title: Removal of fluorescent dissolved organic matter in biologically treated textile effluents by NDMP anion exchange process: efficiency and mechanism.
abstract: The efficiency and mechanism of anion exchange resin Nanda Magnetic Polymer (NDMP) for removal of fluorescent dissolved organic matter in biologically treated textile effluents were studied. The bench-scale experiments showed that as well as activated carbon, anion exchange resin could efficiently remove both aniline-like and humic-like fluorescent components, which can be up to 40 % of dissolved organic matter. The humic-like fluorescent component HS-Em460-Ex3 was more hydrophilic than HS-Em430-Ex2 and contained fewer alkyl chains but more acid groups. As a result, HS-Em460-Ex3 was eliminated more preferentially by NDMP anion exchange. However, compared with adsorption resins, the polarity of fluorescent components had a relatively small effect on the performance of anion exchange resin. The long-term pilot-scale experiments showed that the NDMP anion exchange process could remove approximately 30 % of the chemical oxygen demand and about 90 % of color from the biologically treated textile effluents. Once the issue of waste brine from resin desorption is solved, the NDMP anion exchange process could be a promising alternative for the advanced treatment of textile effluents.
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Collaborative Innovation Center for Advanced Water Pollution Control Technology and Equipment, School of the Environment, Nanjing University, Nanjing, 210023, China.
authors.forename: Wen-Tao
authors.initials: WT
authors.lastname: Li
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Collaborative Innovation Center for Advanced Water Pollution Control Technology and Equipment, School of the Environment, Nanjing University, Nanjing, 210023, China.
authors.forename: Zi-Xiao
authors.initials: ZX
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Collaborative Innovation Center for Advanced Water Pollution Control Technology and Equipment, School of the Environment, Nanjing University, Nanjing, 210023, China.
authors.forename: Chen-Dong
authors.initials: CD
authors.lastname: Shuang
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Collaborative Innovation Center for Advanced Water Pollution Control Technology and Equipment, School of the Environment, Nanjing University, Nanjing, 210023, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Collaborative Innovation Center for Advanced Water Pollution Control Technology and Equipment, School of the Environment, Nanjing University, Nanjing, 210023, China.
authors.forename: Hai-Bo
authors.initials: HB
authors.lastname: Li
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Collaborative Innovation Center for Advanced Water Pollution Control Technology and Equipment, School of the Environment, Nanjing University, Nanjing, 210023, China. liaimin@nju.edu.cn.
authors.forename: Ai-Min
authors.initials: AM
authors.lastname: Li
mesh_terms: D000327:Adsorption; D000837:Anion Exchange Resins; D000838:Anions; D057919:Biological Oxygen Demand Analysis; D005453:Fluorescence; D007221:Industry; D008280:Magnetics; D008863:Microspheres; D011108:Polymers; D013784:Textiles; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000837:Anion Exchange Resins; D000838:Anions; D011108:Polymers; D014874:Water Pollutants, Chemical
keywords: Adsorption; Advanced treatment; Anion exchange; Dye wastewater; Fluorescence excitation-emission matrix; Humic-like substances