改性木质素磺酸钙及其对氟离子(F^(-))的吸附研究

Preparation of modified lignosulphonate and its adsorption of F^(-)

利用三亚乙基四胺(TETA)和聚乙二醇(PEG-400)对市售的木质素磺酸钙进行了改性,并研究了改性木质素磺酸钙对溶液中氟离子(F^(-))的吸附行为。结果表明,改性后的木质素对F^(-)表现出了一定的吸附能力。在实际吸附实验中,改性木质素对F^(-)的平衡吸附量约为1.6 mg/g,理论饱和吸附量为2.17 mg/g。通过对改性木质素对F^(-)的吸附动力学分析,其吸附行为符合Langmuir模型和Lagergren准二级动力学。

The lignosulphonate was modified by triethylenetetramine(TETA)and polyethylene glycol(PEG-400),and the adsorption of F^(-)in the solution was studied.The results showed that the equilibrium adsorption capacity of modified lignosulphonate for F^(-)was about 1.6 mg/g and the theoretical saturated adsorption capacity was 2.17 mg/g.The adsorption behavior is in accordance with Langmuir model and Lagergren pseudo second order kinetic equation.