Enhanced precipitation of cyanide from electroplating wastewater via self-assembly of bimetal cyanide complex

Effective Removal of Cyanide and Heavy Metals from an Industrial Electroplating Stream Using Calcium Alginate Hydrogels

“…In addition, the contents of Ni (4899 mg/L) and Cu (1904 mg/L) obtained were significantly higher than those found in other industrial plating wastewaters, where the values of Ni and Cu were, respectively, always lower than 271 and 36.16 mg/L [11,35]. Whereas Zn values (58.5 mg/L) found in this raw wastewater were relatively similar [11] or even lower than those found in this kind of industrial effluents [35]. Other heavy metals like Pb, Cr total and Cr (VI) were not detected by means of the analytical methodology employed.…”

“…Other industrial effluents from coke plants (25.7 mg/g) or chemical industry (10.4-50.9 mg/g) also have more reduced contents of CN Total [13]. In addition, the contents of Ni (4899 mg/L) and Cu (1904 mg/L) obtained were significantly higher than those found in other industrial plating wastewaters, where the values of Ni and Cu were, respectively, always lower than 271 and 36.16 mg/L [11,35]. Whereas Zn values (58.5 mg/L) found in this raw wastewater were relatively similar [11] or even lower than those found in this kind of industrial effluents [35].…”

“…Diverse technologies have been employed for cyanide removal including alkaline chlorination [8], hydrogen peroxide oxidation [9], precipitation [10,11], adsorption [12], biological degradation [13], reverse osmosis [14], and electrodialyisis [15]. A great part of these methods can be affected by important disadvantages like elevated cost with special equipment and maintenance, low removal efficiency, sensitive operation conditions, and generation of large amounts of wastes.…”

Design of “turn-off” luminescent Ln-MOFs for sensitive detection of cyanide anions

“…However, despite its high toxicity, it is widely used in a variety of industrial processes, including dyeing, electroplating, textile production, metallurgy and pharmaceutical, plastic and resin manufacturing. [5][6][7][8] Industrial waste contaminated with cyanide possibly tends to pollute food and water resources, posing a significant threat and incurring serious health problems for humans. Once cyanide enters humans and decomposes itself to toxic CN − , accumulated cyanide ions combine with ferric iron in the cell mitochondria and inhibit the reduction of iron ions and interrupt the electron transfer process, which makes cell tissues unable to utilize oxygen present in the blood.…”

Friction and wear behavior of electro-deposition Ni-cBN composite coatings

“…However, the low wear performances has restricted its further practical application in certain field, such as aerospace. To our best knowledge, surface treatment method is widely used to improve the wear resistance of the Ti alloys, such as physical vapor deposition (PVD) [5], chemical vapor deposition (CVD) [6], electroless plating [7] and electroplating [8]. Compared to other medhods, Electro-deposition is one of the most important techniques for producing composites of metallic and non-metallic constituents, because of its simple process and fast deposition rate.…”