Abstract A simple and reliable method has been developed using chelating polymeric adsorbent (PSAHSB) to preconcentration of trace amount of Ni(II) ions from aqueous solutions under static loading conditions, and their determination by Ultraviolet and visible (UV–Vis) absorption spectroscopy. The influences of some analytical adsorption parameters, such as pH, temperature and contact time, the ionization constants of chelating groups in the adsorbent and desorption process were investigated. Maximum adsorption ≥98% was achieved at pH 3–7 after 20 min of contact time and the relative standard-deviation values were ≤5%. Adsorbed metal ions have been desorbed with 10 mL of 2 M HCl acid with the detection limit of 0.0157 μg m−1. The Langmuir and Freundlich isotherm equations were used to describe adsorption behavior of the system at different temperatures. Kinetic and thermodynamic behavior of the adsorbent for Ni(II) ion preconcentration was also studied. The possible adsorption mechanism of Ni (II) ions onto modified adsorbent is also discussed. This method was applied efficiently to remove Ni (II) ions from environmental water samples.

中文翻译：

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使用新型低成本螯合聚苯乙烯吸附剂从水溶液中预浓缩痕量镍

摘要 开发了一种使用螯合聚合物吸附剂 (PSAHSB) 在静态负载条件下从水溶液中预浓缩痕量 Ni(II) 离子的简单而可靠的方法，并通过紫外和可见光 (UV-Vis) 吸收光谱对其进行测定。研究了一些分析吸附参数，如pH、温度和接触时间，吸附剂和解吸过程中螯合基团的电离常数的影响。接触时间 20 分钟后，在 pH 3-7 下达到最大吸附≥98%，相对标准偏差值≤5%。吸附的金属离子已被 10 mL 2 M HCl 酸解吸，检测限为 0.0157 μg m-1。Langmuir 和 Freundlich 等温方程用于描述系统在不同温度下的吸附行为。还研究了用于 Ni(II) 离子预浓缩的吸附剂的动力学和热力学行为。还讨论了 Ni (II) 离子在改性吸附剂上的可能吸附机制。该方法可有效去除环境水样中的 Ni (II) 离子。