[Enhanced sorption of naphthalene into bentonites in water containing myristylpyridinium bromide and its mechanism].
The influence of myristylpyridinium bromide (MPB) on sorption behavior of naphthalene into two bentonites in aqueous solution and its mechanism were investigated. The apparent sorption coefficients (Kd*) of naphthalene on two bentonites with surfactant was dependent on MPB equilibrium concentration (X). When X was less than 1/10CMC, the Kd* value increased rapidly with increasing MPB primary concentration (X0) that was mainly contributed to increasing the organic carbon contents (foc) of bentonites for partitioning naphthalene. The Kd* value decreased slowly with increasing X0 when X was intermediate 1/10CMC and 1 CMC, because the adding MPB increased foc for sorption naphthalene was less than MPB monomer for enhancement solubility of naphthalene. Then The Kd* value decreased sharply with increasing X0 when X was larger than 1 CMC, which resulted from that the addition of MPB only increased micelle concentration for enhancement solubility of naphthalene. The mechanism was explained by apparent partition coefficient normalized by foc(i. e. Koc*) for the first time. The relationship of 1/Koc* and X was linear. The value of Koc, Kmn and Kmc can be calculated from the intercept and slope of the linear, which will provide theoretical gist for organobentonite applied on organic contaminant remediation.
Chen
Baoliang
B
Department of Environmental Science, Zhejiang University, Hangzhou 310028, China.
Shen
Xueyou
X
Zhu
Lizhong
L
Tao
Shu
S
D000327:Adsorption; D001546:Bentonite / Q000737:chemistry*; D001965:Bromides / Q000737:chemistry*; D009281:Naphthalenes / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D014876:Water Pollution / Q000517:prevention & control
D001965:Bromides; D009281:Naphthalenes; D014874:Water Pollutants, Chemical; D001546:Bentonite; C031721:naphthalene