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231225s2018 xx |||||o 00| ||eng c |
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|a 10.2166/wst.2017.552
|2 doi
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|a pubmed25n0936.xml
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|a (NLM)29431701
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Zhang, Zhenchao
|e verfasserin
|4 aut
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|a Combined treatment of hydroxypropyl guar gum in oilfield fracturing wastewater by coagulation and the UV/H2O2/ferrioxalate complexes process
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 15.08.2018
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|a Date Revised 07.12.2022
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|a published: Print
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|a Citation Status MEDLINE
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|a Hydroxypropyl guar gum is considered to be a main component of oilfield fracturing wastewater (OFW). This work is intended to optimize the experimental conditions for the maximum oxidative degradation of hydroxypropyl guar gum by the coagulation and UV/H2O2/ferrioxalate complexes process. Optimal reaction conditions were proposed based on the chemical oxygen demand (COD) removal efficiency and UV_vis spectra analysis. The overall removal efficiency of COD reached 83.8% for a dilution ratio of raw wastewater of 1:2, pH of 4 and FeCl3 loading of 1,000 mg/L in the coagulation process; the dosage of H2O2 (30%,v/v) was 0.6% (v/v) and added in three steps, the n(H2O2)/n(Fe2+) was 2:1, n(Fe2+)/n(C2O42-) was 3:1 and pH was 4 in the UV/H2O2/ferrioxalate complexes process; pH was adjusted to 8.5-9 by NaOH and then cationic polyacrylamide (CPAM) of 2 mg/L was added in the neutralization and flocculation process. The decrease in COD during the coagulation process reduced the required H2O2 dosage and improved efficiency in the subsequent UV/H2O2/ferrioxalate complexes process. Furthermore, COD removal efficiency significantly increased by more than 13.4% with the introduction of oxalate compared with UV/Fenton. The UV_vis spectra analysis results indicated that the coagulation and UV/H2O2/ferrioxalate complexes process could efficiently remove the hydroxypropyl guar gum dissolved in OFW. An optimal combination of these parameters produced treated wastewater that met the GB8978-1996 Integrated Wastewater Discharge Standard level III emission standard
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|a Journal Article
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|a Acrylic Resins
|2 NLM
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|a Industrial Waste
|2 NLM
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|a Oxalates
|2 NLM
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|a Polysaccharides
|2 NLM
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|a Waste Water
|2 NLM
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|a Water Pollutants, Chemical
|2 NLM
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|a hydroxypropyl guar
|2 NLM
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|a ferrioxalate
|2 NLM
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|a 15321-61-6
|2 NLM
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|a polyacrylamide
|2 NLM
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|a 9003-05-8
|2 NLM
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|a Hydrogen Peroxide
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|a BBX060AN9V
|2 NLM
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|i Enthalten in
|t Water science and technology : a journal of the International Association on Water Pollution Research
|d 1986
|g 77(2018), 3-4 vom: 29. Feb., Seite 565-575
|w (DE-627)NLM098149431
|x 0273-1223
|7 nnas
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| 773 |
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|g volume:77
|g year:2018
|g number:3-4
|g day:29
|g month:02
|g pages:565-575
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|u http://dx.doi.org/10.2166/wst.2017.552
|3 Volltext
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