【摘要】 研究了δ-MnO₂对水体中Tl（Ⅰ）的吸附去除效能,并探讨了水环境条件对δ-MnO₂吸附Tl（Ⅰ）的影响规律。结果表明,δ-MnO₂对Tl（Ⅰ）的吸附效果良好,在5 min内即可达到吸附平衡,吸附容量高达581 mg/g,且吸附等温曲线符合Langmuir模型;δ-MnO₂对Tl（Ⅰ）的吸附过程符合三层表面络合模型。提高水体的pH值有利于δ-MnO₂对Tl（Ⅰ）的吸附去除;水体中竞争性阳离子的存在不利于δ-MnO₂对Tl（Ⅰ）的吸附去除,且二价阳离子的影响大于一价阳离子;天然有机物富里酸和腐殖酸对δ-MnO₂吸附Tl（Ⅰ）有轻微抑制作用。更多还原

【Abstract】 The adsorption efficiency of Tl （Ⅰ） on δ-MnO₂ was investigated,and the influence of water environmental conditions on adsorption was explored. The results showed that δ-MnO₂ had good adsorption effect on Tl （Ⅰ）. The adsorption equilibrium was reached within 5 minutes,and the adsorption capacity was up to 581 mg/g which conformed to the Langmuir model. In addition,the adsorption process complied with the three-layer surface complexation models. Increasing p H of the solution was conducive to the adsorption of Tl （Ⅰ） on δ-MnO₂. However,the existence of competitive cation was adverse to adsorption effect,and the influence of bivalent cation was greater than that of univalent cation. In addition,natural organic matter like fulvic acid and humic acid had a slight inhibitory effect on the adsorption of Tl （Ⅰ） on δ-MnO₂ surface.更多还原