郭得松, 储祺, 佀青青, 李锋民. 死亡藻细胞对水中邻苯二甲酸二丁酯(DBP)的吸附研究[J]. 海洋环境科学, 2021, 40(2): 167-175. DOI: 10.12111/j.mes.20200016
引用本文: 郭得松, 储祺, 佀青青, 李锋民. 死亡藻细胞对水中邻苯二甲酸二丁酯(DBP)的吸附研究[J]. 海洋环境科学, 2021, 40(2): 167-175. DOI: 10.12111/j.mes.20200016
GUO De-song, CHU Qi, SI Qing-qing, LI Feng-min. Adsorption of dibutyl phthalate (DBP) in water on dead algal cells[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2021, 40(2): 167-175. DOI: 10.12111/j.mes.20200016
Citation: GUO De-song, CHU Qi, SI Qing-qing, LI Feng-min. Adsorption of dibutyl phthalate (DBP) in water on dead algal cells[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2021, 40(2): 167-175. DOI: 10.12111/j.mes.20200016

死亡藻细胞对水中邻苯二甲酸二丁酯(DBP)的吸附研究

Adsorption of dibutyl phthalate (DBP) in water on dead algal cells

  • 摘要: 本文选用死亡的短裸甲藻(Gymnodinium breve cells)和中肋骨条藻(Skeletonema costatum)细胞作为吸附剂,分析了其理化性质,拟合了对邻苯二甲酸二丁酯(dibutyl phthalate,DBP)的吸附动力学和吸附等温线,探究了pH和离子强度对吸附效果的影响。结果表明:两种死亡藻细胞对DBP的吸附符合伪二级动力学模型,吸附过程以化学吸附为主,吸附等温线符合Freundlich模型,吸附过程为多层吸附主导的混合吸附;pH 从2.0至3.5时,两种死亡藻细胞的吸附量随pH的升高而降低,而pH从3.5至9.5时,吸附量随pH的增加而增大;NaCl浓度从0至0.05 mol/L时,两种死亡藻细胞对DBP的吸附量迅速增大,从0.05 mol/L升至0.50 mol/L过程中其吸附量基本没有变化。本研究证明了死亡藻细胞可以吸附水中的DBP,而且发现无细胞壁的短裸甲藻的吸附能力显著优于中肋骨条藻,研究结果对于死亡藻细胞应用于水环境中PAEs的去除具有重要意义。

     

    Abstract: In this study, dead Gymnodinium breve cells and dead Skeletonema costatum cells were used as two adsorbents, which had been characterized of their physical and chemical properties. The adsorption kinetics and adsorption isotherm of dibutyl phthalate (DBP) in two adsorbents were fitted, also, the effect of pH and ionic strength on adsorption were considered. The results showed that the adsorption of DBP by two adsorbents followed pseudo second-order kinetics, and the adsorption process is dominated by chemical adsorption. Further analysis showed that the adsorption isotherms of two adsorbents for DBP correspond to Freundlich model, and the adsorption process is a mixed adsorption dominated by multilayer adsorption. When the pH value was lower than 3.5, the adsorption capacity of two adsorbents decreased with the increase of pH, and then showed an increasing trend as the pH was increased from 3.5 to 9.5. When the concentration of NaCl increased from 0 to 0.05 mol/L, the adsorption capacity of DBP by two adsorbents increased rapidly, and with the increase of NaCl concentration from 0.05 mol/L to 0.50 mol/L, no significant changes in adsorption ability were observed. This research proved that dead algae cells can adsorb DBP in water, and the dead Gymnodinium breve cells without cell walls obtained higher adsorption ability than dead Skeletonema costatum cells. The research results have great significance for the application of dead algae cells to remove PAEs in water.

     

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