title: Evaluating the primary and ready biodegradability of dianilinodithiophosphoric acid.
abstract: Dianilinodithiophosphoric acid (DDA) is widely used as sulfide mineral flotation collector in China. It is necessary to investigate the biodegradability of DDA to provide the fundamental knowledge to assess the environmental fate in the risk assessment of DDA and to design and operate the DDA flotation wastewater biological treatment plant. In the present study, the primary and ready aerobic biodegradations of DDA were studied and the primary biodegradation kinetic model of DDA was developed. The results show that DDA displays a good primary biodegradability and its biodegradation ratio reaches 99.8 % in 7 days. In contrast, DDA is not easily ready biodegradable; hence, it is a partially biodegradable organic compound. The primary aerobic biodegradation kinetics can be described using the first-order reaction kinetics equation: C = 19.72191e(-0.01513t).
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.|Guangdong Vocational College of Environmental Protection Engineering, Foshan, 528216, China.
authors.forename: Weixiong
authors.initials: W
authors.lastname: Lin
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China. sysun@gdut.edu.cn.|Guangdong Vocational College of Environmental Protection Engineering, Foshan, 528216, China. sysun@gdut.edu.cn.
authors.forename: Shuiyu
authors.identifier: http://orcid.org/0000-0002-8148-5163
authors.initials: S
authors.lastname: Sun
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
authors.forename: Pingting
authors.initials: P
authors.lastname: Xu
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
authors.forename: Yongkang
authors.initials: Y
authors.lastname: Dai
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Ren
mesh_terms: D001673:Biodegradation, Environmental; D002681:China; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D010755:Organophosphates / Q000032:analysis / Q000737:chemistry*; D018570:Risk Assessment
chemical_list: D004785:Environmental Pollutants; D010755:Organophosphates
keywords: Aerobic biodegradation; Dianilinodithiophosphoric acid; Kinetics; Primary biodegradability; Ultimate biodegradability