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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1002/wer.1277
|2 doi
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|a pubmed25n1011.xml
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|a (DE-627)NLM303411155
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|a (NLM)31737966
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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 |
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|a Zhao, Ziyi
|e verfasserin
|4 aut
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|a Synthesis of a novel Fe-Mn binary oxide-modified lava adsorbent and its effect on ammonium removal from aqueous solutions
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 22.05.2020
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|a Date Revised 22.05.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2019 Water Environment Federation.
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|a Ammonium is strongly related to eutrophication and a key control of eutrophication in aquatic systems, especially in agricultural runoff. In this study, a novel Fe-Mn binary oxide-modified lava (FMML) granular adsorbent was synthesized for ammonium removal from aqueous solutions by co-precipitation method. The kinetic data were described by pseudo-second-order kinetic model well and intraparticle diffusion had effects on ammonium adsorption. For pH between 4.0 and 10.0, the adsorption efficiency was >80%, and its optimum was recorded at pH 7.0. FMML exhibited strong ammonium adsorption selectivity under the single presence of cations like Na+ , K+ , Ca2+ , and Mg2+ . The optimum adsorbent dose and particle size were 4 g/L and 3-5 mm, respectively, for an aqueous solution containing 10 mg/L of ammonium under normal conditions (298 K and pH 7.0). Furthermore, the adsorption process was endothermic, following both the Langmuir (R2 > 0.98) and Freundlich (R2 > 0.96) models. Compared with other adsorbents, the FMML can be prepared following a simpler protocol. After 30 times of adsorption-regeneration cycle, the FMML also had a relatively high ammonium adsorption capacity; hence, we see it as a prospective adsorbent for ammonium adsorption from aqueous solutions. PRACTITIONER POINTS: Fe-Mn binary oxide-modified lava with Fe/Mn ratio 3:1 was prepared using co-precipitation method. Adsorption maximum of modified lava was 20.8 mg/g (298 K and pH 7.0). Adsorption was sensitive to changes in adsorbent dose, particle size, and pH. Inorganic cations decreased ammonium adsorption in order of Na+ > K+ > Ca2+ > Mg2+ . Mechanisms for ammonium removal by FMML include diffusion, electrostatic attraction, oxidation, and complexation reaction
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|a Journal Article
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|a Fe-Mn binary oxide
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|a adsorption mechanism
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|a ammonium adsorption
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|a aqueous solutions
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|a modified lava
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|a Ammonium Compounds
|2 NLM
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|a Oxides
|2 NLM
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|a Solutions
|2 NLM
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|a He, Shuang
|e verfasserin
|4 aut
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|a Li, Fayong
|e verfasserin
|4 aut
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|a Jin, Yingbing
|e verfasserin
|4 aut
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|a Khan, Sangar
|e verfasserin
|4 aut
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|a Liu, Feng
|e verfasserin
|4 aut
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|a Liang, Xinqiang
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Water environment research : a research publication of the Water Environment Federation
|d 1998
|g 92(2020), 6 vom: 18. Juni, Seite 850-864
|w (DE-627)NLM098214292
|x 1554-7531
|7 nnas
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| 773 |
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|g volume:92
|g year:2020
|g number:6
|g day:18
|g month:06
|g pages:850-864
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|u http://dx.doi.org/10.1002/wer.1277
|3 Volltext
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