期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 403, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.123626
关键词
Humic acid; Bubble discharge; Activated carbon; Synergistic effects; Mineralization mechanism
资金
- National Natural Science Foundation of China [51677019, 51977023, 11965018]
- Fundamental Research Funds for the Central Universities [DUT18LK42]
This study achieved efficient HA degradation with an ultra-high synergetic intensity by combining bubble discharge with activated carbon; adding AC greatly improved HA removal efficiency and degradation speed; during the plasma process, the presence of AC promoted the adsorption and oxidation of HA.
Humic acid (HA) removal research focuses on the global water treatment industry. In this work, efficient HA degradation with an ultra-high synergetic intensity is achieved by combined bubble discharge with activated carbon (AC). Adding AC to the discharge greatly improves HA removal efficiency and degradation speed; the synergetic intensity reaches 651.52% in the combined system, and the adsorption residual on AC is 4.52%. After 90 min of treatment, the HA removal efficiency reaches 98.90%, 31.29%, and 7.61% in the plasma-AC combined, solo bubble discharge, and solo AC adsorption systems, respectively. During the plasma process, the number of pore structures and active sites and the amount of oxygen-containing functional groups on the AC surface increase, resulting in a higher adsorption capacity to reactive species (H2O2 and O-3) and HA and promoting interactions on the AC surface. For HA mineralization, the presence of AC greatly promotes the destruction of aromatic structures and chromophoric HA functional groups.
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