Bioaugmented soil aquifer treatment for P-nitrophenol removal in wastewater unique for cold regions

Zhang, Xi; Yang, Yuesuo; Lü, Ying; Wen, Yujuan; Li, P.P.; Zhang, Ge

doi:10.1016/j.watres.2018.08.004

Cited by 24 publications

(18 citation statements)

References 52 publications

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“…2,3 The U.S. Environmental Protection Agency classifies 4-NP as a priority pollutant due its toxic effect and the damage that it causes to the central nervous system, liver and kidneys in animals and humans. 4 Thus, in order to eliminate this recalcitrant pollutant, 5 different processes have been applied including photocatalytic degradation, 6,7 microbial degradation 8,9 and catalytic degradation. 10,11 However, an interesting methodology for the treatment of 4-NP involves its reduction towards the selective formation of 4-aminophenol (4-AP), a chemical used widely in photography, the production of dyes, and the agricultural and pharmaceutical industries.…”

Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic reduction of 4‐nitrophenol over Ir/CeO₂ photocatalysts under UV irradiation

Castañeda

Alvarado

Martínez

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Photoreduction of 4-nitrophenol (4-NP) photocatalytically to 4-aminophenol (4-AP) is considered a promising treatment of this recalcitrant pollutant. 4-aminophenol is widely applied as an intermediate in the pharmaceutical and agricultural industries. In this work, iridium/cerium dioxide (Ir/CeO 2 ) photocatalysts with different Ir contents (0.5, 1.0 and 2.0 wt%) were studied in the photoreduction of 4-NP using Na 2 SO 3 as hole scavengers under UV irradiation. In order to identify their physicochemical properties, the materials were studied by several techniques and photoactivity was monitored by UV-visible spectroscopy. RESULTS:The characterization results provided evidence that the modification of CeO 2 by impregnation of Ir causes a decrease in CeO 2 textural properties and its band gap energy. The photocatalytic reduction of 4-nitrophenol was enhanced by 26.1% using Ir/CeO 2 1.0 wt% in comparison with CeO 2 support. The phrase is related with the comparison between the photocatalytic behavior of Ir/CeO 2 1.0 wt% photocatalyst in regard the results evidenced with CeO 2 unmodified. An effect of the metal loading over photoactivity was observed and the optimal Ir content was 1.0 wt%. A reduction of 84% was obtained using 1.0 wt%Ir/CeO 2 , whereas for higher metal loading (2.0 wt%) 4-NP reduction decreased by 72%. CONCLUSION:The enhancement in the photocatalytic behavior of the Ir/CeO 2 series could be related to the presence of Ir + and Ir 0 species evidenced by X-ray photoelectron spectroscopy (XPS), thus, Ir + species could favor the adsorption of the pollutant and Ir 0 particles could act as trap of the photogenerated electrons that are responsible for reduction of the nitrocompound. The decrease in photoactivity when 2.0 wt% Ir/CeO 2 was used as photocatalyst could be associated with partial blockage of the surface active sites by increasing amounts of metal.

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Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic reduction of 4‐nitrophenol over Ir/CeO₂ photocatalysts under UV irradiation

Castañeda

Alvarado

Martínez

et al. 2019

J of Chemical Tech & Biotech

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“…27 p-Nitrophenol was a toxic and recalcitrant organic pollutant that has posed a significant threat to surface water. 28 Strain X1 T could degrade those substituted phenols completely in 24 h.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

Minute-Speed Biodegradation of Organophosphorus Insecticides by Cupriavidus nantongensis X1^T

Shi

Fang

Qin

et al. 2019

J. Agric. Food Chem.

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Organophosphorus insecticides (OPs) have been widely used to control agricultural pests, which has raised concerns about OP residues in crops and the environment. In this study, we investigated the degradation kinetics and pathways of 8 OPs by Cupriavidus nantongensis X1T and identified the enzyme via gene cloning and in vitro assays. The degradation half-life of methyl parathion, triazophos, and phoxim was only 5, 9, and 43 min, respectively. It was 46 fold faster than that of triazophos by Bacillus sp. TAP-1, a well-studied triazophos-degrader. Strain X1T completely degraded not only chlorpyrifos, methyl parathion, parathion, fenitrothion, triazophos, and phoxim at 50 mg/L within 48 h but also the phenolic metabolites. This was the fastest degradation of OPs by bacterial whole cells reported thus far. The OPs were first hydrolyzed by an OP hydrolase encoded by the opdB gene in strain X1T, followed by further degradation of the metabolites. The crude enzyme maintained a full activity.

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“…It was decided that at the beginning, most parameters that characterize wastewater quality was monitored and then the most significant parameters in assessing the degree of quality improvement were selected for monitoring throughout the study. To verify the reliability of the results obtained, samples from the outflow were analysed for all parameters [19,22]. For Hydrogen Ion Concentration (pH), the column processes were started with one day wetting process trailed by one day drying process.…”

Section: Physical and Chemical Parametersmentioning

confidence: 99%

“…Hence, column studies were conducted because of this easiness and cost effective, has been carried out in a choice of settings, with a fixed temperature [18][19][20]. Mostly, column studies were conducted and compared with different selections of sites and operational factors separately, namely soil type or depth of ponding, but little work has been achieved to scientifically test a choice of factors on congestion of porous media [21,22]. This method is quite useful for water management systems, mainly in semi-arid regions.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Wastewater Pollutants Retaining for a Soil Aquifer Treatment using Batch Column Experiments

Raji

Packialakshmi²

2022

Civ Eng J

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In this study, the Secondary Treated Waste-Water (STWW) to infiltrate through the soil matrix, hence eliminating the contaminants in the effluent. For this study, three types of soil, such as loamy sand, fine sand, and clayey soil, were subjected to two cycles of wetting and drying to assess the type of soil that removes the maximum contaminants under which cycle. At diverse locations, soil samples were collected and examined to determine the soil types. Likewise, STWW was collected from Chennai Metropolitan Water Supply and Sewerage Board (CMWSSB) and Perungudi Sewage Treatment Plant (PSTP) to illustrate the quality of water before Soil Aquifer Treatment (SAT). About 1.5 m in height and 8 mm in diameter of fabricated acrylic material columns are used for the soil aquifer treatment efficiency studies. Water quality parameters, namely pH, TDS, and turbidity, were monitored throughout the study. All the organic compounds present in water were reduced to a higher level only in the fine sand in the one-day wetting/drying cycle. pH was reduced from 8.55 to 7.5, TDS was reduced from 1580 mg/l to 850 mg/l, and Turbidity was reduced from 7.24 to 4.04 NTU. This proposed method is to minimize the amount of water pollution from the environment. It is an effective way to manage aquifer recharge (MAR). SAT is the easiest method, aquifer and/or soil-based treatment systems improve the effluent quality of wastewater by removing the trace elements in the aquifer during the recharge of groundwater. It is likewise attractive for technologically advanced as well as emerging countries, and it is supple enough to allow adaptation to home-grown requirements by uniting it with predictable natural or bringing about water and technologies of wastewater treatment. Doi: 10.28991/CEJ-2022-08-07-011 Full Text: PDF

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Bioaugmented soil aquifer treatment for P-nitrophenol removal in wastewater unique for cold regions

Cited by 24 publications

References 52 publications

Enhanced photocatalytic reduction of 4‐nitrophenol over Ir/CeO₂ photocatalysts under UV irradiation

Enhanced photocatalytic reduction of 4‐nitrophenol over Ir/CeO₂ photocatalysts under UV irradiation

Minute-Speed Biodegradation of Organophosphorus Insecticides by Cupriavidus nantongensis X1^T

Assessing the Wastewater Pollutants Retaining for a Soil Aquifer Treatment using Batch Column Experiments

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Bioaugmented soil aquifer treatment for P-nitrophenol removal in wastewater unique for cold regions

Cited by 24 publications

References 52 publications

Enhanced photocatalytic reduction of 4‐nitrophenol over Ir/CeO2 photocatalysts under UV irradiation

Enhanced photocatalytic reduction of 4‐nitrophenol over Ir/CeO2 photocatalysts under UV irradiation

Minute-Speed Biodegradation of Organophosphorus Insecticides by Cupriavidus nantongensis X1T

Assessing the Wastewater Pollutants Retaining for a Soil Aquifer Treatment using Batch Column Experiments

Contact Info

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Enhanced photocatalytic reduction of 4‐nitrophenol over Ir/CeO₂ photocatalysts under UV irradiation

Enhanced photocatalytic reduction of 4‐nitrophenol over Ir/CeO₂ photocatalysts under UV irradiation

Minute-Speed Biodegradation of Organophosphorus Insecticides by Cupriavidus nantongensis X1^T