Page 213 - 《精细化工》2021年第11期
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第 38 卷第 11 期                            精   细   化   工                                 Vol.38, No.11
             2021 年 11 月                             FINE CHEMICALS                                 Nov.  2021


              水处理技术与环境保护
                        磷酰基乙酸改性粉煤灰基 SBA-15 的制备


                                        及选择性吸附稀土性能



                                                                      *
                            王   茜,桂晓光,周   祥,崔静磊 ,郭彦霞,程芳琴
                                     (山西大学  资源与环境工程研究所  山西  太原  030006)

                 摘要:以粉煤灰为硅源合成了介孔二氧化硅 SBA-15,对其进行磷酰基乙酸(PAA)功能化改性制备了 PAA-SBA-
                 15 吸附剂,对改性前后的吸附剂进行了 XRD、N 2 吸附-脱附、红外光谱表征。结果显示,改性后吸附剂的孔道
                                                                                                      3+
                                                                                            3+
                                                                                                 3+
                 保持高度有序。将 PAA-SBA-15 用于模拟溶液中稀土离子的吸附,发现 PAA-SBA-15 吸附剂对 Eu 、Gd 、Tb 、
                   3+
                                                                                                     3+
                                                                                     2+
                                                                                                3+
                                                                                           2+
                         3+
                 Nd 、Sm 的吸附量分别可达 18.6、23.2、21.9、22.6、20.2 mg/g。考察了竞争离子 Ca 、Mg 、Al 、Fe 对
                                                  3+
                 吸附稀土离子性能的影响。结果显示,Fe 的存在对 PAA-SBA-15 吸附稀土离子干扰性最强。吸附动力学和热
                 力学结果显示,PAA-SBA-15 对稀土离子的吸附符合准二级动力学和 Langmuir 等温吸附模型,吸附过程中化学
                 吸附占主导作用。
                 关键词:SBA-15;稀土离子;吸附;吸附动力学;等温吸附;水处理技术
                 中图分类号:O647.3;X703                 文献标识码:A
                 文章编号:1003-5214 (2021) 11-2359-09       开放科学 (资源服务)  标识码 (OSID):
                  Preparation of phosphoryl acetic acid modified fly ash-based SBA-15
                             and its selective adsorption for rare earth elements


                                                                       *
                    WANG Qian, GUI Xiaoguang, ZHOU Xiang, CUI Jinglei , GUO Yanxia, CHENG Fangqin
                     (Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan 030006, Shanxi, China)


                 Abstract: Mesoporous  silica SBA-15  was synthesized  using  fly ash as silicon source, and then
                 PAA-SBA-15 adsorbent was prepared by surface modification of SBA-15 by phosphoryl acetic acid (PAA).
                 The adsorbents before and after modification were characterized  by XRD,  N 2  adsorption-desorption and
                 infrared spectrometer. The  results showed that the  highly ordered  pores in the adsorbent remained  after
                 modification. The PAA-SBA-15 adsorbent was used to adsorb rare earth ions, and it was found that the
                                                          3+
                                           3+
                                      3+
                                                     3+
                                                3+
                 adsorption capacity for Eu , Gd , Tb , Nd , Sm  reached 18.6, 23.2, 21.9, 22.6, 20.2 mg/g, respectively.
                                                               3+
                                                       2+
                                                           3+
                                                 2+
                 The effect of competing ions such as Ca , Mg , Al , Fe  on the adsorption of rare earth ions was studied.
                                                     3+
                 The results indicated that the presence of Fe had the strongest interference on PAA-SBA-15 adsorption of
                 rare earth ions. Adsorption kinetics and thermodynamics displayed that the adsorption process fitted quasi-
                 second kinetics and Langmuir model, indicating chemical adsorption was dominated in the adsorption process.
                 Key words: SBA-15; rare earth ions; adsorption; adsorption kinetics; isothermal adsorption; water treatment
                 technology
                                                                                [2]
                 稀土元素由于独特的光、电、磁特性广泛应用                          的稀土矿日益减少 ,迫切需要稀土的其他来源保
                                                                                        [3]
            于航空航天、催化剂、荧光剂等领域。现代科技发                             证稀土长期供应。荧光废料 、永磁体废料                    [4-5] 、粉
                                                                               [7]
                                                                   [6]
                                        [1]
            展对稀土元素的需求持续增长 ,但可供开采利用                             煤灰 、地热流体 、电子垃圾              [8-9] 等中含有稀土元

                 收稿日期:2021-04-08;  定用日期:2021-08-03; DOI: 10.13550/j.jxhg.20210365
                 基金项目:国家自然科学基金项目(U1810205);山西省高等学校科技创新项目(2020L0022)
                 作者简介:王   茜(1994—),女,硕士生,E-mail:qian_wang170@163.com。联系人:崔静磊(1986—),男,副教授,E-mail:
                 cuijl@sxu.edu.cn。
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