Insight into the synergistic adsorption-reduction character of chromium(VI) onto poly(pyrogallol-tetraethylene pentamine) microsphere in synthetic wastewater

Abstract The capacity of Cladosporium cladosporioides biomass for removal of Cr(VI) in aqueous solutions was evaluated. A 2 × 2 factorial experiment design was used to study the effects of pH and biomass doses. Lower pH values and larger biomass doses increased the capacity of C. cladosporioides biomass for removal of Cr(VI), reaching a reduction capacity of 492.85 mg g−1, a significantly higher value compared to other biomass reported. Cr(VI) removal kinetic rates followed a pseudo-second order model, like other fungal biomass reported previously. The apparent adsorption process was described well by the Freundlich isothermal model. However, determination of total chromium indicated that adsorption of Cr(VI) was followed by a redox reaction that released proportional quantities of Cr(III) into the experimental supernatant, suggesting a parallel adsorption-reduction process. Comparison of Fourier transform infrared spectroscopy spectra of C. cladosporioides biomass before and after the reduction process demonstrated the involvement of positively charged amino groups in the Cr(VI) adsorption-reduction process.

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Chromium (VI) removal from water by means of adsorption-reduction at the surface of amino-functionalized MCM-41 sorbents

Microporous and Mesoporous Materials ◽

10.1016/j.micromeso.2016.10.012 ◽

2017 ◽

Vol 239 ◽

pp. 138-146 ◽

Cited By ~ 53

Author(s):

Nicolás Fellenz ◽

Francisco J. Perez-Alonso ◽

Pedro P. Martin ◽

José L. García-Fierro ◽

José F. Bengoa ◽

...

Keyword(s):

Chromium Vi ◽

Adsorption Reduction ◽

Mcm 41

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Phytoremediation of chromium(VI) using Colocasia esculenta in laboratory scale constructed wetlands

Journal of Tropical Resources and Sustainable Science (JTRSS) ◽

10.47253/jtrss.v6i1.727 ◽

2021 ◽

Vol 6 (1) ◽

pp. 45-49

Author(s):

Chan Kar Men ◽

Rozidaini Mohd Ghazi

Keyword(s):

Heavy Metals ◽

Constructed Wetlands ◽

Water Scarcity ◽

Colocasia Esculenta ◽

Laboratory Scale ◽

Synthetic Wastewater ◽

Anthropogenic Emission ◽

Chromium Vi ◽

Set Up ◽

Soil And Water

The existing water is becoming polluted nowadays due to high anthropogenic emission of water. The phytoremediation technology is used to treat the contaminated soil and water which containing higher amount of pollutants. The water that contains heavy metals will cause water scarcity and affect on human health when human drink the water. In this study, Colocasia esculenta was chosen for the removal of Cr(VI) in water. The efficiency of C.esculenta in accumulates Cr(VI) in synthetic wastewater was evaluated. The effect of time and concentration of Cr(VI) were identified in this study. Cr(VI) concentration was determined using diphenylcarbazide method (DPC). Experiment were set up in Laboratory Scale Constructed Wetlands with varies the concentration of synthetic wastewater of 1, 2, 5, 10, 50, 500 and 1000 mg/L and was continued for 36 days. The result of removal percentage for the 1, 2, 5 and 10 mg/L reach 100% while for 50, 500 and 1000 mg/L only remove 99.99%, 94.79% and 55.84% respectively. Roots of C.esculenta are able to accumulate Cr(VI) in wastewater which with BCF value was 1.557 mg/L. The BCF value of roots were more than 1, represents the higher accumulation of metal in plant. Therefore, C.esculenta has potential to use in removing Cr(VI) in water.

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Biosorption Potential of Vetiveria zizanioides for the Removal of Chromium(VI) from Synthetic Wastewater

Journal of Hazardous Toxic and Radioactive Waste ◽

10.1061/(asce)hz.2153-5515.0000403 ◽

2018 ◽

Vol 22 (4) ◽

pp. 04018014 ◽

Cited By ~ 5

Author(s):

Uplabdhi Tyagi ◽

Vinita Khandegar

Keyword(s):

Synthetic Wastewater ◽

Vetiveria Zizanioides ◽

Chromium Vi

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Folic Acid-Polyaniline Hybrid Hydrogel for Adsorption/Reduction of Chromium(VI) and Selective Adsorption of Anionic Dye from Water

ACS Sustainable Chemistry & Engineering ◽

10.1021/acssuschemeng.7b02342 ◽

2017 ◽

Vol 5 (10) ◽

pp. 9325-9337 ◽

Cited By ~ 58

Author(s):

Sujoy Das ◽

Priyadarshi Chakraborty ◽

Radhakanta Ghosh ◽

Susmita Paul ◽

Sanjoy Mondal ◽

...

Keyword(s):

Folic Acid ◽

Selective Adsorption ◽

Hybrid Hydrogel ◽

Anionic Dye ◽

Chromium Vi ◽

Adsorption Reduction

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Mechanistic insight into chromium(VI) reduction by oxalic acid in the presence of manganese(II)

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2015.06.066 ◽

2015 ◽

Vol 300 ◽

pp. 144-152 ◽

Cited By ~ 19

Author(s):

Katarzyna Wrobel ◽

Alma Rosa Corrales Escobosa ◽

Alan Alexander Gonzalez Ibarra ◽

Manuel Mendez Garcia ◽

Eunice Yanez Barrientos ◽

...

Keyword(s):

Oxalic Acid ◽

Chromium Vi ◽

Mechanistic Insight ◽

Insight Into

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Magnetite Functionalized Nigella Sativa Seeds for the Uptake of Chromium(VI) and Lead(II) Ions from Synthetic Wastewater

Adsorption Science & Technology ◽

10.1155/2021/6655227 ◽

2021 ◽

Vol 2021 ◽

pp. 1-15

Author(s):

Patience Mapule Thabede ◽

Ntaote David Shooto ◽

Thokozani Xaba ◽

Eliazer Bobby Naidoo

Keyword(s):

Nigella Sativa ◽

Freundlich Isotherm ◽

Synthetic Wastewater ◽

Batch Adsorption ◽

Initial Concentration ◽

X Ray ◽

Operational Conditions ◽

First Order ◽

Chromium Vi ◽

Ketonic Group

The aim of the present study was to utilise pristine and magnetite-sucrose functionalized Nigella Sativa seeds as the adsorbents for the uptake of chromium(VI) and lead(II) ions from synthetic wastewater. Prestine Nigella Sativa seeds were labelled (PNS) and magnetite-sucrose functionalized Nigella Sativa seeds (FNS). The PNS and FNS composites were characterized by Fourier-transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD). The FTIR analysis of both adsorbents revealed the presence of vibrations assigned to 1749 and 1739 cm-1 (-C=O) for ketonic group for both adsorbents. The amide (-NH) peak was observed at 1533 and 1527 cm-1 on FNS and PNS composites, respectively, whilst the carboxyl group (-COOH) were observed at 1408 cm-1 on both adsorbents. The XRD results of FNS and PNS composites showed a combination of spinel structure and y -Fe2O3 phase confirming the formation of iron oxide. The influence of operational conditions such as initial concentration, temperature, pH, and contact time was determined in batch adsorption system. The kinetic data of Cr(VI) and Pb(II) ions on both adsorbents was described by pseudo-first-order (PFO) model which suggested physisorption process. The sorption rate of Cr(VI) ions was quicker, it attained equilibrium in 20 min, and the rate of Pb(II) ions was slow in 90 min. Freundlich isotherm described the mechanism of Pb(II) ions adsorption on PNS and FNS composites. Langmuir best fitted the uptake of Cr(VI) ions on PNS and FNS. The results for both adsorbents showed that the removal uptake of Pb(II) ions increased when the initial concentration was increased; however, Cr(VI) uptake decreased when the initial concentration increased. The adsorption of Cr(VI) and Pb(II) ions on both adsorbents increased with temperature.

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Cr(VI) Removal from Wastewater by Using Rice Husk Ash (RHA)

ASEAN Journal of Chemical Engineering ◽

10.22146/ajche.50154 ◽

2006 ◽

Vol 6 (1) ◽

pp. 53

Author(s):

M. J. Uddin ◽

M. M.R. Khan ◽

M S. Iftekhar ◽

M A Islam

Keyword(s):

Rice Husk ◽

Optimum Parameter ◽

Rice Husk Ash ◽

Toxic Metal ◽

Synthetic Wastewater ◽

Tannery Effluent ◽

Freundlich Isotherms ◽

Chromium Vi ◽

Langmuir And Freundlich Isotherms ◽

Equilibrium Data

Rice husk ash (RHA) was studied as a potential adsorbent for Chromium (VI)removal from wastewater. RHA was able to remove effectively and economically toxic metal from synthetic wastewater. Experiments were done on the removal of Cr(VI) from dichromate solution which is a form of chromium in tannery effluent. The amount of Cr(VI) adsorption increased with the decrease in pH. The optimum parameter was = 2.0 evaluated at pH and the dose rate of the adsorbent was 5 kg RHNm3. The equilibrium data fit well in both the Langmuir and Freundlich isotherms. The study showed that 89.29 x 10-3kg Cr(VI) could be removed by 1 Kg of RHA. Since rice husk (RH) is available and cheap in Bangladesh, it can be used easily as an appropriate adsorbent to remove more than 95% Cr(VI) from tannery wastewater.

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