Photochemical Reaction of Fe(Ⅲ)-organic Acid Complex in Seawater

Abstract

Abstract: The study on the photochemical reaction of Fe(Ⅲ)-organic acid complex in seawater was carried out by exposing the reaction solution to a high pressure lamp under different experimental conditions. The photo-reduction rate constants of Fe(Ⅲ) were affected by various factors including organic acid(OA) concentration, pH, light intensity and temperature. When the molar ratio of organic acid to Fe(Ⅲ) was above 2, the photo-reduction reaction of Fe(Ⅲ) exhibited a first-order reaction kinetic pattern at the initial stage, and remained nearly stable after 100 min, which could be described by the equation: [Fe(Ⅱ)]_tk_OA[OA][Fe(Ⅲ)]_ini×[1-exp-(k_OA[OA]+k_ox)_t]/(k_OA[OA]+k_ox).At near pH7, the activity of organic acids examined declined by the sequence below: tartaric acid>adipic acid>succinic acid>malic acid>malonic acid. Increase of irradiation intensity and decrease of pH value could enhance the photo-reduction rate of Fe(Ⅲ). On the contrary, when the temperature varied, the photo-reduction rate remained unchanged, which proved that the process of photo-reduction of Fe(Ⅲ) was a ligand-to-met al charge transfer process.

Key words: Fe(Ⅲ), Binary acid salt complex, Organic acid, Redox reaction, Free radical, Photochemical reaction, Seawater

CLC Number:

P734

TrendMD:

YANG Gui-Peng, ZHAO Run-De . Photochemical Reaction of Fe(Ⅲ)-organic Acid Complex in Seawater[J]. Chem. J. Chinese Universities, 2005, 26(8): 1527.

[1]	TANG Quanjun, LIU Yingxin, MENG Rongwei, ZHANG Ruotian, LING Guowei, ZHANG Chen. Application of Single-atom Catalysis in Marine Energy [J]. Chem. J. Chinese Universities, 2022, 43(9): 20220324.
[2]	CHU Yuyi, LAN Chang, LUO Ergui, LIU Changpeng, GE Junjie, XING Wei. Single-atom Cerium Sites Designed for Durable Oxygen Reduction Reaction Catalyst with Weak Fenton Effect [J]. Chem. J. Chinese Universities, 2022, 43(9): 20220294.
[3]	TIAN Xiaokang, ZHANG Qingsong, YANG Shulin, BAI Jie, CHEN Bingjie, PAN Jie, CHEN Li, WEI Yen. Porous Materials Inspired by Microbial Fermentation： Preparation Method and Application [J]. Chem. J. Chinese Universities, 2022, 43(10): 20220216.
[4]	ZHANG Xiaofei, LIU Jiaxin. Visible Light Induced Cyclization of O-Alkenylcarboxanilide to 2-Quinolinone [J]. Chem. J. Chinese Universities, 2022, 43(10): 20220274.
[5]	LI Lun, ZHANG Jingyan, LUO Jing, LIU Ren, ZHU Yi. Synthesis and Properties of UV/Vis-LED Excitable Photoinitiators Based on Coumarin Pyridinium Salt [J]. Chem. J. Chinese Universities, 2022, 43(10): 20220178.
[6]	LIU Simei, LIU Weihua, LU Manli, ZHANG Wenli, SHEN Rongfang, WANG Mouhua. Evolution of the Radicals in γ-Rays Irradiated Medical Grade Ultra-high Molecular Weight Polyethylene [J]. Chem. J. Chinese Universities, 2021, 42(8): 2602.
[7]	ZHUO Zengqing, PAN Feng. Progress of Key Electronic States in Lithium Ion Battery Materials Probed Through Soft X-ray Spectroscopy [J]. Chem. J. Chinese Universities, 2021, 42(8): 2332.
[8]	XU Wenyi,FENG Yisi. Oxidative Trifluoromethylation of CF₃SO₂Na with Olefins Mediated by Diacetyl^† [J]. Chem. J. Chinese Universities, 2020, 41(7): 1567.
[9]	WANG Qianying, CUI Shuxun. Investigation of Formation Mechanism of Polydopamine by Adding Free Radical Quencher ^† [J]. Chem. J. Chinese Universities, 2020, 41(6): 1378.
[10]	HU Zhiyuan, WAN Qiuxiang, ZHOU Hang, SONG Chuanjun, CHANG Junbiao. Synthesis of 6β-Hydroxy-5,5,8aβ-trimethyloctahydronaphthalen-1(2H)-one Toward the Establishment of the Scaffold of Phenylspirodrimane Meroterpenoid Natural Products ^† [J]. Chem. J. Chinese Universities, 2020, 41(5): 955.
[11]	ZUO Xiaoling, WU Chong, HUANG Anrong, LUO Jiaolian, LI Zhuyu, WANG Meng, ZHOU Ying, YU Hongna, GUO Jianbing. Visible-light-sensitive Versatile Fluorescent Brightener-based Photoinitiating Systems ^† [J]. Chem. J. Chinese Universities, 2020, 41(4): 811.
[12]	XIE Xin, ZHANG Xiao, LI Ruihan, SONG Xiaoxiao, LIU Lifen, GAO Congjie. Microstructure Regulation of the Reverse Osmosis Membrane to Improve the Boron Removal Performance ^† [J]. Chem. J. Chinese Universities, 2019, 40(9): 2033.
[13]	HUANG Yapan, SUN Xiaogang, LI Rui, LIANG Guodong, WEI Chengcheng, HU Hao. Suppression of Shuttle Effect of Lithium-sulfur Batteries by Tris(2-carboxyethyl)phosphine Interlayer ^† [J]. Chem. J. Chinese Universities, 2019, 40(11): 2375.
[14]	LI Xiang,WANG Huiying,WANG Hongqiang,YE Jinting,QIU Yongqing. Theoretical Studies on the Second-order Nonlinear Optical Properties of Ru^Ⅱ/Ⅲ Complexes of Bipyridyl^† [J]. Chem. J. Chinese Universities, 2018, 39(10): 2221.
[15]	LIU Huiqiang, PENG Chao, CHEN Ning, LIU Yangping. Novel Fluorescent/EPR Difunctional Probe for Detecting Hypochlorite^† [J]. Chem. J. Chinese Universities, 2017, 38(9): 1542.

Photochemical Reaction of Fe(Ⅲ)-organic Acid Complex in Seawater

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments