Application of Illite- and Kaolinite-Rich Clays in the Synthesis of Zeolites for Wastewater Treatment

Reyes, Carlos Alberto Ríos; Fiallo, Luz Yolanda Vargas

doi:10.5772/25895

Cited by 12 publications

(10 citation statements)

References 42 publications

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“…Also, the increase in urea release with additional kaolin is possible because urea is not intercalated into minerals but is retained on the surface and ends of kaolin (Barral et al, 2008). Kaolin is also known to have a neutral or slightly negative charge structure and has a weak bond so that it is unable to bind urea strongly (Reyes and Fiallo, 2011).…”

Section: Slow Release Ability Of Alginate-cellulose-kaolin Beadsmentioning

confidence: 99%

Characterization of Alginate-Cellulose-Kaolin Composites for Slow-Release Urea Fertilizer

Sunardi¹,

Faramitha²,

Santoso³

2021

Indo. J. Chem. Res.

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Research on the effect of cellulose and kaolin addition to alginate-cellulose-kaolin composites' characteristics as a slow-release agent of urea fertilizer has been done. The technique used in composites' preparation is an extrusion technique using 2% CaCl2 solution as a cross-linker. The compositions of alginate-cellulose-kaolin were varied to determine their effect on composites' characteristics such as diameter, color, swelling ratio, entrapment efficiency, and release of urea. The results showed that the diameter of beads in wet condition produced ranges from 2.98 to 3.54 mm, whereas the diameter of dry beads ranges from 1.22 to 1.92 mm. The addition of cellulose and kaolin affected the color of the beads produced based on CIE Lab analysis. The value of the swelling ratio decreased with the addition of cellulose and kaolin. The entrapment efficiency of urea in beads obtained ranged from 37.25 to 45.06%. The release of urea in aqueous media showed that cellulose and kaolin's addition into the alginate affected the amount of released urea.

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Section: Slow Release Ability Of Alginate-cellulose-kaolin Beadsmentioning

confidence: 99%

Characterization of Alginate-Cellulose-Kaolin Composites for Slow-Release Urea Fertilizer

Sunardi¹,

Faramitha²,

Santoso³

2021

Indo. J. Chem. Res.

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“…Generally, zeolites are prepared from freshly prepared sodium aluminosilicate gels using a wide range of silica and alumina sources via a hydrothermal reaction 1–4 . To obtain low‐cost synthetic zeolites, many researchers have explored the synthesis of low‐grade aluminosilicates such as kaolin, 5–14 bauxite, 15,16 bentonite, 1,17 halloysite, 18 illite, 10,19 and diatomite 20–22 …”

Section: Introductionmentioning

confidence: 99%

Synthesis and ion exchange of zeolites produced from kaolin for separation of oxygen from atmospheric air

Feltrin

Souza

Aquino³

et al. 2021

Int J Applied Ceramic Tech

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Lithium‐based zeolites are the most commonly used materials in PSA (pressure swing adsorption) oxygen concentration from atmospheric air. Synthesizing these adsorbents using mineral raw materials adapts to worldwide environmental requests, as only high‐purity chemical reactants such as aluminates and silicates are usually used. The present work aims to synthesize and characterize zeolites using kaolin as raw material by studying the influence of the metakaolinization temperature and SiO2/Al2O3 and H2O/Na2O molar ratios by experimental design. Ion exchange was used to incorporate lithium into synthesized zeolites. Kaolin was treated thermically and characterized, and zeolites were synthesized by a hydrothermal reaction. After synthesis, ionic exchange of Na+ ions by Li+ was performed. The results indicated the presence of three main phases, zeolites A, X, and P. Using ANOVA, it was found that the factors that contributed significantly to the formation of zeolite X were the H2O/Na2O and SiO2/Al2O3 molar ratios. For zeolite A, the major influence was by the metakaolinization temperature and for zeolite P none of the factors was influential. Zeolites that incorporated higher amounts of lithium showed higher N2 adsorption potential, indicating that even without pure phases formed, it was possible to obtain similar adsorption efficiency to commercial zeolite.

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“…11 Reyes and Fiallo found that illite was successfully transformed into highly crystalline faujasite-type zeolite by fusion with NaOH pellets at 600 C followed by hydrothermal treatment. 12 Meanwhile, clay minerals such as montmorillonite and zeolite are capable of adsorbing heavy metals via cation exchange and formation of inner-sphere complexes through Si-O and Al-O groups. 13 Gehlenite has been reported to be prepared by solid-state reaction of mechanochemically treated mixtures of kaolinite, calcite and aluminum hydroxide at 900 C, also showed high absorption capacity for metal ions.…”

Section: Introductionmentioning

confidence: 99%

Removal of Cd(ii) and Pb(ii) ions from natural water using a low-cost synthetic mineral: behavior and mechanisms

Chen

Shi

2017

RSC Adv.

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Application of Illite- and Kaolinite-Rich Clays in the Synthesis of Zeolites for Wastewater Treatment

Cited by 12 publications

References 42 publications

Characterization of Alginate-Cellulose-Kaolin Composites for Slow-Release Urea Fertilizer

Characterization of Alginate-Cellulose-Kaolin Composites for Slow-Release Urea Fertilizer

Synthesis and ion exchange of zeolites produced from kaolin for separation of oxygen from atmospheric air

Removal of Cd(ii) and Pb(ii) ions from natural water using a low-cost synthetic mineral: behavior and mechanisms

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