Elimination of humic acid in water: comparison of UV/PDS and UV/PMS

Tang, Shoufeng; Tang, Jie; Yuan, Deling; Wang, Zetao; Zhang, Yating; Rao, Yandi

doi:10.1039/d0ra01787f

Cited by 71 publications

(20 citation statements)

References 63 publications

(54 reference statements)

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“…Similar trends also appeared in the UV/PMS removal of BPA by UV/PMS system. 42 HA containing plenty of carboxyl and hydroxyl groups can inhibit the degradation process by quenching radicals and competing with target contaminants for ROS. 43 Nevertheless, the removal efficiency of BPS was higher than 96% in the presence of 50 mg L −1 HA, revealing that the Ca(OH) 2 /PMS system was a promising process for the decontamination of BPS in water even contained a high concentration of HA.…”

Section: Resultsmentioning

confidence: 99%

Ca(OH)₂-mediated activation of peroxymonosulfate for the degradation of bisphenol S

Lin

Zhang

et al. 2021

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Ca(OH)₂-mediated activation of peroxymonosulfate for the degradation of bisphenol S

Lin

Zhang

et al. 2021

RSC Adv.

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“…The past few years have witnessed the development of micro-nanotechnology, and lots of functional materials have been studied. [149][150][151][152][153][154][155][156][157][158][159][160][161][162][163] Despite advances in laser-treated gradient functional surfaces, challenges, and opportunities remain. Reported studies are limited to a very small amount of living organisms with gradient structures, such as desert beetles, peristome, cacti, spiders, and pine needles.…”

Section: Discussionmentioning

confidence: 99%

Laser Fabrication of Bioinspired Gradient Surfaces for Wettability Applications

Yin

Xiao

et al. 2021

Adv Materials Inter

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materials with gradients inspired by biological surfaces has therefore attracted much interest. Strategies for preparing gradient surfaces include vapor-phase diffusion, gradual immersion, electrochemical oxidation, and photolithography that have broadly adopted. [20-26] However, their material constraints, tedious and time-consuming processes, and their single-pattern limit their widespread use. Developing a substrate-independent, facile and efficient, pattern-diverse method for preparing gradient surfaces would aid fundamental science and practical application. Among various techniques, laser processing has recently emerged as a powerful tool in integratedoptics and biomimetic micro-nanodevices. This technology can be used to precisely control the preparation of micro/nanoscale structures on various substrates such as metals, glass, ceramics, and polymers. [27-33] Besides, the high energy density of lasers allows the machining process to be completed quickly and efficiently. Combining laser machining with computer-aided control allows laser ablation parameters to be precisely controlled, including the processing position, scanning speed, scanning interval, and scanning track. Laser processing can therefore be used to produce flexible and diverse patterns in complex workpieces. And laser micro/nano fabrication has been applied to regulate surface wettability. [34-43] Therefore, laser processing has great potential for developing samples with different wettability and geometries on various materials. This review discusses laser fabrication of bioinspired gradient surfaces for wettability applications, whose overview is shown in Figure 1. The related backgrounds including gradient surfaces in natural creatures, the theoretical basis of wettability, and the distinct characteristics of laser processing are introduced. Gradient surfaces can be classified into wettability gradients and geometric gradients, and they are discussed in terms of various laser fabrication approaches and wettability applications. It is worth mentioning the definition of wettability gradient and geometric gradient in this review. Wettability gradient is defined as a surface with no obvious geometric change in the shape, and there is a difference of contact angles on the macro level resulting from the roughness gradient on the micro level. Geometric gradient is defined as a surface possessing significant geometric changes in the shape, but not much difference in the roughness of the entire surface at the microscopic level. Specially, a wettability gradient surface generates a water driving force as a result of its varying surface roughness. Wettability gradient surfaces can be applied in water droplet control, Inspired by nature, gradient surfaces have attracted broad research interest because of their potential in microfluidics, fog/water collection, and water electrolysis. Among the various techniques for preparing gradient surfaces, laser processing is substrate-independent, facile and efficient, patterndiverse, which can be used to prepare...

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“…III region indicates fulminate-like substances related to hydroxyl and carboxyl groups in the humus structure. The range of region IV corresponds to the small molecular structure of organic matter [35]. The V region indicates to humic-like fluorescence [42,43].…”

Section: Ha Decomposition Mechanismmentioning

confidence: 99%

“…When the H2PO4 − amount enhanced from 10 to 30 mmol L −1 , the HA elimination efficiencies were diminished from 86.3% to 82.4%. Although H2PO4 − can react with •OH• to form hydrogen phosphate radical (HPO4 − ) (Equation ( 17)) [35], the reaction rate is too low, which could not obviously impact the HA removal.…”

Section: Effect Of Common Anions In Watermentioning

confidence: 99%

Humic Acid Removal in Water via UV Activated Sodium Perborate Process

et al. 2022

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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.

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Elimination of humic acid in water: comparison of UV/PDS and UV/PMS

Abstract: In this work, UV-activated persulphate treatment (UV/PDS and UV/PMS) was found to be an effective method for HA removal.

Cited by 71 publications

References 63 publications

Ca(OH)₂-mediated activation of peroxymonosulfate for the degradation of bisphenol S

Ca(OH)₂-mediated activation of peroxymonosulfate for the degradation of bisphenol S

Laser Fabrication of Bioinspired Gradient Surfaces for Wettability Applications

Humic Acid Removal in Water via UV Activated Sodium Perborate Process

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Elimination of humic acid in water: comparison of UV/PDS and UV/PMS

Abstract: In this work, UV-activated persulphate treatment (UV/PDS and UV/PMS) was found to be an effective method for HA removal.

Cited by 71 publications

References 63 publications

Ca(OH)2-mediated activation of peroxymonosulfate for the degradation of bisphenol S

Ca(OH)2-mediated activation of peroxymonosulfate for the degradation of bisphenol S

Laser Fabrication of Bioinspired Gradient Surfaces for Wettability Applications

Humic Acid Removal in Water via UV Activated Sodium Perborate Process

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Product

Resources

About

Ca(OH)₂-mediated activation of peroxymonosulfate for the degradation of bisphenol S

Ca(OH)₂-mediated activation of peroxymonosulfate for the degradation of bisphenol S