Specific UV–vis absorbance changes of humic acid in the presence of clay particles during photocatalytic oxidation

Kavurmaci, Sibel Şen; Bekbölet, Miray

doi:10.1080/19443994.2013.795878

Cited by 12 publications

(4 citation statements)

References 12 publications

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“…Therefore, the suitability of low-cost and renewable adsorbents, particularly clay-based derivatives has drawn great attention for the remediation of toxic pollutants [9]. Of major interest, montmorillonite has been proposed to be a good candidate [10], evidence from the intercalation of water pollutants by the modification of d(0 0 1) reflection [11][12][13][14][15][16].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

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Feasibility of montmorillonite-assisted adsorption process for the effective treatment of organo-pesticides

Shattar

Zakaria

Foo

2015

Desalination and Water Treatment

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A B S T R A C TOver the years, the emergence of pesticides practice has prevailed to be the most intricate environmental turmoil amongst the scientific community. Specifically, pesticides constitute an accumulative, persistent and detrimental impact towards the survival of flora, fauna and environmental matrix. This has inspired a developing research with a variety of treatment technologies. Adsorption is recognized as the most efficient and promising approach, due to the ease of operation, simplicity of design, insensitivity to the toxic substances and superior capability for removing a broad range of pollutants. Its diverse applications, however, are retarded by the high cost of adsorbents and difficulties associated with regeneration. Montmorillonite and its derivatives, a unique group of under-utilized clay-based minerals has been proposed to be a suitable candidate for the treatment of contaminated wastewater. It plays a key role as the natural scavenger of pesticides, due to the abundantly availability, large specific surface area and high adsorptive and ion exchange properties. This paper describes the origin, physical, chemical and physicochemical properties of natural montmorillonite. The preparation procedure, reusability, commercial product and economical evaluation are highlighted. The specific classification, environmental and health implication of organo-pesticide are discussed. The revolution of montmorillonite-assisted adsorption process for the remediation of organo-pesticide was summarized. Additionally, the characterizations, surface chemistry and mechanism investigation are outlined.

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Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…The shift in the intercalated montmorillonites was related to the local environment of the interlayer space. Results indicated the 1-3 ppm upfield chemical shift for the end-methyl (δC16 ) and methylene (δC15 , δC[2][3][4][5][6][7][8][9][10][11][12][13][14] …”

mentioning

confidence: 99%

Feasibility of montmorillonite-assisted adsorption process for the effective treatment of organo-pesticides

Shattar

Zakaria

Foo

2015

Desalination and Water Treatment

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“…The concentration of supernatant of humic acid solution was estimated at a wavelength of 254 nm using an Evolution 201 UV-vis spectrophotometer to determine the loading efficiency. 35,36 To study the in vitro slow-release properties of humic acid from chitosan/yeast hybrid hydrogel beads, the humic acid-loaded chitosan/yeast hybrid hydrogel beads were suspended in 100 mL distilled water with different pH values (pH 4.5-10.5), which was agitated at 120 rpm at 30 1C. At predetermined time intervals, 3 mL of release medium was withdrawn, separated by centrifugation and assayed spectrophotometrically at 254 nm.…”

Section: Humic Acid Loading and In Vitro Slow-release Propertiesmentioning

confidence: 99%

Enhanced mechanical stability and sensitive swelling performance of chitosan/yeast hybrid hydrogel beads

et al. 2016

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“…The phenomenon revealed that the molecular structure degree and condensation degree of organic matter in groundwater increased after MNB and CB aeration. In addition, the speci c absorbance of E254, E280 and S239-400 can be used to explain the degradation pathway of DOM in groundwater (Gregory et al, 1997;Guo et al, 2011;Kavurmaci and Bekbolet, 2014). E254 is a distinctive feature of electronic spectra of aromatic compound.…”

Section: Uv-vis Absorbance Spectra Of Groundwatermentioning

confidence: 99%

A comparative study of removal efficiency of organic contaminant in landfill leachate-contaminated groundwater under micro-nano-bubble and common bubble aeration

Bai

Liu

Zhan

et al. 2022

Environ Sci Pollut Res

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Land ll leachate contaminated groundwater is widespread all over the world. In order to study the organic contaminant removal e ciency of land ll leachate contaminated groundwater under oxygen micro-nanobubble (MNB) aeration, a series of lab-scale experiments of oxygen MNB aeration as well as common bubble (CB) aeration were conducted. On the one hand, the difference of mass transfer, microbial activity enhancement and contaminant removal e ciency between MNB and CB aeration were estimated. On the other hand, the composition variations of dissolved organic matter (DOM) in groundwater treated by MNB or CB aeration were characterized by ultraviolet-visible (UV-VIS) absorption spectrum and uorescence excitation-emission matrix (EEM). The test results showed that the oxygen utilization e ciency and volumetric oxygen transfer coe cient of MNB aeration were 10 and 50 times that of oxygen CB aeration, respectively. On the 30th day after MNB aeration, the dehydrogenase activity (DHA) of groundwater increased by 101.25%. Compared with CB aeration, the chemical oxygen demand (COD), 5-day biochemical oxygen demand (BOD 5 ) and ammonia nitrogen removal e ciency under MNB aeration increased by 29.72%, 13.43% and 138.59%, respectively. With the biodegradation effect of MNB aeration, a large number of protein-like and soluble microbial by-product substances were degraded, and humic and fulvic acid-like substances were degraded to a certain level. Oxygen MNB aeration played a chemical oxidation effect while enhancing the biodegradation of groundwater, and it was an energy-e cient land ll leachate contaminated groundwater treatment method.

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Specific UV–vis absorbance changes of humic acid in the presence of clay particles during photocatalytic oxidation

Cited by 12 publications

References 12 publications

Feasibility of montmorillonite-assisted adsorption process for the effective treatment of organo-pesticides

Feasibility of montmorillonite-assisted adsorption process for the effective treatment of organo-pesticides

Enhanced mechanical stability and sensitive swelling performance of chitosan/yeast hybrid hydrogel beads

A comparative study of removal efficiency of organic contaminant in landfill leachate-contaminated groundwater under micro-nano-bubble and common bubble aeration

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