钴掺杂NaP分子筛合成及其吸附Pb(II)性能

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (2): 653-657.

所属专题：新型功能材料

钴掺杂NaP分子筛合成及其吸附Pb(II)性能

陈彦广^1,2, 孙杰^1,2, 吴晓辉³, 张亚男^1,2, 邓冀童^1,2, 韩洪晶^1,2, 张梅^1,2, 关金双^1,2

1.东北石油大学化学化工学院,大庆 163318;
2.黑龙江省石油与天然气化工省重点实验室,大庆 163318;
3.南昌市卫生学校化学教研室,南昌 330000

收稿日期:2020-09-21 修回日期:2020-10-21 出版日期:2021-02-15 发布日期:2021-03-10
作者简介:陈彦广(1979—),男,博士,教授。主要从事催化材料设计合成及污染物资源化利用方面的研究。E-mail:ygchen79310@126.com
基金资助:
国家自然科学基金(51674089,21908021);黑龙江省杰出青年基金(JC2018002);东北石油大学青年基金(2018QNL-17)

Preparation of NaP Zeolite Doped with Cobalt and Its Adsorption Performance for Pb(II)

CHEN Yanguang^1,2, SUN Jie^1,2, WU Xiaohui³, ZHANG Yanan^1,2, DENG Jitong^1,2, HAN Hongjing^1,2, ZHANG Mei^1,2, GUAN Jinshuang^1,2

1. School of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China;
2. Heilongjiang Provincial Key Laboratory of Oil and Gas Chemical Technology, Daqing 163318, China;
3. Department of Chemistry, Nanchang Health School, Nanchang 330000, China

Received:2020-09-21 Revised:2020-10-21 Online:2021-02-15 Published:2021-03-10

摘要/Abstract

摘要： 以硅酸钠和偏铝酸钠为原料,通过水热合成法制备钴掺杂NaP分子筛,通过X射线衍射光谱(XRD)、扫描电子显微镜(SEM)、N₂吸附-脱附等表征手段对样品的晶相、形貌和孔结构进行表征分析,并对其Pb(II)吸附性能进行评价。结果表明:与未掺杂钴的NaP分子筛相比,掺杂量为n(Al₂O₃)∶n(Co(NO₃)₂)=8∶1的Co-NaP分子筛的比表面积增大了约5倍(从26.767 m²/g增大到162.490 m²/g);其孔容约增大了约2.5倍(从0.029 cm³/g增大到0.104 cm³/g)。吸附时间为120 min,吸附温度为25 ℃,Pb(II)初始浓度为100 mg/L时,Co-NaP分子筛对Pb(II)的去除率可达98.8%,以乙二胺四乙酸二钠为再生助剂,在30 ℃下再生30 min,可使吸附后时Co-NaP分子筛完全再生,再生后的吸附剂经过3次吸附-再生循环后,Pb(II)去除率仍可达97%。

关键词: NaP分子筛, Co掺杂, 水热合成法, 合成调控, Pb(II)吸附, 再生

Abstract: A series of NaP zeolites doped with cobalt were synthesized by hydrothermal synthesis method using the sodium silicate and the sodium meta-aluminate as raw material. The crystal phase, morphology and pore structures of NaP zeolite samples were characterized by X-ray diffraction spectroscopy (XRD), scanning electron microscope (SEM), and N₂ adsorption-desorption methods. Moreover, the adsorption performance of NaP zeolite doped with cobalt for Pb(II) was evaluated. The results show that the NaP zeolite doped with cobalt at n(Al₂O₃)∶n(Co(NO₃)₂)=8∶1 has a specific surface area of 162.490 m²/g, which is 5 times more than the undoped NaP zeolite (from 26.767 m²/g to 162.49 m²/g), and a pore volume of 0.104 cm³/g, which is 2.5 times more than the undoped NaP zeolite (from 0.029 cm³/g to 0.104 cm³/g). When the adsorption time is 120 min, the adsorption temperature is 25 ℃, and the initial concentration of Pb(II) is 100 mg/L, Co-NaP zeolite has a removal rate of 98.8% for Pb(II). Employing the EDTA-2Na as the regeneration regent, the adsorbed NaP zeolite is regenerated completely at 30 ℃ for 30 min. After three adsorption-regeneration cycles, Co-NaP zeolite has a better adsorption property for Pb(II), and the removal rate of Pb(II) keeps over for 97%.

Key words: NaP zeolite, Co doping, hydrothermal synthesis method, synthesis regulation, Pb(II) adsorption, regeneration

中图分类号:

TQ424.25

陈彦广, 孙杰, 吴晓辉, 张亚男, 邓冀童, 韩洪晶, 张梅, 关金双. 钴掺杂NaP分子筛合成及其吸附Pb(II)性能[J]. 硅酸盐通报, 2021, 40(2): 653-657.

CHEN Yanguang, SUN Jie, WU Xiaohui, ZHANG Yanan, DENG Jitong, HAN Hongjing, ZHANG Mei, GUAN Jinshuang. Preparation of NaP Zeolite Doped with Cobalt and Its Adsorption Performance for Pb(II)[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(2): 653-657.

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钴掺杂NaP分子筛合成及其吸附Pb(II)性能

Preparation of NaP Zeolite Doped with Cobalt and Its Adsorption Performance for Pb(II)

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