Biosorption of Metal Ions Using Chitosan, Chitin, and Biomass of Rhizopus Oryzae

Mcafee, Brenda J.; Gould, W. Douglas; Nadeau, Jennifer; Costa, Antônio Carlos Augusto da

doi:10.1081/ss-100107768

Cited by 130 publications

(48 citation statements)

References 30 publications

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“…Also, they clearly show that even this acetylated polysaccharide can be efficiently employed for arsenic removal. However, chitosan is generally preferred over chitin in the vast majority of applications [157,158].…”

Section: Chelation Studiesmentioning

confidence: 99%

Antioxidant Polymers: Metal Chelating Agents

Zalloum

Mubarak

2012

Antioxidant Polymers

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Antioxidants are generally used to retard the reaction of organic materials, such as synthetic polymers, with atmospheric oxygen. Such a reaction can cause the degradation of the polymer and can alter many of its properties. This in turn could lead to loss of flavor and the development of rancidity in foods, to an increase in viscosity and acidity, and to the formation of insolubles in lubricants. Natural polysaccharides -chitosan, chitin, and alginates -are biopolymers that are biodegradable, biocompatible, environmentally friendly, and nontoxic. Additionally, these polymers and many of their derivatives act as antioxidant materials; this is mainly attributed to the active hydroxyl and amino groups present in these biopolymers. Since chitosan, chitin, and alginates act as metal-chelating agents, this review will cover the existing and most recent literature on the use of these materials and their derivatives for this purpose, in addition to the synthetic methods for their derivatives, and their use as metal-chelating agents.

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Section: Chelation Studiesmentioning

confidence: 99%

Antioxidant Polymers: Metal Chelating Agents

Zalloum

Mubarak

2012

Antioxidant Polymers

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“…Adsorption of chromium onto various solid adsorbents was reported . Typical investigated adsorbents included activated carbons [5][6][7], maple saw dust [8], bentonite and expanded perlite [9], soy cake [10], diatomite [11], chitin and chitosan [12], fly ash [13], and cement kiln dust [14]. Some of the previous studies focused on the adsorption of Cr(VI) [7,10,15], while others on the adsorption of Cr(III) [9,11,16,17].…”

Section: Introductionmentioning

confidence: 99%

Treating Leather Tanning Wastewater with Stone Cutting Solid Waste

Al-Jabari

Abualfailat

Shaheen

2011

CLEAN Soil Air Water

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This paper presents a new environmental approach for reducing environmental impacts of two local Palestinian industries: It implements the principle of ''treating waste by waste.'' The technical feasibility of chromium removal from wastewater in leather making by its treatment with solid waste from stone cutting industry is demonstrated experimentally, and found to be an efficient approach. Nearly full removal of chromium is obtained at optimum operating conditions using sufficient mass of solid waste (limestone) and allowing enough contact time between the two wastes. This study investigated effects of various parameters on the percentage relative decrease in concentration by using ultra violet (UV)/Vis spectrophotometry. Kinetic curves showed that percentage relative decrease in concentration increased with time until approaching a plateau (adsorption capacity). The adsorption capacity increased with increasing limestone to liquid ratio (solid content), until nearly full removal of chromium was obtained when the solid content was 5 g/100 mL or higher. This was accomplished within few days when the particles were settled. The adsorption capacity was pH dependent; adsorption at pH < 5 was obtained, as a finding which was not reported by previous investigators for Cr(III) adsorption using other particles. The percentage removal was nearly doubled at higher pH values (>5). Further research work is proposed to distinguish between the contributions of the two removal mechanisms of precipitation and adsorption.

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“…It is found in the exoskeleton of shellfish such as shrimp, lobster, or crabs. Chitosan-Cu (CS-Cu) is a chelate of Cu 2+ with chitosan, and previous studies on the chelation of Cu 2+ with chitosan were focused on its applications in metal ions separation or treatment of waste water (Mcafee et al 2001). Our previous studies showed that Cu-loaded chitosan (containing 2% of Cu, not chitosan-Cu chelate) improved biological functions in rats (Han et al 2010).…”

Section: Doi: 1017221/86/2015-cjasmentioning

confidence: 99%

Correlations of genes expression in PPAR signalling pathway with porcine meat quality traits

Wang¹,

Xue²,

Xu³

et al. 2016

CZECH J ANIM SCI

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Yue X., Hu L., Fu X., Lv M., Han X. (2017): Dietary chitosan-Cu chelate affects growth performance and small intestinal morphology and apoptosis in weaned piglets. Czech J. Anim. Sci., 62, 15-21.The effects of dietary chitosan-copper chelate (CS-Cu) on growth performance, diarrhea, intestinal morphology and epithelial cell apoptosis in weaned piglets was investigated. One hundred and sixty Duroc × Landrace × Yorkshire weanling barrows with an average body weight of 7.75 kg were randomly assigned to one of the following dietary treatments: (1) control, (2) 100 mg Cu/kg diet from CuSO 4 , (3) 100 mg Cu/kg diet from CuSO 4 mixed with chitosan (CuSO 4 +CS), (4) 100 mg Cu/kg diet from CS-Cu. The feeding trial lasted for 30 days. The results showed that the pigs receiving a diet containing CS-Cu had higher average daily gain and lower diarrhea incidence than the pigs receiving dietary CuSO 4 and CuSO 4 +CS. Villus height and the ratio of villus height/ crypt depth in duodenum, jejunum, and ileum were higher and crypt depth was lower in CS-Cu treated pigs than in pigs fed dietary CuSO 4 or CuSO 4 +CS. An apparent decrease of ileal epithelial cell apoptosis in pigs fed CS-Cu diet was found. The activities of antioxidant enzymes were higher in pigs fed dietary CS-Cu than in those fed other diets. The results indicated that dietary CS-Cu showed better biological and physiological function in improving small intestinal morphology and reducing diarrhea incidence.

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Biosorption of Metal Ions Using Chitosan, Chitin, and Biomass of Rhizopus Oryzae

Cited by 130 publications

References 30 publications

Antioxidant Polymers: Metal Chelating Agents

Antioxidant Polymers: Metal Chelating Agents

Treating Leather Tanning Wastewater with Stone Cutting Solid Waste

Correlations of genes expression in PPAR signalling pathway with porcine meat quality traits

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