摘要
通过悬浮共聚-表面氨基化反应制得三乙胺修饰的聚苯乙烯微球(TPM),考察了TPM去除水中硝酸盐的性能。试验结果表明,相较于颗粒活性炭(GAC)、大孔吸附树脂(XAD-4)和离子交换树脂(D201),TPM去除硝酸盐的效果较好。pH值对TPM吸附硝酸盐的效果有影响,当pH值为6~7时具有最大的硝酸盐吸附量(45.23 mg/g)。在有竞争离子存在的条件下,TPM对硝酸盐表现出良好的吸附选择性,这得益于其表面修饰的三乙胺基团上长烷基链的疏水作用。吸附饱和的TPM能够通过NaOH-NaCl混合溶液进行原位再生,再生后的TPM对硝酸盐的吸附性能保持稳定,从而可实现多批次循环吸附。
Triethylamine functionalized polystyrene microspheres ( TPM ) were prepared by suspension copolymerization and surface amination reaction, and selective removal of nitrate from water by TPM was investigated. Compared with granular activated carbon ( GAC), macroporous polystyrene resin (XAD-4) and ion exchange resin ( D201 ), it was found that TPM had better nitrate removal performance. The pH value had an influence on the effect of nitrate adsorption by TPM. When the pH value was 6 -7 , the maximum nitrate adsorption capacity of 45. 23 mg/g was obtained. Benefited from the hydrophobic effect provided by functionalized triethylamine of longer alkyl group, TPM demonstrated good adsorption selectivity to nitrate in the presence of competing ions. More attractively, the exhausted TPM could be regenerated in situ by NaOH-NaCl binary solution. After regeneration, adsorption property of nitrate by TPM remained stable, so that multiple batches of cyclic adsorption could be achieved.
作者
黄驰
闫楠
郭家旺
吴帆
卢慧洁
王继承
杨文澜
张莉莉
HUANG Chi;YAN Nan;GUO Jia-wang;WU Fan;LU Hui-jie;WANG Ji-cheng;YANG Wen-Ian;ZHANG Li-li(School of Erwironmental Science & Engineering,Yangzhou University,Yangzhou 225127 ,China;Jiangsu Provincial Key Laboratory of Environmental Engineering,Nanjing 210036,China;Jiangsu Engineering Laboratory for Environmental Functional Materials,Huaiyin Normal University,Huai 'an 223300,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第19期77-81,共5页
China Water & Wastewater
基金
江苏省环境工程重点实验室开放基金资助项目(KF2018-004)
江苏省环境功能材料工程实验室开放课题(JSEFM201804)
江苏省研究生实践创新计划项目(SJCX18_0801)
大学生创新创业训练计划项目(X20180465)
