| US/Zn~0体系降解水中的对硝基苯甲酸 |
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| 引用本文： | 宋亚丽,张光明,常爱敏,王丽,宗栋良. US/Zn~0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 |
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| 作者姓名： | 宋亚丽 张光明 常爱敏 王丽 宗栋良 |
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| 作者单位： | 哈尔滨工业大学市政环境工程学院, 哈尔滨 150090;中国人民大学环境学院, 北京 100872;深圳市水质检测中心, 深圳 440300;深圳市水质检测中心, 深圳 440300;深圳市水质检测中心, 深圳 440300 |
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| 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） |
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| 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(k0US/Zn)的影响,比较了US、Zn0和US/Zn03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k0US/Zn均有很大影响,k0US/Zn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,k0US/Zn=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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| 关 键 词： | 对硝基苯甲酸 超声波 单质锌 拟一级速率降解常数 |
| 收稿时间： | 2013-04-06 |
| 修稿时间： | 2013-05-07 |
Degradation of p-nitrobenzoic acid by US/Zn0 system |
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| Song Yali,Zhang Guangming,Chang Aimin,Wang Li and Zong Dongliang. Degradation of p-nitrobenzoic acid by US/Zn0 system[J]. Techniques and Equipment for Environmental Pollution Control, 2014, 8(5): 1797-1801 |
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| Authors: | Song Yali Zhang Guangming Chang Aimin Wang Li Zong Dongliang |
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| Affiliation: | School of Municipal & Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China;School of Environment & Natural Resource, Renmin University of China, Beijing 100872, China;Shenzhen Water Quality Monitoring Center, Shenzhen 440300, China;Shenzhen Water Quality Monitoring Center, Shenzhen 440300, China;Shenzhen Water Quality Monitoring Center, Shenzhen 440300, China |
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| 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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| Keywords: | p-nitrobenzoic acid ultrasound Zn0 pseudo-first-order constant |
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