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20231226043343.0 |
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231226s2022 xx |||||o 00| ||eng c |
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|a 10.1002/wer.10811
|2 doi
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|a pubmed24n1165.xml
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|a (DE-627)NLM349742995
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|a (NLM)36461752
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Chang Chien, Shui-Wen
|e verfasserin
|4 aut
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| 245 |
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|a Application of δ-MnO2 and biochar materials in an arsenic-contaminated groundwater
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|c 2022
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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
|b cr
|2 rdacarrier
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|a Date Completed 06.12.2022
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|a Date Revised 06.12.2022
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|a published: Print
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|a Citation Status MEDLINE
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|a © 2022 Water Environment Federation.
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|a Two activated biochar materials, peanut char (δ-MnO2 /A-PC) and corn char (δ-MnO2 /A-CC), were used to treat an arsenic solution containing 97.5% As(III) and 2.5% As(V). After reacting with δ-MnO2 /A-PC for 24 h, 18.8% of As(III) and 35.4% of As(V) remained in the solution, revealing that some As(III) was oxidized to As(V) and the other was removed by adsorption. However, δ-MnO2 /A-CC caused the solution to retain 15.6% of As(III) and 41.7% of As(V) under the same conditions, indicating that δ-MnO2 /A-CC had higher oxidation for arsenic species than δ-MnO2 /A-CC. Adsorption capacities for δ-MnO2 /A-PC and δ-MnO2 /A-CC to arsenic were 1.50 and 1.53 mg/g in a solution with 0.5 ppm As(III), respectively. After coating with δ-MnO2 , the proportion of mesopore surface areas of δ-MnO2 /A-CC increased from 33.3% to 79.0%, but their mesopore volumes increased from 67.6% to 89.4%. Fourier-transform infrared spectroscopy and X-ray diffraction analyses demonstrated that δ-MnO2 was coated onto the surfaces of the biochars. The 600°C-ACC had a higher specific surface area, 221 m2 /g, than the δ-600°C-APC, 81.5 m2 /g; δ-MnO2 /A-CC could attach more Mn (38.2%) than δ-MnO2 /A-PC (27.8%). The elemental analysis revealed that δ-MnO2 /A-PC and δ-MnO2 /A-CC had similar carbon contents of 26.2%. PRACTITIONER POINTS: The δ-MnO2 /biochar adsorbent can oxidize As(III) into As(V) in the groundwater. δ-MnO2 /biochar adsorbed large amounts of As(III) and As(V). Adsorbent that contains more δ-MnO2 has a higher oxidation capacity. The δ-MnO2 /biochar made from corn stalks could combine with more δ-MnO2
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|a Journal Article
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|a adsorption
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|a agricultural waste
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|a arsenic
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|a biochar
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|a groundwater
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|a manganese dioxide
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| 650 |
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|a Arsenic
|2 NLM
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| 650 |
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|a N712M78A8G
|2 NLM
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| 650 |
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|a biochar
|2 NLM
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| 650 |
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|a Manganese Compounds
|2 NLM
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| 650 |
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|a Oxides
|2 NLM
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| 700 |
1 |
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|a Weng, Chun-Ming
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chou, Jen-Shen
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Cheng-Chung
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Water environment research : a research publication of the Water Environment Federation
|d 1998
|g 94(2022), 12 vom: 19. Dez., Seite e10811
|w (DE-627)NLM098214292
|x 1554-7531
|7 nnns
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| 773 |
1 |
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|g volume:94
|g year:2022
|g number:12
|g day:19
|g month:12
|g pages:e10811
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| 856 |
4 |
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|u http://dx.doi.org/10.1002/wer.10811
|3 Volltext
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|d 94
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