Cyclopolymerization of N,N-diallylmethionine hydrochloride, derived from the biogenic amino acid methionine, (90 mol%) and cross-linker tetraallylpiperazinium dichloride (10 mol%) in presence of an azo-initiator afforded pH-responsive cross-linked polyzwitterion (CPZ). The structural morphology of the resin (i.e. CPZ) was examined by the BET and FESEM-EDX analyses. The methionine embedded resin demonstrated remarkable efficacies for the removal of Hg(II) ions at ppb levels. A 50 mg-dose of the resin immersed in aqueous medium (18 mL) could reduce the concentration of Hg(II) from 200 and 400 ppb to 1.8 and 4.4 ppb, respectively, within 15 min. The resin has also proven to be remarkably effective in the removal of several toxic and priority metal pollutants from industrial wastewater. The Hg(II) adsorption followed pseudo second-order process with E_a of 48.1 kJ mol^-1. The initial rapid adsorption of metal ions and subsequent slower adsorption was attributed to film and intraparticle diffusion, respectively. The SEM-EDX analyses revealed the attachment of Hg(II) ions onto the resin. The favorability of the endothermic adsorption was ensured by the negative ΔGº values. The efficient adsorption/desorption process confirmed the recyclability of the resin. The current resin demonstrated superior metal removal capacities as compared to several other adsorbents in recent works.

N，N的环聚合在偶氮引发剂的存在下衍生自生物氨基酸蛋氨酸的盐酸二烯丙基甲硫氨酸盐酸盐（90 mol％）和二氯化四烯丙基哌嗪鎓（10 mol％）交联剂提供了pH响应的交联聚两性离子（CPZ）。通过BET和FESEM-EDX分析检查了树脂（即CPZ）的结构形态。蛋氨酸包埋的树脂在ppb浓度下具有显着的去除Hg（II）离子的功效。将50 mg剂量的树脂浸入水性介质（18 mL）中，可以在15分钟内将Hg（II）的浓度分别从200和400 ppb降低到1.8和4.4 ppb。该树脂还被证明在去除工业废水中的几种有毒和优先金属污染物方面非常有效。Hg（II）的吸附遵循伪二阶过程与E_a为48.1kJ mol ^-1。金属离子最初的快速吸附和随后的较慢吸附分别归因于薄膜和颗粒内扩散。SEM-EDX分析显示Hg（II）离子附着在树脂上。吸热吸附的好感度是由负Δ确保ģ º值。有效的吸附/解吸过程证实了树脂的可回收性。与最近的工作中的其他几种吸附剂相比，当前的树脂表现出了优异的金属去除能力。