Sorption and desorption of chromate by wood shavings impregnated with iron or aluminum oxide

Kuo, S.; Bembenek, R.

doi:10.1016/j.biortech.2007.10.062

Cited by 27 publications

(17 citation statements)

References 61 publications

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“…Chromium is found in various oxidation stages ranging from −II to +VI. Cr(III) and Cr(VI) are of major environmental significance depending on pH and redox conditions [1,2]. In sediments, chromium can be present in two oxidation states [Cr(III) and Cr(VI)], trivalent chromium being an essential element in animal and human nutrition, and hexavalent chromium being toxic to organisms.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, adsorption is one of the most popular methods for the removal of chromium from the wastewaters [2,11,12]. Metal ions are adsorbed onto the solid adsorbent surface from the wastewater with the quantity of the removed pollutant depending on the adsorption capacity of the adsorbent.…”

Section: Introductionmentioning

confidence: 99%

“…At a basic medium (pH > pH PZC ) the surface is negatively charged. In an acidic medium, crystalline and amorphous Fe-and Al-oxides present a potential affinity to sorb Cr(VI) [2,13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sorption of Cr(VI) onto natural iron and aluminum (oxy)hydroxides: Effects of pH, ionic strength and initial concentration

Ajouyed

Hurel

Ammari

et al. 2010

Journal of Hazardous Materials

237

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sorption of Cr(VI) onto natural iron and aluminum (oxy)hydroxides: Effects of pH, ionic strength and initial concentration

Ajouyed

Hurel

Ammari

et al. 2010

Journal of Hazardous Materials

237

View full text Add to dashboard Cite

“…(Quintelas et al 2006;Aksu and Akpinar 2001). Modification of biosorbent by metal impregnation (Talreja et al 2014) and acid treatment ) improves the percentage removal of pollutants (Kuo and Bembenek 2008;FonsecaCorrea et al 2013;Owlad et al 2010;Cronje et al 2011). Chromium is found in the environment predominantly in two forms Cr(III) and Cr(VI) out of which Cr(VI) is most mutagenic and carcinogenic to the living organism (Acar and Malkoc 2004;Baral et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Statistical optimization of process parameters for the simultaneous adsorption of Cr(VI) and phenol onto Fe-treated tea waste biomass

Gupta

Balomajumder

2017

Appl Water Sci

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In this study, simultaneous removal of Cr(VI) and phenol from binary solution was carried out using Fetreated tea waste biomass. The effect of process parameters such as adsorbent dose, pH, initial concentration of Cr(VI) (mg/L), and initial concentration of phenol (mg/L) was optimized. The analysis of variance of the quadratic model demonstrates that the experimental results are in good agreement with the predicted values. Based on experimental design at an initial concentration of 55 mg/L of Cr(VI), 27.50 mg/L of phenol, pH 2.0, 15 g/L adsorbent dose, 99.99% removal of Cr(VI), and phenol was achieved.

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“…Because of these advantageous properties, Fe-oxide is widely applied for the remediation of contaminated environments. Among various applications, heavy metal removal from waste aqueous solution is under active investigation [2][3][4][5][6] . Y.-H. Huang et al investigated copper (Cu(II)) removal by Fe-oxide 7) .…”

Section: Introductionmentioning

confidence: 99%

Highly Enhanced Heavy Metal Adsorption Performance of Iron Oxide (Fe-Oxide) upon Incorporation of Aluminum

Hong

Yang

Yang³

et al. 2017

Mater. Trans.

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Iron oxide (Fe-oxide) has been widely used in the adsorption of heavy metals from aqueous solution. In this study, we improve the heavy metal adsorption capacity of Fe-oxide by synthesizing its binary oxide with aluminum (Al). In addition, we discuss the effect of characteristic changes caused by Al incorporation on the removal of arsenate (As(V)) and selenate (Se(VI)). Binary oxides with six different Fe:Al ratios (10:0, 9:1, 7:3, 5:5, 3:7 and 1:9) are synthesized by the sol-gel method, followed by a sintering process. The SEM-EDS result reveals that Fe and Al are homogeneously distributed in the oxides. It is found that the incorporation of Al into Fe-oxide not only provides a high speci c surface area (90 200 m 2 /g, 10 times larger than pure Fe-oxide) but also inhibits the phase transition from α-FeOOH to α-Fe 2 O 3 . The combination of the expanded surface area and the α-FeOOH phase, which has a plentiful supply of hydroxyl groups, plays a crucial role in improving As(V) and Se(VI) adsorption. Among various Fe:Al ratio binary oxides, the highest uptake is achieved with 5:5 Fe:Al oxide sintered at 100 C.

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Sorption and desorption of chromate by wood shavings impregnated with iron or aluminum oxide

Cited by 27 publications

References 61 publications

Sorption of Cr(VI) onto natural iron and aluminum (oxy)hydroxides: Effects of pH, ionic strength and initial concentration

Sorption of Cr(VI) onto natural iron and aluminum (oxy)hydroxides: Effects of pH, ionic strength and initial concentration

Statistical optimization of process parameters for the simultaneous adsorption of Cr(VI) and phenol onto Fe-treated tea waste biomass

Highly Enhanced Heavy Metal Adsorption Performance of Iron Oxide (Fe-Oxide) upon Incorporation of Aluminum

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