characterize sodalite. The potential of sodalite as adsorbent for heavy metal Pb 2+ ions removal from waste water was investigated in this work. The uptake adsorption capacities of sodalite was 90-100 mg/g from synthesized sodalite crystallized for 24 and 48 hours, and commercial silica. The kinetic of Pb 2+ adsorption was a pseudo second order reaction and the adsorption coefficients was followed Langmuir adsorption isotherm. ous damage to nervous system, kidney function and reproduction organ [1]. It also affects hematopoietic, renal, gastrointestinal, and cardiovascular [2]. Removal of lead from waste water using reverse osmosis, precipitation, ion exchange and electro dialysis have been investigated and were proven effective [1,[3][4][5][6]. However, the processes were economically demanding and the waste deposit resulted from the removal processes were still required for additional disposal treatment.Sorption using solid adsorbents offers a better solution for waste water treatment which in-

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Section: The Influence Of Water Composition and Sio2/al2o3 Ratios On mentioning

confidence: 99%

Section: Effects Of Contact Timementioning

confidence: 99%

Direct Synthesis of Sodalite from Indonesian Kaolin for Adsorption of Pb2+ Solution, Kinetics, and Isotherm Approach

Wahyuni

Prasetyoko

Suprapto

et al. 2019

Bull. Chem. React. Eng. Catal.

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“…However, the current industrial preparation process of NAZ is not green. It largely relies on chemicals, such as sodium silicate and aluminum sulfate obtained from natural alumina-and/or silica-containing minerals, thus leading to huge discharge of wastes and high energy consumption [13][14][15]. Thus, the direct synthesis method of zeolites from natural aluminosilicate minerals without those intermediate chemicals has received wide attention [16].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Na-A zeolite from coal gangue with the in-situ crystallization technique

Qian

2015

Advanced Powder Technology

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“…According to numerous studies [16,17], the most feasible zeolite synthesis methods involve components solved in water where zeolitization reactions take place in colloid systems. Literature sources report that zeolite NaA can be synthesized from some aluminum sources [18]. A disadvantage of using salts is that, after pH adjustment or addition of alkali silicate solutions, alkali salts are formed which have a strong electrolytic effect on gel formation.…”

Section: Resultsmentioning

confidence: 99%

Effects of ultrasonic treatment on zeolite NaA synthesized from by-product silica

Vaičiukynienė

Kantautas

Vaitkevičius

et al. 2015

Ultrasonics Sonochemistry

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The synthesis of zeolite NaA from silica by-product was carried out in the presence of 20 kHz ultrasound at room temperature. Zeolites obtained in this type of synthesis were compared to zeolites obtained by performing conventional static syntheses under similar conditions. The sonication effects on zeolite NaA synthesis were characterized by phase identification, crystallinity etc. The effects of different parameters such as crystallization time and initial materials preparation methods on the crystallinity and morphology of the synthesized zeolites were investigated. The final products were characterized by XRD and FT-IR. It was possible to obtain crystalline zeolite NaA from by-product silica in the presence of ultrasound.

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Studies on room-temperature synthesis of zeolite NaA

Cited by 28 publications

References 26 publications

Direct Synthesis of Sodalite from Indonesian Kaolin for Adsorption of Pb2+ Solution, Kinetics, and Isotherm Approach

Direct Synthesis of Sodalite from Indonesian Kaolin for Adsorption of Pb2+ Solution, Kinetics, and Isotherm Approach

Synthesis of Na-A zeolite from coal gangue with the in-situ crystallization technique

Effects of ultrasonic treatment on zeolite NaA synthesized from by-product silica

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