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US/Zn0体系降解水中的对硝基苯甲酸

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宋亚丽, 张光明, 常爱敏, 王丽, 宗栋良. US/Zn0体系降解水中的对硝基苯甲酸[J]. 环境工程学报, 2014, 8(5): 1797-1801.
引用本文: 宋亚丽, 张光明, 常爱敏, 王丽, 宗栋良. US/Zn0体系降解水中的对硝基苯甲酸[J]. 环境工程学报, 2014, 8(5): 1797-1801.
shu
Song Yali, Zhang Guangming, Chang Aimin, Wang Li, Zong Dongliang. Degradation of p-nitrobenzoic acid by US/Zn0 system[J]. Chinese Journal of Environmental Engineering, 2014, 8(5): 1797-1801.
Citation: Song Yali, Zhang Guangming, Chang Aimin, Wang Li, Zong Dongliang. Degradation of p-nitrobenzoic acid by US/Zn0 system[J]. Chinese Journal of Environmental Engineering, 2014, 8(5): 1797-1801.
shu

US/Zn0体系降解水中的对硝基苯甲酸

  • 1.

    哈尔滨工业大学市政环境工程学院, 哈尔滨 150090

  • 2.

    中国人民大学环境学院, 北京 100872

  • 3.

    深圳市水质检测中心, 深圳 440300

  • 基金项目:

    深圳市科技研发资金项目（JSF201006300042A）

    国家自然科学基金资助项目（51278489）

  • 中图分类号: X703

Degradation of p-nitrobenzoic acid by US/Zn0 system

  • 1.

    School of Municipal & Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China

  • 2.

    School of Environment & Natural Resource, Renmin University of China, Beijing 100872, China

  • 3.

    Shenzhen Water Quality Monitoring Center, Shenzhen 440300, China

  • Fund Project:

  • 摘要: 为高效去除水体中的对硝基苯甲酸、开发新型水处理技术，提出以超声与单质锌联用降解水中的对硝基苯甲酸。考察了锌投加量、溶液初始pH、声功率及溶液初始浓度对拟一级反应速率常数（kUS/Zn0）的影响，比较了US、Zn0和US/Zn0 3体系下的降解常数，并对US/Zn0体系的降解机理进行了初探。结果表明，以上4种因素对kUS/Zn0均有很大影响，kUS/Zn0分别在溶液初始pH为5、声功率为120 W、溶液初始浓度为0.04 mmol/L时达到最大值，且随着锌投加量的增加而增加。超声与单质锌在降解对硝基苯甲酸的过程中存在很好的协同作用，在最优条件下，kUS/Zn0=0.052 min-1，分别是单独超声降解及单独锌降解的21.5倍和2.53倍。在联用体系中，主要是依靠OH·氧化及单质锌还原的相互加强来去除对硝基苯甲酸。
    Abstract: Degradation of p-NBA by ultrasound-Zn0 was investigated in order to develop a new method for aqueous pollutants control. Important factors including Zn0 dose, initial pH, ultrasonic power and initial p-NBA concentration were examined for their impacts on the pseudo-first-order constant of p-NBA degradation. The degradation mechanisms were investigated as well. The results indicate that ultrasound-Zn0 can effectively degrade p-NBA and show significant promoting effects. All examined factors influence the rate constant. The optimal conditions are as follows: initial pH of 5, ultrasonic power of 120 W, initial p-NBA concentration of 0.04 mmol/L. Under the optimal conditions, kUS/Zn0 is 0.052 min-1, which is 21.5 times of kUS and 2.53 times of kZn0. The potential mechanisms are OH·oxidation and Zn0 reduction.
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出版历程
  • 收稿日期:  2013-05-07
  • 刊出日期:  2014-05-06
宋亚丽, 张光明, 常爱敏, 王丽, 宗栋良. US/Zn0体系降解水中的对硝基苯甲酸[J]. 环境工程学报, 2014, 8(5): 1797-1801.
引用本文: 宋亚丽, 张光明, 常爱敏, 王丽, 宗栋良. US/Zn0体系降解水中的对硝基苯甲酸[J]. 环境工程学报, 2014, 8(5): 1797-1801.
shu
Song Yali, Zhang Guangming, Chang Aimin, Wang Li, Zong Dongliang. Degradation of p-nitrobenzoic acid by US/Zn0 system[J]. Chinese Journal of Environmental Engineering, 2014, 8(5): 1797-1801.
Citation: Song Yali, Zhang Guangming, Chang Aimin, Wang Li, Zong Dongliang. Degradation of p-nitrobenzoic acid by US/Zn0 system[J]. Chinese Journal of Environmental Engineering, 2014, 8(5): 1797-1801.
shu

US/Zn0体系降解水中的对硝基苯甲酸

  • 1. 哈尔滨工业大学市政环境工程学院, 哈尔滨 150090
  • 2. 中国人民大学环境学院, 北京 100872
  • 3. 深圳市水质检测中心, 深圳 440300
  • 收稿日期:  2013-05-07
基金项目:

深圳市科技研发资金项目（JSF201006300042A）

国家自然科学基金资助项目（51278489）

摘要: 为高效去除水体中的对硝基苯甲酸、开发新型水处理技术，提出以超声与单质锌联用降解水中的对硝基苯甲酸。考察了锌投加量、溶液初始pH、声功率及溶液初始浓度对拟一级反应速率常数（kUS/Zn0）的影响，比较了US、Zn0和US/Zn0 3体系下的降解常数，并对US/Zn0体系的降解机理进行了初探。结果表明，以上4种因素对kUS/Zn0均有很大影响，kUS/Zn0分别在溶液初始pH为5、声功率为120 W、溶液初始浓度为0.04 mmol/L时达到最大值，且随着锌投加量的增加而增加。超声与单质锌在降解对硝基苯甲酸的过程中存在很好的协同作用，在最优条件下，kUS/Zn0=0.052 min-1，分别是单独超声降解及单独锌降解的21.5倍和2.53倍。在联用体系中，主要是依靠OH·氧化及单质锌还原的相互加强来去除对硝基苯甲酸。

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