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231226s2024 xx |||||o 00| ||eng c |
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|a 10.1080/09593330.2022.2119609
|2 doi
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|a pubmed25n1152.xml
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|a (DE-627)NLM345697669
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|a (NLM)36052504
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Zheng, Chunli
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Removal of Pb(II) by lignin-sodium alginate composite in a fixed-bed column
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|c 2024
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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 15.01.2024
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|a Date Revised 15.01.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a A kind of adsorbent (Hydrogel-I) derived from sodium alginate and modified alkaline lignin (MAL) has been proved to possess a good adsorption performance for Pb(II)-loaded wastewater based on batch experiments. However, practical removal of Pb(II)-loaded-wastewater is a continuous and dynamic process. Herein, Hydrogel-I was further evaluated by packing it into a fixed-bed column. The breakthrough curves were established under different inflow rates (0.159-0.318 L/min), inflow directions (down-inflow mode and top-inflow mode), initial concentrations (5-20 mg/L) of Pb(II), and bed depths (20-60 cm). The results indicated that the slower inflow rate (0.159 L/min), down-inflow mode, lower initial concentration (5 mg/L), and higher bed depth (60 cm) prolonged breakthrough times (tb) and saturation times (ts). Compared to the top-inflow mode, the down-inflow mode guaranteed enough contact between Hydrogel-I and Pb(II). The values of adsorption capacity at tb, ts, and the removal efficiency under the down-inflow mode were higher than that under top-inflow mode by 2.33, 0.78, and 0.07 times, respectively. Hydrogel-I beads exhibited better adsorption performance than other adsorbents by comparing the rate constant (kAB) and the adsorption capacity (N0). The kAB and N0 of Hydrogel-I beads were calculated to be 0.0034 L/(mg·min-1) and 678 mg/L. Hydrogel-I beads showed good regeneration ability in a three-adsorption-desorption cycle. Meanwhile, FT-IR analysis showed that the groups of -NH/-NH2, C=S, and C-S were proved to be the adsorption sites. This study could prove valuable insight into the practical application of Hydrogel-I for dynamic removal of Pb(II) in an inflow-through column
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|a Journal Article
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|a Adsorption
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|a Breakthrough curves
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|a Fixed-bed column
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|a Pb(II)
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|a Regeneration
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|a Wastewater
|2 NLM
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|a Lead
|2 NLM
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| 650 |
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|a 2P299V784P
|2 NLM
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| 650 |
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7 |
|a Lignin
|2 NLM
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| 650 |
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|a 9005-53-2
|2 NLM
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| 650 |
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7 |
|a Water Pollutants, Chemical
|2 NLM
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| 650 |
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|a Alginates
|2 NLM
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| 650 |
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|a Hydrogels
|2 NLM
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| 700 |
1 |
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|a Yong, Yingying
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Qiaorui
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lin, Zishen
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Yujie
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhang, Youwen
|e verfasserin
|4 aut
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| 700 |
1 |
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|a He, Chi
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Environmental technology
|d 1993
|g 45(2024), 4 vom: 02. Jan., Seite 681-694
|w (DE-627)NLM098202545
|x 1479-487X
|7 nnas
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| 773 |
1 |
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|g volume:45
|g year:2024
|g number:4
|g day:02
|g month:01
|g pages:681-694
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|u http://dx.doi.org/10.1080/09593330.2022.2119609
|3 Volltext
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