Advanced treatment of wet-spun acrylic fiber manufacturing wastewater using three-dimensional electrochemical oxidation was written by Zheng, Tianlong;Wang, Qunhui;Shi, Zhining;Fang, Yue;Shi, Shanshan;Wang, Juan;Wu, Chuanfu. And the article was included in Journal of Environmental Sciences (Beijing, China) in 2016.COA of Formula: C9H16O4 The following contents are mentioned in the article:
A three-dimensional electrochem. oxidation (3D-EC) reactor with introduction of activated carbon (AC) as particle micro-electrodes was applied for the advanced treatment of secondary wastewater effluent of a wet-spun acrylic fiber manufacturing plant. Under the optimized conditions (c.d. of 500 A/m2, circulation rate of 5 mL/min, AC dosage of 50 g, and chloride concentration of 1.0 g/L), the average removal efficiencies of COD (CODcry), NH3-N, total organic carbon (TOC), and UV absorption at 254 nm (UV254) of the 3D-EC reactor were 64.5%, 60.8%, 46.4%, and 64.8%, resp.; while the corresponding effluent concentrations of CODcry, NH3-N, TOC, and UV254 were 76.6, 20.1, and 42.5 mg/L, and 0.08 Abs/cm, resp. The effluent concentration of CODcry was less than 100 mg/L, which showed that the treated wastewater satisfied the demand of the integrated wastewater discharge standard (GB 8978-1996). The 3D-EC process remarkably improved the treatment efficiencies with synergistic effects for CODcry, NH3-N, TOC, and UV254 during the stable stage of 44.5%, 38.8%, 27.2%, and 10.9%, resp., as compared with the sum of the efficiencies of a two-dimensional electrochem. oxidation (2D-EC) reactor and an AC adsorption process, which was ascribed to the numerous micro-electrodes of AC in the 3D-EC reactor. Gas chromatog. mass spectrometry (GC-MS) anal. revealed that electrochem. treatment did not generate more toxic organics, and it was proved that the increase in acute biotoxicity was caused primarily by the production of free chlorine. This study involved multiple reactions and reactants, such as Ethyl methyl adipate (cas: 18891-13-9COA of Formula: C9H16O4).
Ethyl methyl adipate (cas: 18891-13-9) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. COA of Formula: C9H16O4
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics