[Adsorption of cation-nonionic mixed surfactants onto sediment and their effects on adsorption of nitrobenzene from water].
Adsorption behaviors of nitrobenzene, a nonionic surfactant (Triton X-100), a cation surfactant (CPC) and their mixture onto a sediment were investigated. The adsorption of Triton X-100 onto the sediment is enhanced with increasing of co-existed CPC at relatively low concentrations but decreased at relatively high concentrations. The adsorption of CPC onto the sediment decreased a little with increasing of co-existed Triton X-100. In natural waters, cation surfactants and nonionic surfactants will be largely adsorbed by soils or sediments. The adsorption of nitrobenzene onto sediment is linear and enhanced by the co-existed Triton X-100 or CPC, and will be significantly enhanced by the mixture of CPC-Triton X-100. Therefore, cation-nonionic mixed surfactants are potentially used to enhance adsorption of organic contaminants onto soils or sediments and to prepare organobentonite for improving their performance in wastewater treatment.
Department of Environmental Science, Zhejiang University, Hangzhou 310028, China. zlz@zju.edu.cn
Li-zhong
LZ
Zhu
Kun
K
Yang
Shu
S
Dong
D000327:Adsorption; D002412:Cations; D019015:Geologic Sediments / Q000032:analysis; D009578:Nitrobenzenes / Q000032:analysis / Q000737:chemistry*; D013501:Surface-Active Agents / Q000032:analysis / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014876:Water Pollution / Q000517:prevention & control*; D018508:Water Purification / Q000379:methods*
D002412:Cations; D009578:Nitrobenzenes; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; C036077:nitrobenzene