ZnCl₂ activated carbon (ZnCl₂-AC, with specific surface area ~1480 m²/g) effectively adsorbs nitrate from water with uptake capacity (~5.5 mg/g) four-fold that for other commercial activated carbons (CACs). Kinetics show a small activation energy value (~7 kJ/mol) consistent with a diffusion-controlled process. This is further confirmed by intra-particle diffusion study. Negative thermodynamic parameters (ΔH° −13.859 kJ/mol, ΔS° −43.8 J/mol K, and ΔG° −0.808 kJ/mol) indicate spontaneous nitrate adsorption. The high specific surface area rationalizes the high uptake capacity for the ZnCl₂-AC. A Langmuir type adsorption, is observed. ZnCl₂-AC effectively adsorbs the nitrate from water, even at high concentrations, and brings the concentration to allowed maximum values. Despite these advantages, the ZnCl₂-AC exhibits low desorption (~20%) of pre-adsorbed nitrate ions into concentrate solutions. Up to ~40% desorption is observed by grinding the pre-saturated ZnCl₂-AC. Developing other methods to completely recover the adsorbed nitrate and the adsorbent for multiple use is needed.

ZnCl ₂活性炭（ZnCl ₂ -AC，比表面积〜1480 m ² / g）有效吸收水中的硝酸盐，吸收能力（〜5.5 mg / g）是其他商用活性炭（CAC）的四倍。动力学显示出较小的活​​化能值（〜7 kJ / mol），与扩散控制的过程一致。粒子内扩散研究进一步证实了这一点。负热力学参数（ΔH°-13.859 kJ / mol，ΔS°-43.8 J / mol K和ΔG°-0.808 kJ / mol）表示硝酸盐的自然吸附。高比表面积使ZnCl ₂ -AC的高吸收能力合理化。观察到朗缪尔型吸附。氯化锌₂-AC即使在高浓度下也能有效地从水中吸附硝酸盐，并使浓度达到允许的最大值。尽管具有这些优点，但ZnCl ₂ -AC表现出低的预吸附硝酸盐离子解吸度（〜20％）到浓缩液中。通过研磨预饱和的ZnCl ₂ -AC，观察到高达〜40％的解吸。需要开发其他方法以完全回收被吸附的硝酸盐和吸附剂以供多次使用。