[1]程若童,洪舒晨,李鑫隆,等.热塑性聚氨酯微塑料对三种重金属离子的吸附特性研究[J].浙江科技学院学报,2023,(05):439-447.[doi:10.3969/j.issn.1671-8798.2023.05.010]
 CHENG Ruotong,HONG Shuchen,LI Xinlong,et al.Study into adsorption characteristics of thermoplastic polyurethane(TPU)microplastics on three heavy metal ions[J].,2023,(05):439-447.[doi:10.3969/j.issn.1671-8798.2023.05.010]
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热塑性聚氨酯微塑料对三种重金属离子的吸附特性研究(/HTML)
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《浙江科技学院学报》[ISSN:2097-5236/CN:33-1431/Z]

卷:
期数:
2023年05期
页码:
439-447
栏目:
出版日期:
2023-10-31

文章信息/Info

Title:
Study into adsorption characteristics of thermoplastic polyurethane(TPU)microplastics on three heavy metal ions
文章编号:
1671-8798(2023)05-0439-09
作者:
程若童1洪舒晨1李鑫隆1薛向东12
(1.浙江科技学院 土木与建筑工程学院,杭州 310023; 2.浙江省废弃生物质循环利用与生态处理技术重点实验室,杭州 310023)
Author(s):
CHENG Ruotong1 HONG Shuchen1 LI Xinlong1 XUE Xiangdong12
(1.School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, Zhejiang, China; 2.Key Laboratory of Recycling and Eco-Treatment of Waste Biomass of Zhejiang Province, Hangzhou 310023, Zhejiang, China)
关键词:
热塑性聚氨酯微塑料吸附重金属
分类号:
X703
DOI:
10.3969/j.issn.1671-8798.2023.05.010
文献标志码:
A
摘要:
【目的】热塑性聚氨酯(thermoplastic polyurethane,TPU)作为环境中塑料污染的主要来源,其危害性尚没有被完全揭示,因此对有关TPU与污染物的相互作用机制及其迁移转化行为进行了研究。【方法】首先借助扫描电镜和红外光谱对TPU微塑料的表面形态和官能团进行了表征; 然后以Cu2+、Pb2+和Ni2+作为测试目标物,采取批处理吸附试验,研究了TPU对水相重金属离子的吸附动力学行为和等温吸附特征; 最后分析了离子强度、pH和温度等环境因素对平衡吸附量的影响,并就相关吸附机制进行了探讨。【结果】1)TPU微塑料对Cu2+、Pb2+和Ni2+的吸附符合准二级动力学和Elovich吸附模型,等温吸附符合Langmuir和Sips吸附模型。2)TPU吸附特征为表面非均匀性吸附,其中,化学性吸附为主要作用,物理性吸附为次要作用。3)TPU对Cu2+、Pb2+和Ni2+的平衡吸附量依次降低,显示出TPU对污染物的吸附具有优先选择性,其原因在于重金属离子之间物化性质的差异。4)TPU分子链中含有酯基、缩二脲基、脲基、氨基甲酸酯基及酰胺基等多种官能团,可通过表面络合与静电作用吸附水中的重金属离子,并表现出化学吸附的能力。【结论】本研究揭示的TPU对不同重金属离子的吸附特性差异可为后续环境中微塑料污染物与重金属离子等其他物质的复合污染问题提供参考。

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备注/Memo

备注/Memo:
收稿日期:2022-06-28
基金项目:国家自然科学基金项目(51878617); 浙江省嘉善县科技计划项目(2020D01); 浙江科技学院研究生教学研究项目(2021yjsjg01); 浙江科技学院研究生科研创新基金项目(2022yjsk(09))
通信作者:薛向东(1971— ),男,江苏省铜山人,教授,博士,主要从事水污染控制技术研究。E-mail:103130@zust.edu.cn。
更新日期/Last Update: 2023-10-31