Homoionic soda-activated BNT’s (M-SABNT’s) were prepared by replacing the exchangeable cations of a commercial SABNT with the eco-friendly and cheap cations, Na⁺, K⁺, NH₄⁺, Mg²⁺ or Ca²⁺. The M-SABNT samples were characterized by X-ray diffraction, Fourier-transform infrared spectrometry, X-ray fluorescence, potentiometric titration, pH of zero point charge measurement, and chemical and thermogravimetric analysis. The adsorption of Pb(II) on the homoionic sorbents were studied at different pH values, time of shaking and initial concentration. The models of kinetics and adsorption isotherms of Pb(II) on K-, Mg- and Ca-SABNT’s were examined and suggested to follow the pseudo- 2nd order and Langmuir adsorption models, respectively. The Mg-SABNT was recommended for the application process because it was assumed as an applicable ion exchanger over a wide range of pH (5–9), equilibrated within a suitable time (30 min) and has the highest monolayer Pb(II) capacity (67.11 mg g⁻¹). The process was successfully applied on Pb(II)-spiked brackish water samples. The results confirmed the validity of the homoionic Mg-SABNT as a potential sorbent for the removal of Pb(II) from aqueous media of different salinity levels exceeding 3000 times the spiked Pb(II) contents with removal efficiencies of 55.5–95.3%.

通过用生态友好的廉价阳离子Na ⁺，K ⁺，NH ₄ ⁺，Mg ²⁺或Ca ²⁺代替商业SABNT的可交换阳离子，制备了纯碱苏打活化的BNT（M-SABNT）。。M-SABNT样品通过X射线衍射，傅里叶变换红外光谱，X射线荧光，电位滴定，零点电荷pH值以及化学和热重分析进行表征。研究了在不同pH值，振荡时间和初始浓度下Pb（II）在同型吸附剂上的吸附情况。研究了Pb（II）在K-，Mg-和Ca-SABNT上的动力学和吸附等温线模型，并建议分别遵循伪二级和Langmuir吸附模型。Mg-SABNT被推荐用于应用过程，因为它被认为是适用于广泛pH值（5–9）的离子交换剂，在适当的时间（30分钟）内达到平衡，并且具有最高的单层Pb（II）容量（67.11毫克g ^-1）。该方法已成功应用于掺有Pb（II）的微咸水样品中。结果证实了同质Mg-SABNT作为潜在的吸附剂的有效性，该吸附剂可以从不同盐度水平的水中介质中去除Pb（II），其浓度超过掺入的Pb（II）含量的3000倍，去除效率为55.5-95.3％。