Page 190 - 《精细化工》2022年第8期

第 39 卷第 8 期 精 细 化 工 Vol.39, No.8
2022 年 8 月 FINE CHEMICALS Aug. 2022

水处理技术与环境保护
好氧颗粒污泥对钇离子的吸附-解吸性能

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1*
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曾敏静 ，程媛媛 ，曾 玉 ，李正昊 ，吴俊峰 ，龙 焙
（1. 江西理工大学 土木与测绘工程学院，江西 赣州 341000；2. 河南省水体污染防治与修复重点实验
室，河南 平顶山 467036）
3+
摘要：探究了好氧颗粒污泥（AGS）对钇离子（Y ）的吸附-解吸效果。相比于搅拌及振荡，曝气混合下 AGS
3+
3+
具有更好的 Y 吸附效果，80%以上的吸附在前 10 min 完成。当初始 Y 质量浓度≤50 mg/L 时，AGS 能完全吸
2+
3+
+
3+
+
附废水中 Y 。H 、Na 和 Pb 会与 Y 竞争 AGS 上的吸附位点，导致吸附率减小。0.6~1.0 mm 的 AGS 吸附量
3+
最大，经过人工破碎后，2.4~3.0 mm 的 AGS 吸附量增大约 15%。AGS 对 Y 吸附动力学符合伪二级动力学模型
3+
2
（R =0.99），表明化学吸附起主导作用，颗粒内扩散是影响吸附速率的主要因素。AGS 对 Y 吸附热力学符合
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Langmuir 模型（R =0.9849），表明吸附过程是一个单分子层吸附过程，拟合得到最大吸附量为 24.39 mg/g MLSS
3+ +
（MLSS 为污泥）。XPS 表征发现，参与吸附官能团有酯基、羧基、氨基，同时 Y 与 K 进行离子交换。HNO 3
的单次解吸率（99.8%）明显高于 NH 4 Cl（63.2%），但 5 次吸附-解吸附循环后，HNO 3 解吸率降至 10%，NH 4 Cl
解吸率仍维持在 50%。
3+
关键词：好氧颗粒污泥；钇离子（Y ）；吸附；解吸附；吸附机理；水处理技术
中图分类号：X703.1 文献标识码：A 文章编号：1003-5214 (2022) 08-1690-09
Adsorption-desorption performances of aerobic
granular sludge for yttrium ion
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ZENG Minjing , CHENG Yuanyuan , ZENG Yu , LI Zhenghao , WU Junfeng , LONG Bei
(1. School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou
341000, Jiangxi, China; 2. Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology,
Pingdingshan 467036, Henan, China)
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Abstract: The adsorption-desorption performances of aerobic granular sludge (AGS) for yttrium ion (Y )
under different reaction conditions were investigated, of which adsorption effect under aeration, with more
3+
than 80% of Y adsorbed in the first 10 min, was higher than that under agitation and oscillation conditions.
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It was also found that AGS could adsorb all Y from wastewater when the initial mass concentration of Y 3+
was less than or equal 50 mg/L. However, adsorption efficiency would decrease due to competition for the
+
2+
+
adsorption sites on AGS by H , Na and Pb . Moreover, AGS with particle size of 0.6~1.0 mm exhibited
maximum adsorption capacity while that in 2.4~3.0 mm, when crushed manually, showed an increase of
3+
about 15% in adsorption capacity. The adsorption kinetics of AGS to Y was fitted to the pseudo-
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second-order model (R =0.99), indicating that chemisorption played a dominant role with intra-particle
3+
diffusion the main factor affecting the adsorption rate. The thermodynamics of adsorption of AGS to Y
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was consistent with Langmuir model (R =0.9849), showing that the adsorption process was a monolayer
adsorption process with the fitted maximum adsorption capacity 24.39 mg/g MLSS(MLSS represents
sludge). Meanwhile, XPS characterization displayed that the functional groups contributing to the
adsorption were mainly ester group, carboxyl group and amino group as well as ion exchange between Y 3+
+
and K . For desorption, the single desorption efficiency of HNO 3 (99.8%) was significantly higher than that

收稿日期：2022-03-03; 定用日期：2022-05-19; DOI: 10.13550/j.jxhg.20220179
基金项目：国家自然科学基金（52060007）；江西省教育厅科技项目（GJJ190502）；江西理工大学研究生创新专项资金项目（XY2021-
S024）；江西省大学生创新训练计划项目（S202110407051）；河南省水体污染防治与修复重点实验室开放基金（CJSP2021004）
作者简介：曾敏静（1998—），男，硕士生，E-mail：836298052@qq.com。联系人：龙 焙（1986—），男，副教授，E-mail: 17770132146@
189.cn。