Studies on the sorption behaviors of nitrobenzene on marine sediments.
The sorption behaviors of nitrobenzene on marine sediments were systematically investigated in this study. The nitrobenzene sorption on both HCl-treated and untreated sediments accorded well with the linear sorption isotherm. It occurred primarily through partition function of organic carbon of sediments. In comparison, the sorption behavior of nitrobenzene on H2O2-treated sediments was nonlinear and conformed to Langmuir isotherm. Sorption of nitrobenzene on H2O2-treated sediment was mainly through surface function of sediment minerals such as clays. With the increase of ionic strength (salinity), solubility of nitrobenzene in solution would decrease. At the same time, the release of dissolvable part of organic carbon into water solution would also decrease. As a result, partition coefficient and saturate adsorption amount of nitrobenzene on marine sediments increased with increasing salinity of seawater. Contrary to the influence of salinity, partition coefficient and saturate adsorption amount of nitrobenzene decreased with increasing temperature.
Zhao
Xue-Kun
XK
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, PR China.
Yang
Gui-Peng
GP
Gao
Xian-Chi
XC
D000327:Adsorption; D019015:Geologic Sediments / Q000032:analysis*; D006851:Hydrochloric Acid / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D007700:Kinetics; D009578:Nitrobenzenes / Q000032:analysis / Q000737:chemistry*; D009994:Osmolar Concentration; D012623:Seawater; D012965:Sodium Chloride / Q000737:chemistry; D012995:Solubility; D013696:Temperature
D009578:Nitrobenzenes; D012965:Sodium Chloride; D006861:Hydrogen Peroxide; C036077:nitrobenzene; D006851:Hydrochloric Acid