[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.
Zhu
Li-zhong
LZ
Department of Environmental Science, Zhejiang University, Hangzhou 310028, China. zlz@zju.edu.cn
Yang
Kun
K
Dong
Shu
S
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