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

Abstract

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.

Characterization and Optimization of Polymeric Bispicolamine Chelating Resin: Performance Evaluation via RSM Using Copper in Acid Liquors as a Model Substrate through Ion Exchange Method

“…The peaks at 1715 and 1608 cm −1 , which appeared in the spectra after the ion exchange process (Cu(II)-loaded H + chelating resin Dowex-M4195), had been transformed into new broad absorption peaks. It indicated that those peaks may be attributed to the interactions/occurrence/combination [ 38 , 39 ] between nitrogen (protonated) and Cu(II) (divalent metal) [ 10 ]. In addition, the stretching vibration of the alkane groups (CH 3 , CH 2 and CH, 2 or 3 bands) was exhibited at around 2923 cm −1 and other fundamental peaks before and after the ion exchange process were almost the same.…”

“…These chelating resins were applied for extraction of various metals such as Pb(II)/lead, Cu(II)/copper, Cd(II)/cadmium, Zn(II)/zinc, La(III)/lanthanum, Ni(II)/nickel, Cr(III, IV)/chromium, Fe(II)/iron and Co(II)/cobalt ions [ 8 , 9 ] from aqueous solutions and especially in electronics waste applications at a low pH. As mentioned above, the literature reported that Dowex-M4195 chelating resin showed the best results in removing/ion exchange Cu(II) at a low pH of less than 2 [ 10 ] as compared to other functional groups of chelating resin. However, the selective chelating resins in terms of ionic form such as Na + and H + are still limited regarding information in the literature for removing of Cu(II) in the electronics industries.…”

Natural and Synthetic Polymers Modified with Acid Blue 113 for Removal of Cr3+, Zn2+ and Mn2+

“…Nowadays, the lack of selectivity of polymeric adsorbents has led to the development of new chelate polymers. In order to obtain a huge selectivity for metal ions (M X+ ) removal new chelate materials have been developed [ 1 , 2 ]. In this, natural and synthetic polymers have proven to be able in preconcentrating and separating M X+ [ 3 , 4 ].…”

New Chelate Resins Prepared with Direct Red 23 for Cd2+, Ni2+, Cu2+ and Pb2+ Removal

“…Nowadays, the feasibility of different chemically modified polymers, namely chelating polymers, was tested in the field of wastewater treatment in search of more effective means of depollution. Furthermore, to improve their adsorption capacity, chemical modifications can be performed with chelating ligands that have the following functional groups in their structure: -COO -, -N=N-, -CO -, -SO 3 -, -NH 2 , -OH and -SH [9][10][11]. Thus, the recyclable aims including regeneration and reuse of chelating polymers are important attributes of green technologies.…”