title: Production of bioflocculants prepared from formaldehyde wastewater for the potential removal of arsenic.
abstract: A novel bioflocculant (MBF-79) prepared using formaldehyde wastewater as carbon resource was investigated in the study. The optimal conditions for bioflocculant production were determined to be an inoculum size of 7.0%, initial pH of 6.0, and formaldehyde concentration of 350 mg/L. An MBF-79 of 8.97 g/L was achieved as the maximum yield. Three main elements, namely C, H, and O, were present in MBF-79 with relative weigh percentages of 39.17%, 6.74%, and 34.55%, respectively. The Gel permeation chromatography analysis indicated that the approximate molecular weight (MW) of MBF-79 was 230 kDa. MBF-79 primarily comprised polysaccharide (71.2%) and protein (27.9%). Additionally, conditions for the removal of arsenic by MBF-79 were found to be MBF-79 at 120 mg/L, an initial pH 7.0, and a contact time 60 min. Under the optimal conditions, the removal efficiencies of arsenate (0.5 mg/L) and arsenite (0.5 mg/L) were 98.9% and 84.6%, respectively. Overall, these findings indicate bioflocculation offers an effective alternative method of decreasing arsenic during water treatment.
authors.affiliation: School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China; School of Mathematics and Economics, Hubei University of Education, Wuhan 430205, China.
authors.forename: Haijuan
authors.initials: H
authors.lastname: Zhao
authors.affiliation: Hubei Key Laboratory of Purification and Application of Plant Anti-cancer Active Ingredients, Chemistry and Biology Science College, Hubei University of Education, Wuhan 430205, China.
authors.forename: Chunying
authors.initials: C
authors.lastname: Zhong
authors.affiliation: School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China.
authors.forename: Honggao
authors.initials: H
authors.lastname: Chen
authors.affiliation: School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Yao
authors.affiliation: School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China.
authors.forename: Liqing
authors.initials: L
authors.lastname: Tan
authors.affiliation: Department of Political Science, Texas A&M University, College Station, 77843, USA.
authors.forename: Youlang
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China. Electronic address: wallice24@hotmail.com.
authors.forename: Jiangang
authors.initials: J
authors.lastname: Zhou
mesh_terms: D001149:Arsenates / Q000302:isolation & purification; D001151:Arsenic / Q000737:chemistry / Q000302:isolation & purification*; D018053:Arsenites / Q000302:isolation & purification; D002244:Carbon / Q000378:metabolism; D005427:Flocculation; D005557:Formaldehyde / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D012722:Sewage / Q000382:microbiology; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D001149:Arsenates; D001151:Arsenic; D018053:Arsenites; D002244:Carbon; D005557:Formaldehyde; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical; C015001:arsenite; C025657:arsenic acid
keywords: Arsenic; Bioflocculant; Formaldehyde; Paenibacillus polymyxa; Water treatment