Behaviors and mechanism of acid dyes sorption onto diethylenetriamine-modified native and enzymatic hydrolysis starch

Wang, Zuohua; Xiang, Bin; Cheng, Rumei; Li, Yijiu

doi:10.1016/j.jhazmat.2010.07.015

Cited by 85 publications

(25 citation statements)

References 40 publications

(40 reference statements)

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“…This slight decrease could be attributed to the competition between MO and chloride anions for the sorption sites. Previous studies have shown that if electrostatic attraction is the main adsorption mechanism, ionic strength has a significant negative effect on the adsorption process [29,30]. Thus these results mean that the electrostatic interaction between the surface of MCWs and MO is not the domination interaction in the adsorption of MO onto MCWs and provides support for the hypothesis that hydrophobic interaction between hydrophobic parts of MO and MCWs plays also a role in the adsorption of MO onto MCWs.…”

Section: Effect Ionic Strengthsupporting

confidence: 69%

Removal of methyl orange (MO) from aqueous solution using cationic surfactants modified coffee waste (MCWs)

Lafi

Hafiane

2016

Journal of the Taiwan Institute of Chemical Engineers

130

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Section: Effect Ionic Strengthsupporting

confidence: 69%

Removal of methyl orange (MO) from aqueous solution using cationic surfactants modified coffee waste (MCWs)

Lafi

Hafiane

2016

Journal of the Taiwan Institute of Chemical Engineers

130

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“…The decrease of the sorption efficiency of reactive dyes, together with the increase in pH, has also been confirmed in the sorption studies of RB5 and RY84 on compost ], chitosan sorbents [Filipkowska and Jóźwiak 201] wheat bran [Annadurai et al 2002] and modified starches [Wang et al 2010].…”

Section: Resultsmentioning

confidence: 66%

The Use of Coconut Shells for the Removal of Dyes from Aqueous Solutions

Jóźwiak¹,

Filipkowska²,

Bugajska³

et al. 2018

J. Ecol. Eng.

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The main purpose of the work was to check the possibility of using coconut shells for the removal of the dyes popular in the textile industry from aqueous solutions. The sorption abilities of an unconventional sorbent were tested against four anionic dyes: Reactive Black 5, Reactive Yellow 84, Acid Yellow 23, Acid Red 18 as well as two cationic dyes: Basic Violet 10 and Basic Red 46. The scope of research included investigation pertaining to the effect of pH on the effectiveness of sorption of dyes, conducted in order to determine the time of equilibrium of sorption and determine the maximum sorption capacity of coconut shells with respect to pigments. The most favorable pH of sorption for the anionic dyes and Basic Violet 10 was pH 3 and for Basic Red 46 -pH 6. The equilibrium time of sorption was the shortest in the case of acidic dyes (Acid Yellow 23/ Acid Red 18 -45 min), while the longest in the case of alkaline dyes (Basic Red 46 -90 min, Basic Violet 10 -180 min). The sorption capacity of coconut shells in relation to anionic dyes was for Reactive Black 5 -0.82 mg/g, Reactive Yellow 84 -0.96 mg/g, Acid Yellow 23 -0.53 mg/g and for Acid Red 18 -0.66 mg/g. The tested sorbent showed much higher sorption capacity with respect to the cationic dyes, i.e. Basic Violet 10 (28.54 mg/g) and Basic Red 46 (68.52 mg/g).

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“…The lower regeneration capacities for AG25 loaded CTSN-beads could be attributed to the hydrogen bonds between AG25 and adsorbents. The hydrogen bonds formed by carbonyl groups of AG25 38 were much stronger than the electrostatic interaction. The results indicated that the CTSN-beads can be recovered for multiple uses.…”

Section: Desorption and Reusementioning

confidence: 94%

Preparation and adsorption properties of diethylenetriamine‐modified chitosan beads for acid dyes

Yan

Xiang

et al. 2013

J of Applied Polymer Sci

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This work has demonstrated that the novel chitosan derivative, synthesized by phase transition and grafting diethylenetriamine, has a great potential for the adsorption of acid dyes from aqueous solutions. Four acid dyes with different molecular sizes and structures were used to investigate the adsorption performance of diethylenetriamine-modified chitosan beads (CTSN-beads). Results indicated that the adsorption of dyes on CTSN-beads was largely dependent on the pH value and controlled by the electrostatic attraction. In addition, the adsorption rate (AO10 > AO7 > AR18 > AG25) and adsorption capacities (AO7 > AR18 > AO10 > AG25) were directly related to the molecular size of the dye and the amount of the sulfonate groups on the dye molecules. The equilibrium and kinetic data fitted well with the Langmuir-Freundlich and pseudo-second-order model. Furthermore, thermodynamic parameters indicated that the adsorption processes occurred spontaneously and higher temperature made the adsorption easier. The reuse tests indicated that the CTSN-beads can be recovered for multiple uses.

show abstract

Behaviors and mechanism of acid dyes sorption onto diethylenetriamine-modified native and enzymatic hydrolysis starch

Cited by 85 publications

References 40 publications

Removal of methyl orange (MO) from aqueous solution using cationic surfactants modified coffee waste (MCWs)

Removal of methyl orange (MO) from aqueous solution using cationic surfactants modified coffee waste (MCWs)

The Use of Coconut Shells for the Removal of Dyes from Aqueous Solutions

Preparation and adsorption properties of diethylenetriamine‐modified chitosan beads for acid dyes

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