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author:

Yan, Zhongsen (Yan, Zhongsen.) [1] (Scholars:鄢忠森) | Chen, Xiaolei (Chen, Xiaolei.) [2] | Yu, Huarong (Yu, Huarong.) [3] | Qu, Fangshu (Qu, Fangshu.) [4] | Qu, Dan (Qu, Dan.) [5] | Chang, Haiqing (Chang, Haiqing.) [6] | van der Bruggen, Bart (van der Bruggen, Bart.) [7]

Indexed by:

Scopus SCIE

Abstract:

Although electrooxidation can remove refractory organics, a significant amount of energy is required for non-selective oxidation, and the oxygen evolution reaction (OER) contributes little to the process. In this study, the conventional electrolytic bubbles were enhanced to improve the performance of organic matter removal. Using humic acid as a model recalcitrant organic pollutant, a membrane electrochemical reactor (MER) was designed to separate mixed bubbles (e.g., H-2 and O-2) produced during electrooxidation with a diaphragm, thereby dividing the individual MER O-2 and MER H-2. The bubbles stability of MER O-2 was higher than that of conventional electrooxidation and aeration, which facilitated the removal of humic acid. Surfactants with different electrical characteristics were further used to enhance the interaction between the bubbles and humic acid. After the addition of cetyltrimethylammonium bromide (CTAB 80 mg/L), the positive charge of the MER O-2 bubbles intensified, inducing the removal of 92.8 % humic acid (250 mg/L) with an oxidation rate <3.7 %. Moreover, CTAB could be reused after foam fractionation. Using zeta potential distribution theory, the initial electrical properties of MER O-2 (+) and MER H-2 (-) were clarified, as well as the charge intensification by CTAB on MER O-2 bubbles. Besides, the acidification by MER imparted initial electrical properties to the bubbles and led to the aggregation of humic acid, and the humic acid adhering to the bubbles further isolated the merging of the bubbles. The application of enhanced electrolytic bubbles offers a novel approach to reducing energy consumption in humic acid removal via electrooxidation systems.

Keyword:

Acidification Electrolytic bubble Electrooxidation Humic acid Surfactant

Community:

  • [ 1 ] [Yan, Zhongsen]Fuzhou Univ, Coll Civil Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 2 ] [Chen, Xiaolei]Fuzhou Univ, Coll Civil Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 3 ] [Yu, Huarong]Guangzhou Univ, Key Lab Water Qual & Conservat Pearl River Delta, Guangzhou 510006, Peoples R China
  • [ 4 ] [Qu, Fangshu]Guangzhou Univ, Key Lab Water Qual & Conservat Pearl River Delta, Guangzhou 510006, Peoples R China
  • [ 5 ] [Qu, Dan]Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing Key Lab Source Control Technol Water Pollu, 35 Qinghua East Rd, Beijing 100083, Peoples R China
  • [ 6 ] [Chang, Haiqing]Sichuan Univ, Coll Architecture & Environm, Key Lab Deep Earth Sci & Engn, MOE, Chengdu 610207, Peoples R China
  • [ 7 ] [van der Bruggen, Bart]Katholieke Univ Leuven, Dept Chem Engn Proc Engn Sustainable Syst ProcESS, Celestijnenlaan 200F, B-3001 Leuven, Belgium

Reprint 's Address:

  • [Qu, Fangshu]Guangzhou Univ, Key Lab Water Qual & Conservat Pearl River Delta, Guangzhou 510006, Peoples R China;;[Qu, Dan]Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing Key Lab Source Control Technol Water Pollu, 35 Qinghua East Rd, Beijing 100083, Peoples R China

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Source :

WATER RESEARCH

ISSN: 0043-1354

Year: 2025

Volume: 281

1 1 . 5 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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