零价铁协同超声波降解2, 3, 4, 6-四氯酚的特性

戴友芝; 张良长; 田凯勋; 罗春香

环境化学

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戴友芝, 张良长, 田凯勋, 罗春香. 零价铁协同超声波降解2, 3, 4, 6-四氯酚的特性[J]. 环境化学, 2009, 28(1): 49-53.

引用本文:

戴友芝, 张良长, 田凯勋, 罗春香. 零价铁协同超声波降解2, 3, 4, 6-四氯酚的特性[J]. 环境化学, 2009, 28(1): 49-53.

DAI You-zhi, ZHANG Liang-chang, TIAN Kai-xun, LUO Chun-xiang . CHARACTERISTICS OF 2,,4,6-TETRACHLOROPHENOL DEGRADATION BY ULTRASOUND IN THE PRESENCE OF ELEMENT IRON[J]. Environmental Chemistry, 2009, 28(1): 49-53.

Citation:

DAI You-zhi, ZHANG Liang-chang, TIAN Kai-xun, LUO Chun-xiang . CHARACTERISTICS OF 2,,4,6-TETRACHLOROPHENOL DEGRADATION BY ULTRASOUND IN THE PRESENCE OF ELEMENT IRON[J]. Environmental Chemistry, 2009, 28(1): 49-53.

零价铁协同超声波降解2, 3, 4, 6-四氯酚的特性

1.
湘潭大学环境科学与工程系, 湘潭, 411105
基金项目:
国家自然科学基金资助项目(No.20477034)

湖南省教育厅资助科研项目(No.06C823)

CHARACTERISTICS OF 2,,4,6-TETRACHLOROPHENOL DEGRADATION BY ULTRASOUND IN THE PRESENCE OF ELEMENT IRON

1.
Department of Environmental Science and Technology, Xiangtan University, Xiangtan, 411105, China
Fund Project:

摘要: 研究了2,3,4,6-四氯酚(TeCP)在超声波/零价铁协同体系中的降解,结果表明,拟一级动力学能很好的拟合降解过程,协同体系中TeCP一级降解速率常数为0.0141min-1,为同等条件下零价铁体系降解速率常数的10.07倍,且大于两者之和,说明两者之间存在明显协同效应;零价铁(Fe0)投加量、初始pH值、初始TeCP浓度(C0)、超声功率和溶液离子强度等控制参数对TeCP降解速率的影响表明,其拟一级速率常数在Fe0量为2g·l-1,初始pH值为6.0,离子强度0.8mol·l-1Na2SO4以及超声功率50W时达最大值,并随着C0的升高而降低.
- 超声波 /
- 2,3,4,6-四氯酚 /
- 零价铁 /
- 降解
Abstract: The degradation of aqueous 2,3,4,6-tetrachlorophenol(TeCP)by ultrasound combined with element iron(US/Fe0)was investigated,the pseudo-first-order rate constant,kUS/Fe0,for TeCP degradation by US/Fe0 was 0.0141min-1,which was 10.07 times as large as kFe0,and greater than the sum of kus and kFe0,these evidences suggested that synergistic effects between US and Fe0 existed.The influences of Fe0dose([Fe0]), solution initial pH,initial TeCP concentration,solution ionic strength and ultrasonic power,on the rate constant of TeCP degradation by US/Fe0,were studied.The rate constant was found largest at[Fe0] 2 g·l-1,initial pH 6.0,0.8mol·l-1 Na2SO4 of ionic strength and 350 W of ultrasonic power respectively, and decrease with initial TeCP concentration increasing.
- ultrasonia /
- 2,3,4,6-tetrachlorophenol /
- zero-valent-iron /
- degradation

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戴友芝, 张良长, 田凯勋, 罗春香. 零价铁协同超声波降解2, 3, 4, 6-四氯酚的特性[J]. 环境化学, 2009, 28(1): 49-53.

引用本文:

戴友芝, 张良长, 田凯勋, 罗春香. 零价铁协同超声波降解2, 3, 4, 6-四氯酚的特性[J]. 环境化学, 2009, 28(1): 49-53.

Citation:

零价铁协同超声波降解2, 3, 4, 6-四氯酚的特性

1. 湘潭大学环境科学与工程系, 湘潭, 411105

收稿日期: 2008-01-30

基金项目:

国家自然科学基金资助项目(No.20477034)

湖南省教育厅资助科研项目(No.06C823)

关键词:

摘要: 研究了2,3,4,6-四氯酚(TeCP)在超声波/零价铁协同体系中的降解,结果表明,拟一级动力学能很好的拟合降解过程,协同体系中TeCP一级降解速率常数为0.0141min-1,为同等条件下零价铁体系降解速率常数的10.07倍,且大于两者之和,说明两者之间存在明显协同效应;零价铁(Fe0)投加量、初始pH值、初始TeCP浓度(C0)、超声功率和溶液离子强度等控制参数对TeCP降解速率的影响表明,其拟一级速率常数在Fe0量为2g·l-1,初始pH值为6.0,离子强度0.8mol·l-1Na2SO4以及超声功率50W时达最大值,并随着C0的升高而降低.

English Abstract

CHARACTERISTICS OF 2,,4,6-TETRACHLOROPHENOL DEGRADATION BY ULTRASOUND IN THE PRESENCE OF ELEMENT IRON

1. Department of Environmental Science and Technology, Xiangtan University, Xiangtan, 411105, China

Received Date: 2008-01-30

Fund Project:

Keywords:

Abstract: The degradation of aqueous 2,3,4,6-tetrachlorophenol(TeCP)by ultrasound combined with element iron(US/Fe0)was investigated,the pseudo-first-order rate constant,kUS/Fe0,for TeCP degradation by US/Fe0 was 0.0141min-1,which was 10.07 times as large as kFe0,and greater than the sum of kus and kFe0,these evidences suggested that synergistic effects between US and Fe0 existed.The influences of Fe0dose([Fe0]), solution initial pH,initial TeCP concentration,solution ionic strength and ultrasonic power,on the rate constant of TeCP degradation by US/Fe0,were studied.The rate constant was found largest at[Fe0] 2 g·l-1,initial pH 6.0,0.8mol·l-1 Na2SO4 of ionic strength and 350 W of ultrasonic power respectively, and decrease with initial TeCP concentration increasing.

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零价铁协同超声波降解2, 3, 4, 6-四氯酚的特性

CHARACTERISTICS OF 2,,4,6-TETRACHLOROPHENOL DEGRADATION BY ULTRASOUND IN THE PRESENCE OF ELEMENT IRON

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零价铁协同超声波降解2, 3, 4, 6-四氯酚的特性

English Abstract

CHARACTERISTICS OF 2,,4,6-TETRACHLOROPHENOL DEGRADATION BY ULTRASOUND IN THE PRESENCE OF ELEMENT IRON

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