Interactions of starch with salts of metals from the transition groups

Ciesielski, Wojciech; Lii, Cheng-yi; Yen, Ming-Tsung; Tomasik, Piotr

doi:10.1016/s0144-8617(02)00108-x

Cited by 104 publications

(78 citation statements)

References 19 publications

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“…Our former EPR studies [16][17][18][19][20] showed that complexes of starches with all metal acetates, iron(III) chloride and all Ni(II) salts had tetrahedral inner coordination spheres. Cu(II) nitrate and chloride formed complexes of the square planar inner coordination spheres whereas Co(II) salts, except acetate had octahedral inner coordination spheres.…”

Section: Introductionmentioning

confidence: 96%

“…Consequently, also polysaccharides are capable as O-ligate metal ions [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Particular attention has been paid to starch as the ligand of metal ions.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, anions penetrate granular starch suspended in aqueous solutions of salts of metals of the first non-transition group [25]. In contrast to that, cations of the metals from higher non-transition [26] and transition groups [20] bound in granules by coordination as proven by EPR and thermal studies [13][14][15][16][17][18][19][20]. Starch gels more efficiently coordinate to metal ions and amylopectin more efficiently coordinate to metal ions than amylose [17].…”

Section: Introductionmentioning

confidence: 99%

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Starch–metal complexes and their rheology

Ciesielski¹,

Krystyjan²

2009

E-Polymers

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Changes in conductivity of 5 w/w% starch gels was studied on their titration with 0.1 M aqueous solutions of selected metal salts. Starch gels usually trapped around 10 mg metal ions per 1 g starch [Co(II), Cu(II), Fe(III), Ni(II)] and that value was only slightly dependent on starch origin (amaranthus, corn, potato, tapioca, waxy corn). Among salts studied (acetates, chlorides, nitrates) FeCl 3 and NiCl 2 were likely to be used because they hydrolyzed increasing conductivity of the solutions and formed micelles of corresponding hydroxides adhering to starch micelles and increasing amount of trapped metal. Addition of metal salts to starch gels had a devastating effect on pseudoplasticity and viscosity of starch gels and only potato starch gel was to a certain extent, exceptional in that respect.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Starch–metal complexes and their rheology

Ciesielski¹,

Krystyjan²

2009

E-Polymers

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“…Toxic heavy metal ions are mainly produced from mercury, lead, radium, cobalt, arsenic, copper varieties, and so forth still to pay to the ability of these pollutants to cause severe health problems [1][2][3][4][5][6]. Modern separation techniquessuch as anticipation, adsorption, ion exchange, membrane tissue layer processes, and other methods, have been selectively get rid of the metallic ions from dilute wastewaters and professional process channels fields are continually needed [7][8][9][10][11][12]. Particularly, adsorption has been regarded as a powerful an efficient and economical way of removal of heavy metal ions from wastewaters.…”

Section: Introduction:-mentioning

confidence: 99%

Solid-Phase Extraction of Cu2+, Cd2+ and Pb2+from Water Samples Withtetracycline Modified Cellulose Nanoparticles.

Kenawy¹,

El-Reash²,

Abdulraheem.³

2016

IJAR

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In our study, cellulose nanoparticles customized with tetracycline were produced and characterized by several instrumental techniques such as scanning electron microscopy (SEM), elemental analysis and FTIR. The modified cellulose nanoparticles were employed for removing of and from aqueous solution. Effect of several essential parameters including temperature, pH, adsorption instances and adsorbate concentration had been examined to evaluate the optimum adsorption condition. Chemical adsorption as the rate limiting step was confirmed, where the adsorption kinetics followed the second-order kinetic model. Also, the adsorption isotherm experiments showed the best fit with Langmuir model with maximum adsorption capacities of Cu 2+ , Cd 2+ and Pb 2+with cellulose modified with tetracycline. Comparing to the solvent extraction method an analytical applications of the present method to real samples containing were used and the results were good satisfied.Copy Right, IJAR, 2016,. All rights reserved.

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“…Depending on the metal, either sorption complexes or Werner-type complexes can be formed. In both cases no covalent bonds are involved in bonding [10,11]. Apart from sorption and Werner complexes, complexes are known where covalently bound metal atoms are additionally coordinated to numerous sites of ligation, e.g.…”

Section: Introductionmentioning

confidence: 99%

Complexes of 3.6 kDa Maltodextrin with Some Metals

2004

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Preparation of magnesium, lanthanum, and bismuth(III) complexes of 3.6 kDa maltodextrin and some properties of the resulting materials are presented. The metal derivatives contain metals bound to the oxygen atoms of the hydroxyl groups of maltodextrin. Additionally, the metal atoms are coordinated to the hydroxyl groups of the D-glucose units of the macroligand. Such coordination stabilized the metal -oxygen bond against hydrolysis, even in boiling water. The presence of magnesium and lanthanum atoms increased the thermal stability of maltodextrin, whereas bismuth atoms decreased it.

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Interactions of starch with salts of metals from the transition groups

Cited by 104 publications

References 19 publications

Starch–metal complexes and their rheology

Starch–metal complexes and their rheology

Solid-Phase Extraction of Cu2+, Cd2+ and Pb2+from Water Samples Withtetracycline Modified Cellulose Nanoparticles.

Complexes of 3.6 kDa Maltodextrin with Some Metals

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