A novel triolein-embedded activated carbon composite adsorbent was developed. Experiments were car-ried out in areas such as the preparation method, the char-acterization of physicochemical properties, and the adsorp-...A novel triolein-embedded activated carbon composite adsorbent was developed. Experiments were car-ried out in areas such as the preparation method, the char-acterization of physicochemical properties, and the adsorp-tion behavior of the composite adsorbent in removing diel-drin from aqueous solution. Results suggested that the novel composite adsorbent was composed of the supporting acti-vated carbon and the surrounding triolein-embedded cellu-lose acetate membrane. The adsorbent was stable in water, for no triolein leakage was detected after soaking the ad-sorbent for five weeks. The adsorbent had good adsorption capability to dieldrin, which was indicated by a residual di-eldrin concentration of 0.204 μg·L?1. The removal efficiency of the composite adsorbent was higher than the traditional activated carbon adsorbent.展开更多
A novel triolein-embedded adsorbent for re-moval of persistent organic pollutants (POPs) from water was developed. In this paper, taking dieldrin and endrin as the target pollutants, different factors (temperature, io...A novel triolein-embedded adsorbent for re-moval of persistent organic pollutants (POPs) from water was developed. In this paper, taking dieldrin and endrin as the target pollutants, different factors (temperature, ion strength, pH, and concentration of humic acid) that affect the adsorption rate were investigated. Adsorption isotherms of these two pollutants fitted to Freundlich model well identi-fied the partition mechanism between the adsorbent and water. However, the equilibrium constant of dieldrin was larger than that of endrin due to larger octanol-water coeffi-cient of dieldrin. Adsorption rate of dieldrin increased with the increase of temperature, the decrease of ion strength, pH and concentration of humic acid, whereas adsorption rate of endrin decreased with the increase of temperature and pH. Humic acid firstly increased, and then decreased the adsorp-tion rate of endrin. Ion strength hardly affected the adsorp-tion rate of endrin.展开更多
基金This work was supported by the National Natural Science Foundation of China(Grant Nos.50578154,20337020)the Hi-Tech Research and Development Program of China(Grant No.2005AA642020).
文摘A novel triolein-embedded activated carbon composite adsorbent was developed. Experiments were car-ried out in areas such as the preparation method, the char-acterization of physicochemical properties, and the adsorp-tion behavior of the composite adsorbent in removing diel-drin from aqueous solution. Results suggested that the novel composite adsorbent was composed of the supporting acti-vated carbon and the surrounding triolein-embedded cellu-lose acetate membrane. The adsorbent was stable in water, for no triolein leakage was detected after soaking the ad-sorbent for five weeks. The adsorbent had good adsorption capability to dieldrin, which was indicated by a residual di-eldrin concentration of 0.204 μg·L?1. The removal efficiency of the composite adsorbent was higher than the traditional activated carbon adsorbent.
基金This work was supported by the National Natural Science Foundation of China(Grant No.20337020)the National High-Tech Research and Development Plan(Grant No.2005AA642020)the China Postdoctoral Science Foundation.
文摘A novel triolein-embedded adsorbent for re-moval of persistent organic pollutants (POPs) from water was developed. In this paper, taking dieldrin and endrin as the target pollutants, different factors (temperature, ion strength, pH, and concentration of humic acid) that affect the adsorption rate were investigated. Adsorption isotherms of these two pollutants fitted to Freundlich model well identi-fied the partition mechanism between the adsorbent and water. However, the equilibrium constant of dieldrin was larger than that of endrin due to larger octanol-water coeffi-cient of dieldrin. Adsorption rate of dieldrin increased with the increase of temperature, the decrease of ion strength, pH and concentration of humic acid, whereas adsorption rate of endrin decreased with the increase of temperature and pH. Humic acid firstly increased, and then decreased the adsorp-tion rate of endrin. Ion strength hardly affected the adsorp-tion rate of endrin.
