Copper Removal from Electroplating Wastewater by Coprecipitation of Copper-Based Supramolecular Materials: Preparation and Application Study

Abstract

This paper describes an experimental study for the removal of copper ions from electroplating wastewater. Different metal ions are added to the wastewater to remove copper ions by coprecipitation and the copper-based supramolecular materials with layered structures are obtained. It is found that the best results are obtained with the addition of -Mg 2+ -Al 3+ mixture with ratio of 3 : 1, pH ≈ 10, and aging for 1 d at 60 ∘ C. With these conditions, the residual copper in the electroplating wastewater satisfies national emission standards and wastewater handling capacity of up to 30 mL can be achieved. The properties of the copper-based supramolecular materials prepared under these optimal conditions are characterized. The results show that the materials have a layered structure and good thermal and structural stability and achieve a saturated adsorption of iodide ions of 41.23 mg/g.

Adsorption of Copper (II) from Aqueous Solutions with Alginate/Clay Hybrid Materials

“…All spectra exhibited a main band located at 1035 cm −1 , attributed to the Si–O stretching of montmorillonite. The band located about 915 cm −1 was ascribed to the presence of Al 2 OH species that are characteristic of dioctahedral smectites [ 36 ], while the band located at 790 cm −1 was attributed to the Si 2 OH bending mode. The band located at 840 cm −1 was assigned to the AlMgOH bending mode.…”

“…Copper concentrations that exceed 1 ppb can be toxic for human and aquatic organisms and ecosystems [ 35 ]. The copper concentration in electroless plating wastewater must not exceed 0.5 ppb [ 36 ]. According to the EPA, the maximum level of copper ions in drinking water should not exceed 1.3 mg L −1 [ 37 ].…”

Heavy Metals Removal from Electroplating Wastewater by Waste Fiber-Based Poly(amidoxime) Ligand

“…The electroplating technique comprises several activities like acid pickling, alkaline cleaning, plating, and rinsing resulting huge amount of heavy metals, cyanides, nitrates and sulphate complexes in the wastewater [7][8][9]. The concentration of some metal ions is high in the electroplating wastewater [10][11][12][13]. Exposure of high level of heavy metals may cause diverse health effect such as disruption of the endocrine system, respiratory organs, and kidney and liver damage, as well as lung cancer [14].…”

Selected Heavy Metals Removal From Electroplating Wastewater by Purified and Polyhydroxylbutyrate Functionalized Carbon Nanotubes Adsorbents

“…Moreover, since 1947, purification of industrial electroplating wastewater has been seen as a major challenge 10 due to its chemical composition, its effects on the environment without proper and legal policies guiding its release into the environment. Industrial electroplating wastewater has very high concentration of heavy metals such as iron, zinc, nickel, cadmium, chromium, lead, copper, arsenic amongst others 11 – 13 . The severity of electroplating wastewater pollution has led to discharge of heavy metals which are toxic, recalcitrant and non-biodegradable in the environment and exposure to human, terrestrial and aquatic organisms at high concentration can cause disruption of the endocrine system, respiratory organs, and low intelligent quotient to mention but a few.…”