Application of the anion-exchange resin as a complementary technique to remove residual cyanide complexes in industrial
- PDF / 1,420,940 Bytes
- 14 Pages / 595.276 x 790.866 pts Page_size
- 85 Downloads / 175 Views
RESEARCH ARTICLE
Application of the anion-exchange resin as a complementary technique to remove residual cyanide complexes in industrial plating wastewater after conventional treatment Jae-Hun Chu 1 & Jin-Kyu Kang 2 & Seong-Jik Park 3 & Chang-Gu Lee 1 Received: 20 January 2020 / Accepted: 16 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Cyanide is highly toxic and must be destroyed or removed before discharge into the environment. This study examined the ability of commercial anion-exchange resins to remove residual cyanide complexes from industrial plating wastewater as a complement to conventional treatment. Cyanide removal experiments were conducted with various initial concentrations, reaction times, and temperatures, and the presence of co-existing anions. The maximum cyanide removal capacity (Qm) of the Bonlite BAMB140 resin is 31.82 mg/g and effectively removes cyanide from aqueous solution within 30 min. The cyanide removal by the resin is an endothermic process and is affected by the presence of anions in industrial plating wastewater. The relative competitiveness observed in this study was sulfate > nitrate > chloride. A mixture of 0.05 M NaCl and NaOH regenerates resin for continuous reuse for 5 cycles. The Bonlite BAMB140 resin was able to remove residual cyanide complexes from industrial plating wastewater, but the removal capacity of the resin was reduced by more than three times in batch (9.94 mg/g) and column (6349.12 mg/L) systems. Based on the results, the anion-exchange resins are expected to be used as a complementary technique to remove residual cyanide complexes in industrial plating wastewater after conventional treatment. Keywords Anion-exchange resin . Cyanide removal . Residual cyanide complex . Industrial plating wastewater . Complementary technique
Introduction Cyanide is a carbon–nitrogen radical found in various organic and inorganic compounds; some forms of which are very powerful and fast-acting toxins (Dash et al. 2009b). Cyanide can be introduced into surface water naturally (e.g., by biological processes of plants and microorganisms) or as a result of human activities, such as synthetic fiber production, oil extraction, fertilizer production, pharmaceutical manufacturing, and coal
Responsible editor: Angeles Blanco * Chang-Gu Lee [email protected] 1
Department of Environmental and Safety Engineering, Ajou University, Suwon 16499, Republic of Korea
2
Environmental Functional Materials and Water Treatment Laboratory, Seoul National University, Seoul, Republic of Korea
3
Department of Bioresources and Rural System Engineering, Hankyong National University, Anseong, Republic of Korea
gasification (Noroozi et al. 2018; Simsek et al. 2015). In addition, cyanide is used extensively in the electroplating and mining industries due to its strong affinity for metal cations and has become a major source of contamination in natural waters (Dash et al. 2009a). The industrial effluents generally contain total cyanide levels of 0.01 to 10 mg/L, while t
Data Loading...
