Modified chitosan for the collection of reactive blue 4, arsenic and mercury from aqueous media

Dhanapal, V.; Subramanian, K.

doi:10.1016/j.carbpol.2014.09.027

Cited by 28 publications

(16 citation statements)

References 26 publications

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“…As we all know, industrial processes such as mining, electroplating, electric device manufacturing, and battery manufacturing are all major sources of heavy metal pollution. [1][2][3] Cobalt, one of the heavy metals and an oligo element, is necessary for metabolic processes in humans to ensure good health as it is an important component of vitamin B 12 .…”

Section: Introductionmentioning

confidence: 99%

Fast removal of Co(ii) from aqueous solution using porous carboxymethyl chitosan beads and its adsorption mechanism

2018

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Porous carboxymethyl chitosan (PCMC) beads were synthesized via ionic coacervation/chemical crosslinking, using polyethylene glycol (PEG) as a porogen and calcium chloride and glutaraldehyde as physical and chemical cross-linkers. The as-synthesized PCMC beads were characterized using SEM, EDS, BET, TGA, FTIR and XPS analysis and then tested for the removal of Co(II) from aqueous solution. The effects of the initial pH, Co(II) concentration and temperature were investigated. It was found that the adsorption equilibrium is reached within 6 h and the maximum adsorption capacity is 46.25 mg g À1 .In addition, the kinetics and equilibrium data are well described by pseudo-second-order kinetics and the Langmuir isotherm model. Moreover, the desorption and re-adsorption performance was also studied, and the results revealed that the prepared new adsorbent still showed good adsorption performance after five cycles of regeneration. Finally, the adsorption mechanism, including chemical and physical adsorption, was proposed on the basis of the microstructure analysis, adsorption kinetics and isotherm results, and chemical adsorption was found to be the main adsorption mechanism during the process of the removal of Co(II).

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Section: Introductionmentioning

confidence: 99%

Fast removal of Co(ii) from aqueous solution using porous carboxymethyl chitosan beads and its adsorption mechanism

2018

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“…The degree of swelling of hydrogel under equilibrium swelling (3 h) conditions was measured in double distilled water using a tea bag as described elsewhere by taking 0.1 g of sieved sample in 200 mL of distilled water at 30 °C. The swelling profiles were constructed by plotting water absorbed during various time intervals at 30 °C against time.…”

Section: Methodsmentioning

confidence: 99%

A composite approach for remediation of cane distillery spent wash using chitosan modified biomass, electrolysis, and Oscillatoria boryana

Venkatachalam¹,

gounder²

2016

J of Applied Polymer Sci

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A cost effective multistep bio-physicochemical method comprising adsorption on carbon, banana pseudo-stem (BPS), and modified chitosan hydrogels (MHPS) as adsorbents, bioremediation using Oscillatoria boryana (OB) and constant current electrolysis was employed successfully to remove oxygen demanding organic wastes, color, total dissolved solids (TDS), melanoidin, and acidic/ basic impurities from distillery spent wash (DSW). The adsorbent were characterized for their structures [Shimadzu FTIR (Fourier transform-Infrared spectroscopy)28400S], thermal stability [TGA (Thermogravimetric analyzer)-Q 500 V20.0 Build 36] and surface morphology [ZEISS EVO series SEM (Scanning Electron Microscopy)-EVO 50]. The percentage color reduction by visible spectrometry and residual coloring matter on platinum-cobalt color unit scale were found to be 97.2% and 250 ppm, respectively till OB bioremediation stage. The remaining residual color (2.8%) was removed in the subsequent electrolysis (1.95%) and adsorption on MHPS (0.85%) stages. The net percent reduction in color (>99%), COD (Chemical Oxygen Demand) and BOD (Biochemical Oxygen Demand) in the present composite approach for DSW treatment were found to be much higher than the reported values. Analysis of the adsorption data for the synthesized activated carbon through Langmuir and Freundlich isotherm models revealed Langmuir adsorption isotherm with pseudo-first-order kinetics. The evaluated thermodynamic parameters (Van't Hoff plot) for adsorption revealed that the adsorption was spontaneous and exothermic.

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“…In this part, chitosan is mainly modified by acrylonitrile (Hanh et al 2015), cerium (Sharma et al 2014), sodium silicate (Boyacı et al 2010), montmorillonite (An and Dultz 2008), pumice (Turan et al 2014), mixed material (Kartal and Imamura 2005;Sabarudin et al 2005;Shinde et al 2013;Lin et al 2008;Liu et al 2012;Dhoble et al 2011;Dhanapala and Subramanianb 2015), film forming (Jana et al 2011), and Cu(OH) 2 /CuO (Elwakeel and Guibal 2015) (Table 6). Acrylonitrile has the cyano groups (-CN), which can be converted into amidoxime groups (-C(NH 2 ) = N-OH) by treating with hydroxyl amine (NH 2 OH) to improve the sorption capacity (Hanh et al 2015).…”

Section: Chitosan With Othersmentioning

confidence: 99%

“…The most frequently used isotherm model for sorption experimental data correlations is the Langmuir sorption model (Hanh et al 2015;Turan et al 2014;Boyacı et al 2010;An and Dultz 2008;Liu et al 2011a, b;Dhoble et al 2011;Dhanapala and Subramanianb 2015;Elwakeel and Guibal 2015) because of its simplicity, which is expressed by Eq. (28).…”

Section: Sorption Isotherm Modelmentioning

confidence: 99%

Removal of As(III) and As(V) from water by chitosan and chitosan derivatives: a review

Wang

Liu

Zheng

2016

Environ Sci Pollut Res

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As arsenic removal becomes a global concern, the development of removal processes for arsenic treatment is still a major challenge. With regard to environmental compatibility and cheapness, chitosan and chitosan derivatives are considered as a promising removal technology for arsenic. Chitosan and chitosan derivatives possess the properties of low cost and good sorption on the arsenic removal. The present review is concerned about the present understanding of the mechanisms involved in sorption processes. Further on, detailed discussions are given of the effects of various factors on the performance of chitosan and chitosan derivatives in arsenic treatment processes. Finally, special attention is paid to the future challenges of chitosan and chitosan derivatives utilized for industrial arsenic treatment.

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Modified chitosan for the collection of reactive blue 4, arsenic and mercury from aqueous media

Cited by 28 publications

References 26 publications

Fast removal of Co(ii) from aqueous solution using porous carboxymethyl chitosan beads and its adsorption mechanism

Fast removal of Co(ii) from aqueous solution using porous carboxymethyl chitosan beads and its adsorption mechanism

A composite approach for remediation of cane distillery spent wash using chitosan modified biomass, electrolysis, and Oscillatoria boryana

Removal of As(III) and As(V) from water by chitosan and chitosan derivatives: a review

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