Utilization of fly ash zeolite for boron removal from aqueous solution

Kluczka, Joanna; Trojanowska, J.; Zołotajkin, Maria

doi:10.1080/19443994.2014.892033

Cited by 27 publications

(15 citation statements)

References 44 publications

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“…The zinc ions affinity of the hybrid sorbent with guar gum is lower by half. The B parameter allows also for calculation of dimensionless constant separation factor R L [ 35 ], which indicates character of sorption (R L > 1, unfavorable; R L = 1, linear; 0 < R L < 1, favorable; and R L = 0, irreversible). Obtained results (0.07–0.85, 0.13–0.91, and 0.08–0.85 for P+A, P+G, and P beads, respectively) indicate the favorable sorption in the whole investigated range of zinc(II) initial concentration.…”

Section: Resultsmentioning

confidence: 99%

Zinc Sorption Studies on Pectin-Based Biosorbents

2017

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The previously-obtained and characterized hybrid pectin-based beads containing agar-agar and guar gum, as well as sole pectin beads (P, for comparison) were examined for zinc ions sorption and desorption properties. The sorption kinetics and equilibrium in the studied system was described by two kinetic models (pseudo-first- and pseudo-second-order) and two isotherms (Langmuir and Freundlich), respectively. The desorption kinetics and equilibrium was also investigated by applying various inorganic acids (nitric, hydrochloric, and sulfuric acid) of various concentrations. In the case of guar gum additive, no significant change in sorption capacity compared to sole pectin beads was observed (q: 37.0 ± 2.6 and 34.7 ± 2.0 mg/g, respectively). Addition of agar-agar significantly decreased the sorption capacity to 22.3 ± 1.0 mg/g, but stripping of zinc(II) ions from this biosorbent was complete even with very diluted acids (0.01 M). Total desorption of zinc from sole pectin and pectin-guar gum beads required acid solution of higher concentration (0.1 M). Sorption rates for all biosorbents are roughly the same and maximum sorption is achieved after 4–5 h. Obtained results and the advantage of our sorbent’s shape formation ability, make the pectin-based biosorbents interesting alternative for zinc(II) ions removal.

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Section: Resultsmentioning

confidence: 99%

Zinc Sorption Studies on Pectin-Based Biosorbents

2017

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“…However, these materials, especially crosslinked with Ca, had the highest B parameter, thus the strongest affinity to Zn(II) ions. The B parameter was used also for calculation of dimensionless constant separation factor RL [ 21 ], which indicates the character of sorption: RL > 1, unfavorable; RL = 1, linear; 0 < RL < 1, favorable; and RL = 0, irreversible. Our results (RL: 0.02–0.61; 0.01–0.47; 0.007–0.30; 0.01–0.39; 0.01–0.40; 0.01–0.40 for PMMA1; 2; 3; 4; 5 and 6, respectively) indicate that adsorption of zinc(II) ions on studied materials was favorable.…”

Section: Resultsmentioning

confidence: 99%

Zinc Sorption on Modified Waste Poly(methyl methacrylate)

et al. 2017

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The new one-pot hydrolysis-crosslinking reaction was used to synthesize a new, waste poly(methyl methacrylate) (PMMA)-based material for zinc(II) ions removal. The alkaline hydrolysis of PMMA in diethylene glycol diethyl ether was used to obtain polymer matrix and it was then crosslinked with Ca and Mg ions to obtain the sorbent. As a result, the macroporous materials were obtained with a yield of 87% when waste PMMA was used, and about 95% when the commercial PMMAs were used. The degree of hydrolysis was similar, from 32% to 35%. New materials were then tested for their affinity towards zinc(II) ions. Two kinetic models (pseudo-first and pseudo-second order), as well as two isotherms (Langmuir and Freundlich), were used to describe the kinetics and equilibrium of zinc(II) ion sorption on the studied materials, respectively. All the prepared PMMA-based sorbents showed similar or higher sorption capacity (q up to 87.7 mg/g) compared to commercially available materials in a broad pH range (4–7). The study shows sorption was fast—above 80% of equilibrium capacity was achieved after ca. 0.5 h. Presented results show that waste PMMA may be an interesting raw material for the preparation of sorbents for zinc(II) ions removal.

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“…The statistical analysis considered 62 published articles. The experimental factors taken into consideration were temperature, reaction time, Si/Al and solid/liquid ratio . Statistical analysis was carried out to study their influence on the type of zoolite synthesized; subsequently, contrast analysis was carried out to compare the synthesis conditions between the zeolites synthesized using FA (Table ).…”

Section: Fly Ashmentioning

confidence: 99%

A statistical industrial approach for the synthesis conditions of zeolites using fly ash and kaolinite

Ramírez-Zamora

Solís-López

Robles

et al. 2017

Env Prog and Sustain Energy

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This work describes the statistical analysis carried out on studies of the synthesis of zeolites using fly ash (FA) and kaolinite and shows the main parameters in the hydrothermal synthesis of eight principal zeolites. The chosen zeolites were faujasite (zeolite X), zeolite A, zeolite P, hydroxysodalite, analcime, chabazite, hydroxycancrintie, and sodalite for FA and kaolinite. The statistical analysis consisted of analysis of variance (ANOVA) of the four principal parameters considered: temperature of synthesis, reaction time, Si/Al ratio of the FA and kaolinite and the solid/liquid ratio in the hydrothermal system. For the use of FA, zeolite P, zeolite X, and hydroxysodalite were the three principal synthesized zeolites in the majority of the studies while zeolite A, zeolite P, and sodalite where the three principal zeolites synthesized when kaolinite was used. In general terms, the use of FA required a low temperature and time of synthesis compared to the use of kaolinite. With regard to the Si/Al ratio, the values were similar in both cases, while the solid/liquid ratio for the use of FA was higher than that for kaolinite. Contrast analysis was carried out showing several differences in the synthesis of the eight types of analyzed zeolites.

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Utilization of fly ash zeolite for boron removal from aqueous solution

Cited by 27 publications

References 44 publications

Zinc Sorption Studies on Pectin-Based Biosorbents

Zinc Sorption Studies on Pectin-Based Biosorbents

Zinc Sorption on Modified Waste Poly(methyl methacrylate)

A statistical industrial approach for the synthesis conditions of zeolites using fly ash and kaolinite

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