title: Investigation on the reaction of phenolic pollutions to mono-rhamnolipid micelles using MEUF.
abstract: Micellar-enhanced ultrafiltration (MEUF) processes of resorcinol, phenol, and 1-Naphthol with rhamnolipid as an anionic biosurfactant were investigated using polysulfone membrane. The effects of retentate/permeate concentration of phenolic pollutants (CR/CP), distribution coefficient of phenolic pollutions (D), concentration ratios of phenolic pollutions (αP) and rhamnolipids (αR) and adsorption capacity of the membrane (Nm) were studied by operating pressure, pH condition, feed surfactant, and phenolic pollution concentrations. Results showed that CR(with pH) increased and ranked in the following order: resorcinol > phenol > 1-Naphthol, which is same with CR(with pressure), CR(with surfactant), CR/CP(with pollution), α,Pand D, while CP(with pH), CP(with pressure), and CP(with surfactant) ranked in the reverse order. The operating pressure increased the solubility of phenolic from 0 to 0.1 MPa and then decreased slowly above 0.1 MPa. The concentration ratio of rhamnolipid was nearly at 2.0 and that of phenolic pollution was slightly above 1.0. D of phenolic pollutants reached the maximum at phenolic pollution concentration of 0.1 mM and the feed rhamnolipid concentration at 1 CMC. Moreover, zeta potential in feed stream and retentate stream and membrane adsorption of phenolic pollutions were firstly investigated in this article; the magnitudes of zeta potential with the feed stream of three phenolic pollutions were nearly the same and slightly lower than those with the retentate stream. The adsorption capacity of the membrane (Nm) was calculated and compared to the former research, which showed that rhamnolipid significantly decreases the membrane adsorption of phenolic pollutions at a relatively lower concentration. It was implied that rhamnolipid can be substituted for chemical surfactants.
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China. lzf18182002@163.com.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China. lzf18182002@163.com.
authors: Zhifeng
authors: Z
authors: Liu
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.
authors: Mingda
authors: M
authors: Yu
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China. zgming@hnu.edu.cn.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China. zgming@hnu.edu.cn.
authors: Guangming
authors: G
authors: Zeng
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.
authors: Min
authors: M
authors: Li
authors: College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China.
authors: Jiachao
authors: J
authors: Zhang
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.
authors: Hua
authors: H
authors: Zhong
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.
authors: Yang
authors: Y
authors: Liu
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.
authors: Binbin
authors: B
authors: Shao
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.|College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China.
authors: Zhigang
authors: Z
authors: Li
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.
authors: Zhiquan
authors: Z
authors: Wang
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.
authors: Guansheng
authors: G
authors: Liu
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.|Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.
authors: Xin
authors: X
authors: Yang
mesh_terms: D000327:Adsorption; D003651:Decanoates / Q000737:chemistry*; D006017:Glycolipids / Q000737:chemistry; D008823:Micelles; D009284:Naphthols / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D012118:Resorcinols / Q000737:chemistry; D012210:Rhamnose / Q000031:analogs & derivatives* / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry; D014462:Ultrafiltration / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D003651:Decanoates; D006017:Glycolipids; D008823:Micelles; D009284:Naphthols; D010636:Phenols; D012118:Resorcinols; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; C418382:rhamnolipid; C029350:1-naphthol; C085734:rhamnopyranosyl-3-hydroxydecanoyl-3-hydroxydecanoate; D012210:Rhamnose; C031389:resorcinol
keywords: Hydrophobicity; Membrane adsorption; Micellar-enhanced ultrafiltration; Mono-rhamnolipid; Phenolic pollutions