Ultra-high synergetic intensity for humic acid removal by coupling bubble discharge with activated carbon

Zhou, Xiongfeng; Liang, Jianping; Zhao, Zhiyao; Yuan, Hao; Qiao, Jun‐Jie; Xu, Qingnan; Wang, Hongli; Wang, Wenchun; Yang, Dezheng

doi:10.1016/j.jhazmat.2020.123626

Cited by 28 publications

(10 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The absorbance of solution was detected through UV-vis spectrophotometer (SP-725 Shanghai Spectral Instrument Co., Ltd., Shanghai, China) with external standard method at a wavelength of 254 nm to determine the HA removal efficiency [20]. The equation was as follows:…”

Section: Methods and Analysesmentioning

confidence: 99%

Humic Acid Removal in Water via UV Activated Sodium Perborate Process

et al. 2022

View full text Add to dashboard Cite

Humic acid (HA) has complex molecular structure and is capable of adsorption, ion exchange, and chelation with organic and inorganic pollutants in water bodies, worsening water quality and jeopardizing human health and ecological environment. How to effectively remove HA from water is one of the research focuses of this paper. In this study, the UV-activated sodium perborate (SPB) synergistic system (UV/SPB) was established to eliminate HA in water. The effects of initial HA concentration, SPB dose, and initial pH value on the HA elimination were determined, and the main mechanisms of the synergy and HA degradation were explored. The outcomes show that the HA elimination ratio by the sole UV and only SPB system were only 0.5% and 1.5%, respectively. The HA removal of UV/SPB reached 88.8%, which can remove HA more effectively than other systems. Free radical masking experiment proved that hydroxyl radical produced by SPB activation is the main active substance for HA removal. The results of UV-vis absorption spectrum, absorbance ratio, specific UV absorbance, and excitation–emission matrix spectroscopy verified that the UV/SPB system can effectively decompose and mineralize HA.

show abstract

Section: Methods and Analysesmentioning

confidence: 99%

Humic Acid Removal in Water via UV Activated Sodium Perborate Process

et al. 2022

View full text Add to dashboard Cite

show abstract

“…To determine the effectiveness of the humic acid removal process, the solution's absorbance was measured using a UV-vis spectrophotometer and an external reference technique at a wavelength of 254 nm [20]. The mathematics formula read in Equation 1 as follows:…”

Section: Analysis and Proceduresmentioning

confidence: 99%

Ultraviolet-activated sodium perborate process (UV/SPB) for removing humic acid from water

Ibrahim

2022

Anal. Method Environ. Chem. J.

View full text Add to dashboard Cite

Humic acid (HA) has a complex chemical composition and the ability to chelate, adsorb, and exchange ions with organic and inorganic contaminants in bodies of water, which worsens water quality and poses a threat to human health and the environment. In this research, an Ultraviolet-activated sodium perborate (UV/SPB) symbiotic method (UV/SPB) was developed to eliminate humic acid in water. The major synergistic and degradative processes of the humic acid were investigated, as well as the impact of the starting humic acid concentration, sodium perborate dose, and primary pH value on the humic acid elimination. Results indicate that just 0.5 % and 1.5 % of humic acid were eliminated mostly by sole UV and sole sodium perborate (SPB) methods, respectively. More effectively than other methods, UV/SPB removed humic acid with an efficiency of 88.83%. An experiment using free radicals to mask them revealed that the primary catalyst for humic acid removal is the hydroxyl radical generated by sodium perborate activation. The excitation-emission matrix spectroscopy, Ultraviolet-visible absorption (UV-Vis) spectrum, absorbance ratio values, specific Ultraviolet-visible absorbance values (SUVA), and UV/SPB method performance findings demonstrated the UV/SPB method's capability to degrade and mineralize humic acid.

show abstract

“…Since Siemens found that ozone (O 3 ) can be artificially generated by dielectric barrier discharge (DBD) in 1857, 1 this method is still dominant today for large-scale production of industry O 3 which has excellent oxidation potential to oxidize chemical and biological substances 2–5 and been widely employed in various industrial applications including drinking and waste water treatment, 6–8 contaminated water and air disinfection, 9,10 material surface functional treatment, 11,12 and combustion gas desulfurization and denitrification. 13,14 In 1988, Masuda et al first confirmed that surface dielectric barrier discharge (SDBD) has the advantages of lower ignition voltage, reduced reactor size, and easier cooling surface discharge compared with other forms of DBD, which greatly reduces cost in both the ozonizer and its power supply.…”

Section: Introductionmentioning

confidence: 99%