title: Treatment of direct blending dye wastewater and recycling of dye sludge.
abstract: A new sorbent material, barium sulfate-Direct Blending Yellow D-3RNL hybrid (BSD), was synthesized and characterized by various methods. Both the anionic dyes, Reactive Brilliant Red X-3B and Weak Acid Green GS were hardly adsorbed by the BSD material, while the sorption of Ethyl Violet (EV) and Victoria Blue B were extremely obvious. The sorption of cationic dyes obeyed the Langmuir isotherm model, which depended on the electric charge attraction. The saturation amount of EV adsorbed onto the BSD material approached to 39.36 mg/g. The sorption of EV changed little with pH from 3 to 12 while it increased with increasing levels of electrolyte. A dye wastewater sampled from Jinjiang Chemicals was treated, and the color removal rate was more than the COD removal rate. In addition, the cationic dye-BSD sludge was utilized as a colorant fill-in coating. The light stability and thermal stability of the colorant was measured and exhibited good features. This work provided a simple and eco-friendly method for dye wastewater treatment with recycling of waste.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. xinfei0105@163.com
authors.forename: Xin-Hui
authors.initials: XH
authors.lastname: Xu
authors.forename: Ming-Li
authors.initials: ML
authors.lastname: Li
authors.forename: Yuan
authors.initials: Y
authors.lastname: Yuan
mesh_terms: D000327:Adsorption; D000880:Anthraquinones / Q000737:chemistry; D001391:Azo Compounds / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry* / Q000302:isolation & purification; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D009282:Naphthalenesulfonates / Q000737:chemistry; D059027:Recycling; D012394:Rosaniline Dyes / Q000737:chemistry / Q000302:isolation & purification; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014865:Waste Disposal, Fluid / Q000379:methods*; D014866:Waste Products; D018508:Water Purification / Q000379:methods
chemical_list: D000880:Anthraquinones; D001391:Azo Compounds; D004396:Coloring Agents; D009282:Naphthalenesulfonates; C520101:Reactive brilliant red X-3B; D012394:Rosaniline Dyes; D014866:Waste Products; C446400:D & C green 5; C034887:ethyl violet; C009662:Victoria blue B