title: Degradation of azo dye Acid black 1 using low concentration iron of Fenton process facilitated by ultrasonic irradiation.
abstract: A combination of ultrasonic and low concentration iron (<3 mgL(-1)) of Fenton process (US/Fenton) has been used to treat wastewater containing Acid black 1 (AB1). The results show that the oxidation power of low concentration iron of Fenton could be significantly enhanced by ultrasonic irradiation. The degradation of AB1 in aqueous solution by US/Fenton can receive better results compared with either Fenton oxidation or ultrasonic alone. Many operational parameters, such as ultrasonic power density, the pH value, the Fe(2+) dosage, the H(2)O(2) dosage, AB1 concentration and the temperature, affecting the degradation efficiency were investigated. Also, the effects of various inorganic anions (such as Cl(-), NO(3)(-), CO(3)(2-), etc.) on the oxidation efficiency of US/Fenton were studied. Under the given test conditions, 98.83% degradation efficiency was achieved after 30 min reaction by US/Fenton. The effect of various inorganic anions was in the following decreasing order: SO(3)(2-)>CH(3)COO(-)>Cl(-)>CO(3)(2-)>HCO(3)(-)>SO(4)(2-)>NO(3)(-). The results show that the US/Fenton can be an effective technology for the treatment of organic dyes in wastewater.
authors.affiliation: College of Chemistry and Environmental Sciences, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan 453007, PR China. sunsp_hj@yahoo.com.cn
authors.forename: Jian-Hui
authors.initials: JH
authors.lastname: Sun
authors.forename: Sheng-Peng
authors.initials: SP
authors.lastname: Sun
authors.forename: Jing-Yu
authors.initials: JY
authors.lastname: Sun
authors.forename: Rui-Xia
authors.initials: RX
authors.lastname: Sun
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Qiao
authors.forename: Hui-Qin
authors.initials: HQ
authors.lastname: Guo
authors.forename: Mao-Hong
authors.initials: MH
authors.lastname: Fan
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007220:Industrial Waste / Q000517:prevention & control; D007501:Iron / Q000737:chemistry*; D011829:Radiation Dosage; D013010:Sonication; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; C045076:Fenton's reagent; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron