氨基磷酸树脂负载镧化合物杂化吸附剂的制备与性能

Synthesis and Properties of Amino Methylene Phosphonic Acid Resin-Supported Hydrated Lanthanum Oxide Hybrid Sorbent

制备了水合氧化镧(LaH)并将水合氧化镧负载于氨基磷酸树脂(APAR)上制得杂化吸附剂LaH-APAR,用红外光谱(FT-IR)、热重(TGA)对LaH-APAR的结构和热学性能进行了测试,并研究了pH值、温度对LaH及LaH-APAR吸附氟离子性能的影响。结果表明,La3+与APAR以配位键结合,LaH-APAR吸附剂在300℃以下比较稳定,它与LaH吸附性能基本相同,受pH值影响不大,可以在较宽的pH范围内使用;在pH不变的情况下,LaH-APAR随着温度的升高吸附速率也相应提高,属于温度控制吸附,且为化学吸附。

The hydrated lanthanum oxide（LaH） was synthesized and it was loaded on amino methylene phosphonic acid resin（APAR） to form the hybrid adsorbent LaH-APAR.The structure and thermal properties of LaH-APAR were tested using Fourier transform infrared spectrum（FT-IR） and thermogravimetric analysis（TGA）.And then,it was investigated that pH values and temperatures affected the adsorption property of LaH and LaH-APAR for fluoride ion.The results show that LaH-APAR hybrid sorbent formed by La3＋ and APAR with coordination bond is relatively stable below 300 ℃.Its adsorption property is similar to that of LaH,i.e.it is less affected by pH value,so it can be used in a wide pH range.Besides,under a stable pH,adsorption capacity of LaH-APAR also increases along with increasing temperature.As a result,it is a temperature-controlled sorbent and belongs to chemical adsorption.