活性炭颗粒稳定化纳米级Pd/Fe复合颗粒对2-氯联苯的还原脱氯

doi:10.16085/j.issn.1000-6613.2017-0298

化工进展 ›› 2017, Vol. 36 ›› Issue (12): 4493-4500.DOI: 10.16085/j.issn.1000-6613.2017-0298

活性炭颗粒稳定化纳米级Pd/Fe复合颗粒对2-氯联苯的还原脱氯

赵德明¹, 付聪¹, 毕柳¹, 蒋军荣²

1 浙江工业大学化学工程学院, 浙江杭州 310014;
2 台州职业技术学院生物与化工学院, 浙江台州 318000

收稿日期:2017-02-24 修回日期:2017-08-07 出版日期:2017-12-05 发布日期:2017-12-05
通讯作者: 赵德明(1976-),男,博士,副教授,主要研究方向为持久性污染物治理。
作者简介:赵德明(1976-),男,博士,副教授,主要研究方向为持久性污染物治理。E-mail:dmzhao@zjut.edu.cn。
基金资助:
浙江省自然科学基金（LY15B070005）及浙江省科技厅公益技术研究社会发展项目（2015C33233）。

Reductive dechlorination of 2-chlorobiphenyl by granular activated carbon stabilized Pd/Fe nanoparticles

ZHAO Deming¹, FU Cong¹, BI Liu¹, JIANG Junrong²

1 College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China;
2 School of Biological & Chemical Engineering, Taizhou Vocational & Technical College, Taizhou 318000, Zhejiang, China

Received:2017-02-24 Revised:2017-08-07 Online:2017-12-05 Published:2017-12-05

摘要/Abstract

摘要： 利用超声波强化液相还原法制备活性炭颗粒（GAC）稳定化纳米级Pd/Fe复合颗粒，并对2-氯联苯（2-CB）进行催化还原脱氯研究。结果表明：40kHz超声波辐照强化下制备的GAC稳定化纳米级Pd/Fe复合颗粒的比表面积、粒径和分散性均较普通液相还原法制备的复合颗粒有明显改善，粒径均在100nm以下，比表面积增大了21.73%。当复合颗粒钯化率为0.3%（质量分数）且GAC和Pd/Fe投加量分别为0.15g/L和5.0g/L时，在反应温度25℃、初始pH为3的条件下反应300min后，对初始质量浓度为10mg/L的2-CB降解率近95%，符合拟一级反应动力学，反应速率常数为3.88×10^-2min^-1。

关键词: 超声波, 活性炭颗粒, 纳米级Pd/Fe颗粒, 2-氯联苯, 催化, 还原, 动力学

Abstract: Granular activated carbon(GAC) stabilized Pd/Fe nanoparticles were prepared by using ultrasound-assisted liquid phase reductive method. The influence factors and degradation kinetics of 2-chlorobiphenyl(2-CB) catalytic reductive dechlorination by GAC stabilized Pd/Fe nanoparticles were explored. The experimental results showed that the diameters and specific surface areas of most particles prepared under 40kHz and 150W ultrasound were obviously modified. The diameters of most particles were less than 100nm and the specific surface areas were increased by 21.73%. Up to 95% of 2-CB was removed in 300min with mass fraction of Pd in GAC stabilized Pd/Fe nanoparticles of 0.3%,initial 2-CB concentration of 5mg/L,GAC dosage of 0.15g/L, Pd/Fe nanoparticles of 5.0g/L, initial pH=3.0,and reaction temperature of 25℃. The degradation of 2-CB followed pseudo-first-order kinetics reaction and the apparent pseudo-first-order kinetics constant was 3.88×10^-2min^-1.

Key words: ultrasound, granular activated carbon(GAC), Pd/Fe nanoparticles, 2-chlorobiphenyl, catalysis, reduction, kinetics

中图分类号:

X78
TQ209

赵德明, 付聪, 毕柳, 蒋军荣. 活性炭颗粒稳定化纳米级Pd/Fe复合颗粒对2-氯联苯的还原脱氯[J]. 化工进展, 2017, 36(12): 4493-4500.

ZHAO Deming, FU Cong, BI Liu, JIANG Junrong. Reductive dechlorination of 2-chlorobiphenyl by granular activated carbon stabilized Pd/Fe nanoparticles[J]. Chemical Industry and Engineering Progress, 2017, 36(12): 4493-4500.

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活性炭颗粒稳定化纳米级Pd/Fe复合颗粒对2-氯联苯的还原脱氯

Reductive dechlorination of 2-chlorobiphenyl by granular activated carbon stabilized Pd/Fe nanoparticles

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