scholarly journals Influence of the Natural Zeolite Particle Size Toward the Ammonia Adsorption Activity in Ceramic Hollow Fiber Membrane

Membranes ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 63
Author(s):  
Mohd Ridhwan Adam ◽  
Mohd Hafiz Dzarfan Othman ◽  
Siti Hamimah Sheikh Abdul Kadir ◽  
Mohd Nazri Mohd Sokri ◽  
Zhong Sheng Tai ◽  
...  
Keyword(s):  
Particle Size ◽  
Hollow Fiber ◽  
Natural Zeolite ◽  
Ceramic Membrane ◽  
Hollow Fiber Membrane ◽  
Ammonia Removal ◽  
Particle Sizes ◽  
Adsorption Activity ◽  
Adsorption Performance ◽  
Zeolite Particle

Natural zeolite is widely used in removing ammonia via adsorption process because of its superior ion-exchange properties. Ceramic particle size affects the adsorptivity of particles toward ammonia. In this study, hollow fiber ceramic membrane (HFCM) was fabricated from natural zeolite via phase inversion. The effect of natural zeolite particle size toward the properties and performance of HFCM was evaluated. The results show that the HFCM with smaller particle sizes exhibited a more compact morphological structure with better mechanical strength. The adsorption performance of HFCM was significantly improved with smaller particle sizes because of longer residence time, as proven by the lower water permeability. A high adsorption performance of 96.67% was achieved for HFCM with the smallest particle size (36 μm). These findings provide a new perspective on the promising properties of the natural zeolite-derived HFCM for ammonia removal.

scholarly journals Effect of sintering temperature of bauxite hollow fiber membrane on flexural strength and water permeability

2019 ◽  
Vol 15 (2) ◽  
pp. 190-193
Author(s):  
Mohamad Izrin Mohamad Esham ◽  
Mohd Hafiz Dzarfan Othman ◽  
Ahmad Fauzi Ismail ◽  
Mukhlis A Rahman ◽  
Juhana Jaafar ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
Ceramic Membrane ◽  
Sintering Temperature ◽  
Hollow Fiber Membrane ◽  
Oil Field ◽  
Efficient Production ◽  
Oily Wastewater ◽  
Fiber Membrane ◽  
Membrane Pore ◽  
Water Permeation

With abundant Malaysian bauxite minerals as the selected materials, hollow fiber ceramic membrane was fabricated for efficient production of high quality water from oil field oily wastewater. Effect of sintering temperature between 1250°C and 1450°C on membrane porosity, size of membrane pore, hydrophilicity, mechanical strength and water permeation were examined and the results were analyzed to determine the most suitable hollow fiber membrane for the application. Based on obtained findings, the most suitable sintering temperature was 1350°C. The acceptable strength and morphological behavior of finger-like and sponge-like voids were found to be advantageous characteristics for the fabricated bauxite hollow fiber membrane. Its pleasant structure with good outer and inner layers of separation might be beneficial for the oily wastewater purification applications.

Dispersity, mesoporous structure and particle size modulation of hollow mesoporous silica nanoparticles with excellent adsorption performance

2018 ◽  
Vol 47 (38) ◽  
pp. 13345-13352
Author(s):  
Guiju Tao ◽  
Wenjun He ◽  
Yu Wang ◽  
Fengping Yu ◽  
Junwei Ge ◽  
...  
Keyword(s):  
Particle Size ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Mesoporous Silica Nanoparticles ◽  
Mesoporous Structure ◽  
Particle Sizes ◽  
Adsorption Performance ◽  
Hollow Mesoporous Silica ◽  
Mesoporous Structures

Hollow mesoporous silica nanoparticles with different dispersities, mesoporous structures and particle sizes, and excellent adsorption performance have been systematically synthesized.

Synthesis and Structure of Ultrafine Zeolite KL (LTL) Crystallites and their Use for Thin Film Zeolite Processing

1994 ◽  
Vol 371 ◽  
Author(s):  
Michael Tsapatsis ◽  
Tatsuya Okubo ◽  
Mark Lovallo ◽  
Mark E. Davis
Keyword(s):  
Thin Film ◽  
Particle Size ◽  
Colloidal Suspensions ◽  
Particle Sizes ◽  
Synthesis Conditions ◽  
Zeolite Particle ◽  
Water Ph ◽  
20 Nm

AbstractSynthesis conditions were identified leading to agglomerates of nearly cylindrical zeolite nanocrystals with dimensions less than 50 nm in the channel direction and approximately 10 nm in diameter (in the direction perpendicular to the zeolite channels). The nanocrystals form agglomerates with approximate particle sizes ranging from 20 to 400 nm as determined by DLS. Washing with repeated centrifugation and sonication results in stable (over long periods of time) colloidal suspensions of the zeolite particles in water (pH ∼ 7) with zeolite concentrations of lOg/l. The average zeolite particle size of the suspension can be as low as 20 nm as determined by DLS. Films free of microcracks were prepared from these suspensions by evaporation of water.

scholarly journals Optimization of ammonia removal by natural zeolite from aqueous solution using response surface methodology

2016 ◽  
Vol 70 (1) ◽  
pp. 21-29 ◽  
Author(s):  
Zahra Mokhtari-Hosseini ◽  
Ehsan Kazemiyan ◽  
Reza Tayebee ◽  
Toktam Shenavaei-Zare
Keyword(s):  
Aqueous Solution ◽  
Particle Size ◽  
Optimal Condition ◽  
Response Surface ◽  
Removal Efficiency ◽  
Natural Zeolite ◽  
Contact Time ◽  
Ammonia Concentration ◽  
Ammonia Removal ◽  
Time Dose

Ammonium removal from aqueous solution was investigated using natural zeolite. Operating variables were optimized by statistical design for this process. Eight variables including pH, contact time, dose and size of adsorbent, initial ammonia concentration, temperature, agitation and concentration of other adsorbate were screened by Placket-Burman design. The results indicated particle size, contact time, dose of zeolite and initial ammonia concentration are effective on removal efficiency with p-value<0.02. Optimizations of three important factors were conducted by response surface method. The optimal condition of ammonia removal in terms of removal efficiency was found to be at 0.18-0.4 mm particle size, 4 min contact time and 111 g L-1 dose of zeolite. The removal efficiency was found to be 98.25% at optimal condition. The maximum adsorption capacity of ammonium was 1.276 mg g-1 that was obtained at 0.18-0.4 mm zeolite size, 60 min contact time and 20 g L-1 zeolite dosage. The Langmuir and Freundlich isotherms adequately described the adsorption of ammonium ions by HCl-modified natural zeolite.

A study on the PP hollow fiber membrane contactor and its performance for removing ammonia from wastewater or mixed gas: II. Ammonia removal from mixed gas

2001 ◽  
Vol 1 (5-6) ◽  
pp. 195-198
Author(s):  
J. Wang ◽  
Y. Xu ◽  
Z. Xu ◽  
H. Xu
Keyword(s):  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Ammonia Removal ◽  
Soft Water ◽  
Gaseous Ammonia ◽  
Fiber Membrane ◽  
Mixed Gas ◽  
Gas Treatment ◽  
Water Washing ◽  
Operation Conditions

In this paper, we briefly discussed the utilization of the PP HFM contactor for removal of gaseous ammonia directly from mixed gas in ammonia manufacture in order to find an economic way to substitute conventional soft-water washing absorption technology. The Hollow Fiber Membrane (HFM) contactor has very high elimination (99.9%) under optimum operation conditions. 5.1 Nm3/(m2.h) gas treatment ability can be achieved, as outlet and inlet ammonia concentration are 0.02 g/Nm3 and 20.0 g/Nm3 respectively and gas stay-time in the contactor is only 0.04 s when acid supply around the membrane is sufficient. The results of industrial tests indicated that this technology could be used to eliminate mixed gas containing ammonia and replace conventional soft-water washing and absorption techniques.

scholarly journals Evaluation of natural zeolite as microorganism support medium in nitrifying batch reactors: Influence of zeolite particle size

2012 ◽  
Vol 47 (3) ◽  
pp. 420-427 ◽  
Author(s):  
C. Mery ◽  
L. Guerrero ◽  
J. Alonso-Gutiérrez ◽  
M. Figueroa ◽  
J. M. Lema ◽  
...  
Keyword(s):  
Particle Size ◽  
Natural Zeolite ◽  
Batch Reactors ◽  
Support Medium ◽  
Zeolite Particle

scholarly journals Pengaruh Ukuran Partikel Zeolit Alam yang Diaktivasi dan Diimpregnasi HCl dan Mg2+ pada Penjerapan Ion Fosfat

2021 ◽  
Vol 10 (1) ◽  
pp. 13-18
Author(s):  
Fatimah ◽  
Sri Rahmadaniati Effendi Effendi ◽  
Charissa Dini Sofith
Keyword(s):  
Particle Size ◽  
Natural Zeolite ◽  
Contact Time ◽  
Absorption Efficiency ◽  
Isotherm Model ◽  
Phosphate Adsorption ◽  
Phosphate Ion ◽  
Phosphate Ions ◽  
A Value ◽  
Zeolite Particle

Research on phosphate adsorption using natural zeolites which were activated and impregnated with HCl and Mg2 +had been carried out. This study examined the effect of natural zeolite particle size on phosphate ion adsorption. Stages of the study began from sifting zeolites in accordance with the specified size (50/70 mesh, 70/110 mesh and 110/120 mesh), washing, activation and impregnation. Natural zeolite with 110/120 mesh particle size is used to determine the contact time in absorbing phosphate ions. Natural zeolite can absorb phosphate as much as 8.53 mg / l or 85.3% with a contact time of 35 minutes. The variation of the adsorption on the natural zeolite particle size is carried out to get the effect of the natural zeolite particle size on the adsorption of phosphate ions. Phosphate ions which are absorbed by zeolites are analyzed using a UV-Vis spectrophotometer. The highest absorption efficiency (99.26%) was obtained for natural zeolite particle size 110/120 mesh. The natural zeolite adsorption isotherm model of the phosphate ion is tested with the Freundlich and Langmuir equations. Based on the data obtained, the isotherm model suitable for this study is Freundlich with a value of R2 = 0.985.

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