title: [Catalyst effect and the structure-activity characteristics of redox mediators on the reactive brilliant red K-2BP decolorization].
abstract: Four selected quinone redox mediators with similar structure were conducted to accelerate reactive brilliant red K-2BP decolorization, and the accelerating structure-activity of redox mediators on the decolorization was also studied. Batch experiments were carried out to determine the catalyst effect on the decolorization of reactive brilliant red K-2BP with temperature of 35 degrees C and under anaerobic conditions. The experiment results suggested that (1) four similar chemical structure redox mediators [1, 4, 5, 8-Tetrachloroanthraquinone (1,4,5,8-AQ), Anthraquinone (AQ), 1,8-Dichloroanthraquinone (1,8-AQ), 1,5-Dichloroanthraquinone (1,5-AQ)], all accelerated the decolorization rate of reactive brilliant red K-2BP and the reaction rate was enhanced 1.4-3 times; (2) the accelerating order was 1,8-AQ >1 ,5-AQ > AQ >1,4,5,8-AQ at the quinone mediator concentration of 4 mmol x L(-1) and reactive brilliant red K-2BP concentration of 300 mg x L(-1); (3) under the reactive brilliant red K-2BP concentration of 300 mg x L(-1), 1,8-AQ had best accelerating effect, and the relationship between decoloring rate constants and 1,8-AQ concentration; (4) and the mediator acclerating effects also related to substituent positioning effects and conjugated effects. The structure-activity mathematical model of redox mediators was put forward, which could improve water-insoluble redox mediators catalytic strengthening theory system.
authors: School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China. li.g1030@163.com
authors: Li
authors: L
authors: Kang
authors: Jian-Bo
authors: JB
authors: Guo
authors: Jing
authors: J
authors: Lian
authors: Yu-Hua
authors: YH
authors: Wang
authors: Jing-Liang
authors: JL
authors: Yang
authors: Yan-Kai
authors: YK
authors: Guo
authors: Hai-Bo
authors: HB
authors: Li
authors: Yu-Yu
authors: YY
authors: Wang
mesh_terms: D000693:Anaerobiosis; D000880:Anthraquinones / Q000737:chemistry; D001391:Azo Compounds / Q000302:isolation & purification* / Q000378:metabolism; D002384:Catalysis; D003116:Color; D004396:Coloring Agents / Q000737:chemistry / Q000378:metabolism; D007220:Industrial Waste / Q000032:analysis*; D010084:Oxidation-Reduction; D011809:Quinones / Q000737:chemistry*; D013329:Structure-Activity Relationship; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods
chemical_list: D000880:Anthraquinones; D001391:Azo Compounds; D004396:Coloring Agents; D007220:Industrial Waste; D011809:Quinones; C525123:reactive brilliant red K-BP; C503818:1,5-dichloroanthraquinone