Potential of fusion technique in production of mesoporous zeolite A powder from poor kaolin through modification by boehmite: Effect of clay mineralogy on particle morphology

Author(s):  
Mahsa Foroughi ◽  
Amin Salem ◽  
Shiva Salem
2013 ◽  
Vol 339 ◽  
pp. 742-747
Author(s):  
Aroonsri Priprem ◽  
Supatra Porasuphatana ◽  
Sakolthep Srirak ◽  
Wiboon Pantu ◽  
Teerasak Damrongrungrueng ◽  
...  

Effect of an anthocyanidin-zeolite complex (A-Z) was investigated by real-time cell analysis in cultured human epidermoid carcinoma keratinocytes (A431) and human forehead fibroblasts (HFF). A mesoporous zeolite, a potential adsorbent applied in household products, was complexed with an anthocyanidin, extracted from blue flowers ofClitoria ternateaLinn. The A-Z was linearly correlated within a range of 0.05 0.3 mg/ml of the anthocyanidin, analyzed by HPLC, in accordance to Langmuir adsorption isotherm (r= 0.992,p> 0.05). In comparison to zeolite or anthocyanidin alone, A431 and HFF showed significantly cell survival with improved IC50upon exposure to A-Z (p< 0.05). The adsorbed anthocyanidin onto the zeolite reduced the toxic potentials of each.


Langmuir ◽  
2005 ◽  
Vol 21 (2) ◽  
pp. 504-507 ◽  
Author(s):  
Yousheng Tao ◽  
Hirofumi Kanoh ◽  
Katsumi Kaneko

2021 ◽  
Author(s):  
Fatemeh Amir Aslanzadeh Mamaghani ◽  
Amin Salem ◽  
Shiva Salem

Abstract The efficient management of solid waste deposited in the landfill of used motor oil recovery units is an important environmental challenge which is originated from the regeneration by bentonite as an effective adsorbent. The current study was attempted to convert the black waste into zeolite based compounds through fusion technique. The collected waste powder were mixed with sodium hydroxide, and boehmite followed by treatment at different temperatures, 600-800 °C. Then, the obtained precursors were hydrothermally converted to zeolite A or hydroxysodalite. The effect of parameters like alkalinity, boehmite, and sodium aluminate ratios, fusion temperature, and aging time on structural characteristics, and cation exchange capacity (CEC) were studied in details. The potential of solid waste in the production of zeolite A is significantly affected by mentioned factors which govern on purity, crystallinity, morphology, and CEC. The cation exchange capacity about 190 mg g-1 can be achieved by alkali, and boehmite ratios of 2.00, and 0.53, respectively. The microstructural analyses showed the morphological evolution from rounded shape to sharp edges by fusion at 800 °C due to appropriate recrystallization. Besides, hydrosodalite powder with extended surface area, 77 m2 g-1, could be produced by limited content of boehmite in the presence of NaAlO2.


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