Sweet Lime-Mediated Decolorization of Textile Industry Effluents

Nazir

Green Processing and Synthesis

et al. 2020

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AbstractThis study focusses on the synthesis of carboxymethyl guar gum (CMG) via monochloroacetic acid under alkaline conditions. The reaction conditions were also optimized during the course of experiment. Guar derivative with variable degree of substitution (DS) were prepared and were confirmed by Fourier transform infrared (FTIR) spectroscopy. The DS was determined quantitatively by titration method for each derivative. The synthesized guar gum derivatives, being the natural thickners, have been used in textile printing technology. Substituted guar gum has been proved environmental friendly thickener as compared to synthetic thickeners. Penetration properties, fixation ability, colour fastness, levelness and fabric handling was compared with alginate thickener (commercially available). Guar gum thickeners showed enhanced properties versus alginate thickener and can be used as an alternative to synthetic thickeners in view of its green, non-hazardous and economical derivatives. Guar gum is the outstanding natural thickener, stabilizer, gelling agent and could possibly be used in various industrial units including food, cosmetic, textile, oil fracturing and mining.

Section: Resultsmentioning

confidence: 99%

Green synthesis and characterization of carboxymethyl guar gum: Application in textile printing technology

Nazir

Green Processing and Synthesis

et al. 2020

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“…The phytochemicals possess a multiple of bioactive properties, including antioxidant potential due to phenolic compounds. It is a basic need to understand the mechanism of action, therapeutic dose, bioavailability and bio-efficacy of theses phytochemicals [12,[19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Environmental Applications and Bio-Profiling of <i>Tribulus Terrestris</i>: an Ecofriendly Approach

Arshad¹,

Rahman²,

Qayyum³

et al. 2020

Pol. J. Environ. Stud.

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The antibacterial and antioxidant activity of different parts of Tribulus terrestris, such as leaves and roots, was carried out using methanol and n-hexane as solvents. The leaves of plant have greater extraction yield than roots. The antibacterial activity was checked against both gram positive bacteria (Staphylococcus aureus) and gram negative bacteria (Escherichia coli). Antibacterial activity was performed by disk inhibition method. Leaves show greater antibacterial activity (29 mm and 30 mm) against both S. aureus and E. coli, whereas roots show (16 mm and 21 mm) against both species respectively. Antioxidant activity was carried out by 1, 1-diphenyl-2-picrylhydrazyl (DPPH) scavenging free-radical assay. Leaf extract showed greater antioxidant activity (73%) than that of roots (52%). Total phenolic content (TPC) and total flavonoid content (TFC) were determined by spectrophotometer analysis. The results indicate that leaf extract contains higher phenolic and flavonoid contents (723 mg Gallic acid equivalents (GAE)/g and 476 mg Quercetin equivalents (QE)/g as compared to roots extract (235mg GAE/g and 93 mg QE/g).

“…Therefore, the removal of hazardous and wastewater pollutants has achieved considerable attention. This leads to the severe environmental problems for the reason that of carcinogenicity, mutagenicity and toxicity of released organic dyes [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

UV/H₂O₂, UV/H₂O₂/SnO₂ and Fe/H₂O₂ based advanced oxidation processes for the degradation of disperse violet 63 in aqueous medium

Bokhari

Ahmad

Jilani³

et al. 2020

Mater. Res. Express

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The photodegradation of disperse violet 63 dye was investigated in aqueous solution using UV/H 2 O 2 , UV/H 2 O 2 /SnO 2 and Fenton reagent. The maximum decolorization was achieved in 60 min with 50 mg l −1 of dye concentration. The suitability of each process depends upon dye concentration. The photo degradation is very effective at low dye concentration. The degradation percentage increased by enhancing initial amount of hydrogen peroxide and UV irradiation time. The influence of operational parameters like pH, H 2 O 2 concentration, catalyst amount and dye concentration were investigated. After 60 min reaction time, the maximum decolorization of disperse violet 63 with UV/H 2 O 2, UV/H 2 O 2 /SnO 2 and Fe/H 2 O 2 was 81%, 92.7% and 96.4% respectively. The results indicated that Fenton process had more photocatalytic activity for degradation of disperse violet 63 dye than that of UV/H 2 O 2 and UV/H 2 O 2 /SnO 2 . After 60 min, the comparative decomposition order was Fe/H 2 O 2 >UV/H 2 O 2 /SnO 2 >UV/H 2 O 2. It may be concluded that Fenton process could possibly be used for the remediation of toxic pollutants from textile effluents.