Electrooxidation of aminomethyl phosphonic acid (AMPA) using a boron doped diamond anode

被引:0
|
作者
Zhao, Jiaxiang [1 ]
Yang, Zilan [1 ]
Wang, Qingshi [2 ]
Alderman, Brandon [1 ]
Zou, Shiqiang [1 ,3 ]
机构
[1] Auburn Univ, Dept Civil & Environm Engn, Auburn, AL 36849 USA
[2] Univ Alabama, Dept Civil Construct & Environm Engn, Tuscaloosa, AL 35487 USA
[3] 205 W Magnolia Ave,238 Harbert Engn Ctr, Auburn, AL 36849 USA
来源
关键词
Aminomethyl phosphonic acid; Electrochemically assisted oxidation; Hydroxyl radical; Hydrogen peroxide; Degradation kinetics; GLYPHOSATE; WATER; DEGRADATION; OXIDATION; MINERALIZATION; GROUNDWATER; HERBICIDE; TRANSPORT; REMOVAL; ZONE;
D O I
10.1016/j.jece.2023.111669
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Glyphosate, a commonly used herbicide, can transform into aminomethyl phosphonic acid (AMPA, CH6NO3P) in the aquatic environment. This AMPA can bioaccumulate in the food chain, damage living organisms at cellular and embryonic levels, and trigger eutrophication by releasing bioavailable phosphorus. Electrooxidation (EO) offers a promising strategy to neutralize organic pollutants, yet limited research has extended EO to manage AMPA in diluted water matrices. In this study, we determine EO's kinetics in degrading low-concentration AMPA and evaluate operational strategies to boost EO's performance under diffusion-limited conditions. Results of the batch systems indicate that AMPA can be degraded via direct and indirection oxidation under 2.5 V. The former takes place on an anode surface through direct electron transfer, while indirect oxidation is achieved via elec-trochemically generated reactive species such as center dot OH and H2O2. We find all degradation products to be inorganic ions, with no accumulation of organic intermediates. Further decrease of AMPA levels from 0.1 to 0.01 mM poses a diffusion-limited condition to our EO system, suppressing AMPA degradation efficiency from 97.2% to 84.2%. We subsequently increased the electric driving force from 2.5 to 3.0 V and obtained a 98.8% 0.01 mM AMPA removal. The long-term performance of a continuous-flow reactor reveals EO is governed by electrode surface area and hydraulic retention time (HRT), with the highest removal rate of 6.6 mg m- 2 h-1 at 3.5-h HRT. Our results indicate that EO can efficiently remove diluted AMPA in water matrices and warrants future efforts in electrode and reactor design to effectively counter mass transfer constraints.
引用
收藏
页数:8
相关论文
共 50 条
  • [1] Electrooxidation of ethylenediaminetetraacetic acid at a polycrystalline boron-doped diamond anode
    Denisova, A. E.
    Pleskov, Yu. V.
    [J]. RUSSIAN JOURNAL OF ELECTROCHEMISTRY, 2008, 44 (09) : 1083 - 1085
  • [2] Electrooxidation of ethylenediaminetetraacetic acid at a polycrystalline boron-doped diamond anode
    A. E. Denisova
    Yu. V. Pleskov
    [J]. Russian Journal of Electrochemistry, 2008, 44 : 1083 - 1085
  • [3] ELECTROOXIDATION OF FOLIC ACID USING BORON-DOPED DIAMOND ELECTRODE
    de Araujo, E. G.
    de Araujo, D. M.
    da Silva, M. L.
    Martinez-Huitle, C. A.
    da Silva, D. R.
    Fernandes, N. S.
    [J]. OXIDATION COMMUNICATIONS, 2014, 37 (02): : 596 - 604
  • [4] Electrochemical incineration of sulfanilic acid at a boron-doped diamond anode
    EI-Ghenymy, Abdellatif
    Arias, Conchita
    Lluis Cabot, Pere
    Centellas, Francesc
    Antonio Garrido, Jose
    Maria Rodriguez, Rosa
    Brillas, Enric
    [J]. CHEMOSPHERE, 2012, 87 (10) : 1126 - 1133
  • [5] Sulfate-mediated electrooxidation of X-ray contrast media on boron doped diamond anode
    Radjenovic, Jelena
    Petrovic, Mira
    [J]. WATER RESEARCH, 2016, 94 : 128 - 135
  • [6] Role of Hydroxyl Radicals During the Competitive Electrooxidation of Organic Compounds on a Boron-Doped Diamond Anode
    K. Groenen-Serrano
    E. Weiss-Hortala
    A. Savall
    P. Spiteri
    [J]. Electrocatalysis, 2013, 4 : 346 - 352
  • [7] Mixed first and zero order kinetics in the electrooxidation of sulfamethoxazole at a boron-doped diamond (BDD) anode
    Li, Shuhuan
    Bejan, Dorin
    McDowell, M. S.
    Bunce, Nigel J.
    [J]. JOURNAL OF APPLIED ELECTROCHEMISTRY, 2008, 38 (02) : 151 - 159
  • [8] Mixed first and zero order kinetics in the electrooxidation of sulfamethoxazole at a boron-doped diamond (BDD) anode
    Shuhuan Li
    Dorin Bejan
    M. S. McDowell
    Nigel J. Bunce
    [J]. Journal of Applied Electrochemistry, 2008, 38 : 151 - 159
  • [9] Role of Hydroxyl Radicals During the Competitive Electrooxidation of Organic Compounds on a Boron-Doped Diamond Anode
    Groenen-Serrano, K.
    Weiss-Hortala, E.
    Savall, A.
    Spiteri, P.
    [J]. ELECTROCATALYSIS, 2013, 4 (04) : 346 - 352
  • [10] Chemometric study on the electrochemical incineration of diethylenetriaminepentaacetic acid using boron-doped diamond anode
    Xian, Jiahui
    Liu, Min
    Chen, Wei
    Zhang, Chunyong
    Fu, Degang
    [J]. CHEMOSPHERE, 2018, 198 : 257 - 265