Removal of Lead(II) by Mordenites

Dai, Shikun; Kato, Yoshiaki; Guang, D.; Amal, Rose

doi:10.1002/apj.5500060304

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…It was found that nearly 80–90 minute was enough to obtain highest yield in both dilute and concentrated solutions. The results obtained were in agreement with the work done by Dai [ 13 ] which reported that optimum time required to reach the equilibrium was 100 min. Also Wang [ 14 ] reported that adsorption time has little effect on yield and that the adsorption required 90 min.…”

Section: Discussionsupporting

confidence: 92%

“…Dai et al . [ 13 ] also observed that increase in initial lead concentration from 3 to 200 mg/L decreased the lead removal down to 70 percent. Also (Figure 1 ), the results of the study showed that this yield could also be achieved up to 500 mg/L of initial lead concentrations.…”

Section: Discussionmentioning

confidence: 99%

“…No comparison can be made with the research by Dai et al . [ 13 ] since the temperature set constant at 25°C. For moderately concentrated solutions (1005 mg/L) this increase in yield was only 5 percent.…”

Section: Discussionmentioning

confidence: 99%

“…initial lead ion concentrations: 10–100 mg/L. It can be concluded that, modification of mordenite or adjustment of adsorption medium (lowering up to pH 3) [ 13 ] produce nearly the same adsorption yield. But lowering the pH of the medium was useful for solutions containing 3 mg lead /L [ 13 ], whereas modification of mordenite was applicable up to 100 mg/L of lead solutions.…”

Section: Discussionmentioning

confidence: 99%

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Optimization of lead adsorption of mordenite by response surface methodology: characterization and modification

Turkyilmaz

Kartal

Yıldız

2014

J Environ Health Sci Engineer

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BackgroundIn order to remove heavy metals, water treatment by adsorption of zeolite is gaining momentum due to low cost and good performance. In this research, the natural mordenite was used as an adsorbent to remove lead ions in an aqueous solution.MethodsThe effects of adsorption temperature, time and initial concentration of lead on the adsorption yield were investigated. Response surface methodology based on Box-Behnken design was applied for optimization. Adsorption data were analyzed by isotherm models. The process was investigated by batch experiments; kinetic and thermodynamic studies were carried out. Adsorption yields of natural and hexadecyltrimethylammonium-bromide-modified mordenite were compared.ResultsThe optimum conditions of maximum adsorption (nearly 84 percent) were found as follows: adsorption time of 85-90 min, adsorption temperature of 50°C, and initial lead concentration of 10 mg/L. At the same optimum conditions, modification of mordenite produced 97 percent adsorption yield. The most appropriate isotherm for the process was the Freundlich. Adsorption rate was found as 4.4. Thermodynamic calculations showed that the adsorption was a spontaneous and an exothermic process.ConclusionsQuadratic model and reduced cubic model were developed to correlate the variables with the adsorption yield of mordenite. From the analysis of variance, the most influential factor was identified as initial lead concentration. At the optimum conditions modification increased the adsorption yield up to nearly 100 percent. Mordenite was found an applicable adsorbent for lead ions especially in dilute solutions and may also be applicable in more concentrated ones with lower yields.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of lead adsorption of mordenite by response surface methodology: characterization and modification

Turkyilmaz

Kartal

Yıldız

2014

J Environ Health Sci Engineer

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Pb(II) sorption on molecular sieve analogues of MCM-41 synthesized from kaolinite and montmorillonite

Zuo

et al. 2011

Applied Clay Science

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Adsorptive and Membrane-Type Separations: A Bibliographical Update (1998)

Ray

1999

Adsorption Science & Technology

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This paper continues a series of annual bibliographic updates of the published literature (since 1985) on adsorptive and membrane-type separations (see Ray 1990-1998). This paper provides a useful and quick reference source to the 1998 journal literature (from the 50 most important chemical engineering journals) for researchers in this area. The papers included here have been divided into the following subject groups: theory; design data; adsorbents; PSA and cyclic systems. and applications; liquid-phase adsorption; ion exchange. chromatography and related separations; membranes; and membrane-type separations. A new edited book (Dabrowski 1999) concerned with adsorption and related separations also contains extensive bibliographies prepared by this author. A complete bibliographic listing of the chemical engineeringjournal literature from 1959 to 1998 (with subsequent six-monthly updates) is available on a CD-ROM database" and full details can be obtained from the author.

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Removal of Lead(II) by Mordenites

Cited by 4 publications

References 7 publications

Optimization of lead adsorption of mordenite by response surface methodology: characterization and modification

Optimization of lead adsorption of mordenite by response surface methodology: characterization and modification

Pb(II) sorption on molecular sieve analogues of MCM-41 synthesized from kaolinite and montmorillonite

Adsorptive and Membrane-Type Separations: A Bibliographical Update (1998)

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