Multi-wall carbon nanotubes functionalized with 3-Amino-5a, 10a-dihydroxybenzo [b] indeno [2,ld]furan-10-one (ADIF), (MWCNT-ADIF), were used as the adsorbent to remove lead ions (Pb²⁺) from aqueous solutions. The samples were characterized by FT-IR, SEM, TGA and DTG. Effects of pH, initial Pb²⁺ concentration, adsorbent dosage and contact time on adsorption kinetics and equilibrium were investigated in a batch mode. Adsorption isotherms of Pb²⁺ ions were investigated using four two-parameter models (Langmuir, Freundlich, Tempkin, Dubinin-Radushkevich) and six three-parameter models (Redlich-Peterson, Khan, Sips, Radke-Prausnitz, Toth, Hill). Adsorption kinetics were investigated by the pseudo first-order kinetic model, the pseudo second-order kinetic model and the intra particle diffusion model. Three error analysis methods, correlation coefficient, chi-square test and average relative errors, were used to determine the best fitted isother. Results indicated that adsorption kinetics was best described by the pseudo second-order kinetic model. Error analysis indicated that three-parameter models described the Pb²⁺ sorption data better than the two-parameter models . The isotherm data were best fitted by the Langmuir, Hill and Sips models. Pb²⁺ ions could be desorbed from MWCNT-ADIF up to 92% at pH=3 and the recycled MWCNT-ADIF could be reused for 5 regeneration cycles.

多壁碳纳米管官能化与3-氨基-图5a，图10a二羟基苯[ b ]茚并[2,1 d ]呋喃-10-酮（ADIF），（MWCNT-ADIF），被用作吸附剂，以除去铅离子（Pb ²⁺）来自水溶液。通过FT-IR，SEM，TGA和DTG对样品进行表征。以分批方式研究了pH，初始Pb ²⁺浓度，吸附剂量和接触时间对吸附动力学和平衡的影响。Pb ^2+的吸附等温线使用四个两参数模型（Langmuir，Freundlich，Tempkin，Dubinin-Radushkevich）和六个三个参数模型（Redlich-Peterson，Khan，Sips，Radke-Prausnitz，Toth，Hill）研究离子。用拟一级动力学模型，拟二级动力学模型和颗粒内扩散模型研究了吸附动力学。使用三种误差分析方法（相关系数，卡方检验和平均相对误差）来确定最佳拟合等值线。结果表明，吸附动力学最好用伪二级动力学模型来描述。误差分析表明，三参数模型比两参数模型更好地描述了Pb ^2+的吸附数据。等温线数据最好由Langmuir，Hill和Sips模型拟合。铅含量在pH = 3的情况下，2 ⁺离子可从MWCNT-ADIF解吸高达92％，回收的MWCNT-ADIF可重复使用5个再生周期。