聚丙烯酸-丙烯酰胺高吸水树脂对硬水的软化性能

Softening property of poly(acrylic acid-co-acrylamide) superabsorbent resin to hard water

针对水中含有过多二价阳离子如钙离子等而使水质硬度较高的问题,使用丙烯酸、丙烯酰胺单体为主要原料,采用水溶液聚合法合成了具有三维网络结构和较高吸附能力的丙烯酸-丙烯酰胺高吸水树脂,然后用其做为硬水软化剂,对人工配置的浓度为3mmol/L的人工硬水进行吸附处理,研究了丙烯酸-丙烯酰胺高吸水树脂对人工硬水中所含钙离子的吸附能力.实验结果表明:所合成的丙烯酸-丙烯酰胺高吸水树脂对钙离子的最大吸附量为108mg/g,随着树脂用量的逐渐增加,树脂对钙离子的吸附率不断增大,最大吸附率可达76.2%以上.该方法原料来源广泛,生产过程中不产生污染,可给硬水软化提供一个新的技术参考思路.

Divalent absorbent polymer cations such as with three-dim water solution copolymerization of calcium ions in water can cause a certain hardness. A novel super- ensional network and strong adsorption capacity was prepared by acrylic acid （AA） and acrylic amide （AM）. The resin was chosen as the adsorbent to remove hardness from hard water samples as 3 mmol/L as calcium ion. The removal property was assessed by investigating treatment of hard water with different amount of poly（acrylic acid） resin. The results show that the maximum adsorption amount of the resin is 108 mg/g, the adsorption rate of the resin increases with the increase of the amount of resin. The resin generally removes more than 76.2% of the calcium ion from the tested water samples. This method provides water softening with a new techuplogy reference due to its widely resource and environment-friendly property.