Preliminary Study of Zinc Removal from Cyanide-free Alkaline Electroplating Effluent by Precipitation using Oxalis Plants

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

“…Generally, two methods have been utilized for toxic metals elimination from alkaline electroplating wastewater [30][31][32][33][34][35][36][37]. One of them is the dissociation of organic complex by the process of Fenton or wet oxidation [31][32][33].…”

“…Another report suggested that gluconic acid complex can be decomposed by micro-electrolysis system which take place precipitation of Cu and removal more than 90% [33]. Another removal method has been utilized by addition of specific chemical compounds and/or chemically modified resins [34][35][36][37]. Thus, about 99.6% of Cu-complex using EDTA was catch by sodium diethyldithiocarbamate and precipitation occurred by the coagulation with polyferric sulfate and polyacrylamide [34].…”

Upcycling of Electroplating Sludge to Prepare Erdite-Bearing Nanorods for the Adsorption of Heavy Metals from Electroplating Wastewater Effluent

“…The removal of heavy metals from alkaline electroplating wastewater generally involves two methods [14][15][16][17][18][19][20][21]. One is the decomposition of organic complex reagents by the Fenton reaction and/or wet oxidation [15][16][17].…”

“…Similarly, the derivatives of gluconic acid in the molasses-based distillery wastewater were effectively broken down by wet oxidation at a temperature above 150 • C [16]. Another method is the removal of heavy metals by adding special agents and/or functionalized resin [18][19][20][21]. For example, Li et al [18] found that at a sodium diethyldithiocarbamate/Cu molar ratio of 1, approximately 99.6% of complex Cu (with EDTA as the coordination agent) is trapped by sodium diethyldithiocarbamate and precipitates during coagulation after the addition of polyferric sulfate and polyacrylamide.…”

“…A few aminopolycarboxylic acids, such as iminodiacetic acid, nitrilotriacetic acid, and diethylenetriaminepentaacetic acid, include the necessary functionalized groups (e.g., carboxyl and amino) to chelate heavy metals [19]. Such organics were also grifted on the resin surface to considerably improve its affinity for heavy metals recycling from electroplating wastewater [20,21]. Although these methods can efficiently remove heavy metals from alkaline wastewater, they require expensive agents and complicated devices.…”