Ligand exchange sorption of arsenate and arsenite anions by chelating resins in ferric ion form: II. Iminodiacetic chelating resin Chelex 100

1988 ◽  
Vol 8 (1) ◽  
pp. 85-95 ◽  
Author(s):  
M. Chanda ◽  
K.F. O'Driscoll ◽  
G.L. Rempel
Keyword(s):  
Ligand Exchange ◽  
Chelating Resin ◽  
Ferric Ion ◽  
Chelating Resins ◽  
Chelex 100

scholarly journals Selective Chelating Resin for Copper Removal and Recovery in Aqueous Acidic Solution Generated from Synthetic Copper-Citrate Complexes from Bioleaching of E-waste

2022 ◽  
Vol 2022 ◽  
pp. 1-14
Author(s):  
Kowit Suwannahong ◽  
Jiyapa Sripirom ◽  
Chadrudee Sirilamduan ◽  
Vanlop Thathong ◽  
Torpong Kreetachart ◽  
...  
Keyword(s):  
Acidic Solution ◽  
Exchange Process ◽  
Ammonium Hydroxide ◽  
Chelating Resin ◽  
Copper Removal ◽  
Basic Solution ◽  
Chelating Resins ◽  
Chelex 100 ◽  
Aqueous Acidic Solution ◽  
Desorption Capacity

This research focused on batch experiment using a new generation of chelating resins via an ion exchange process to describe the metabolic adsorption and desorption capacity onto iminodiacetic acid/Chelex 100, bis-pyridylmethyl amine/Dowex m4195, and aminomethyl phosphonic/Lewatit TP260 functional groups in bioleaching. The results showed that Dowex m4195 had the highest performance of adsorption capacity for copper removal in both H+-form and Na+-form. Results for Lewatit TP260 and Chelex 100 revealed lower adsorption performance than results for Dowex m4195. The investigation of desorption from chelating resins was carried out, and it was found that 2 M ammonium hydroxide concentration provided the best desorption capacity of about 64.86% for the H+-form Dowex m4195 followed by 52.55% with 2 M sulfuric acid. Lewatit with 2 M hydrochloric acid gave the best desorption performance in Na+-form while Chelex 100 using hydrochloric at 1 M and 2 M provided similar results in terms of the H+-form and Na+-form. As aspects of the selective chelating resins for copper (II) ions in aqueous acidic solution generated from synthetic copper-citrate complexes from bioleaching of e-waste were considered, H+-form Dowex m4195 was a good performer in adsorption using ammonium hydroxide for the desorption. However, chelating resins used were subsequently reused for more than five cycles with an acidic and basic solution. It can be concluded from these results that selective chelating resins could be used as an alternative for the treatment of copper (II) ions contained in e-waste or application to other divalent metals in wastewater for sustainable water and adsorbent reuse as circular economy.

scholarly journals The Nature of the Muscle-Relaxing Factor

1963 ◽  
Vol 46 (5) ◽  
pp. 893-904 ◽  
Author(s):  
Franklin Fuchs ◽  
F. Norman Briggs
Keyword(s):  
Molecular Weight ◽  
High Speed ◽  
Gel Filtration ◽  
Active Agent ◽  
Calcium Deficiency ◽  
Chelating Resin ◽  
Prolonged Heating ◽  
Relaxing Factor ◽  
Chelex 100 ◽  
High Molecular Weight Material

High speed centrifugal fractionation of homogenates of rabbit skeletal muscle has led to the discovery of a soluble muscle-relaxing factor in the homogenate. Assay of the relaxing activity with deoxycholate-treated myofibrils and reconstituted actomyosin systems has established that the activity is not produced by the presence of contaminants. Relaxing activity could be removed or destroyed by charcoal, dialysis, prolonged heating, and treatment with the chelating resin, chelex-100, making it improbable that the effect is due simply to calcium deficiency. Many of the characteristics of this muscle-relaxing factor suggest that it is very similar to or the same as the factor formed by the incubation of muscle granule fractions and ATP. Evidence is presented that some soluble protein component is involved in the stabilization of the factor. The relaxing activity could be separated from the high molecular weight material in the supernatant by the technique of gel filtration. On the basis of the gel used, the molecular weight of the active agent should be less than 4000.

Removal of trace As(V) from aqueous solution by Fe(III)-loaded porous amidoximated polyacrylonitrile

2016 ◽  
Vol 16 (6) ◽  
pp. 1603-1613 ◽  
Author(s):  
Chunnuan Ji ◽  
Rongjun Qu ◽  
Qinghua Tang ◽  
Xiguang Liu ◽  
Hou Chen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Ligand Exchange ◽  
Chelating Resin ◽  
Infrared Spectrometry ◽  
Dynamic Adsorption ◽  
Maximum Adsorption Capacity ◽  
Nacl Solution ◽  
Adsorption Selectivity ◽  
Optimal Ph ◽  
Scanning Electron

A Fe(III)-loaded chelating resin named Fe(III) AO PAN was prepared by immobilizing Fe(III) onto porous amidoximated polyacrylonitrile (AO PAN) obtained by modification of hydroxylamine with polyacrylonitrile (PAN), which was synthesized by suspended emulsion polymerization. The structures of PAN, AO PAN, and Fe(III)-AO PAN were characterized by infrared spectrometry and scanning electron microscopy. The performance of Fe(III)-AO PAN as the ligand exchange adsorbent to remove As(V) from aqueous solution was investigated using static equilibrium and dynamic adsorption experiments. The adsorption experiments showed that Fe(III)-AO PAN had higher adsorption selectivity for As(V) than other ubiquitous anions in nature water body such as Cl−, SO42−, HCO3−, PO43−, and SiO32−. The optimal pH for adsorption of As(V) on Fe(III) AO PAN was 2.0, with the maximum adsorption capacity of 0.55 mg/g. The As(V) adsorbed on Fe(III) AO PAN could be easily eluted with 10 BV of 5% NaCl solution (at pH = 9.0).

Hydrolysis and exchange by Chelex 100 chelating resin

1994 ◽  
Vol 23 (2-3) ◽  
pp. 135-140 ◽  
Author(s):  
Jukka Lehto ◽  
Airi Paajanen ◽  
Risto Harjula ◽  
Heikki Leinonen
Keyword(s):  
Chelating Resin ◽  
Chelex 100
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