Preparation of rhamnolipid-layered double hydroxide nanocomposite for removing -cresol from water
Rhamnolipid (RL)-modified Mg 3 Al-layered double hydroxide (LDH) was prepared as p -cresol adsorbent by ion exchange (RL-LDH1) and delamination/reassembling (RL-LDH2) method, respectively. The basal spacing of RL-LDH1 ( d 003 = 3.22 nm) and RL-LDH2 ( d 003 = 3.39 nm) was significantly increased co...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2018-02-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1177/0263617416688475 |
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| Summary: | Rhamnolipid (RL)-modified Mg 3 Al-layered double hydroxide (LDH) was prepared as p -cresol adsorbent by ion exchange (RL-LDH1) and delamination/reassembling (RL-LDH2) method, respectively. The basal spacing of RL-LDH1 ( d 003 = 3.22 nm) and RL-LDH2 ( d 003 = 3.39 nm) was significantly increased compared with Mg 3 Al LDH ( d 003 = 0.90 nm) due to the intercalation of RL anions between the LDH layers. The reduced surface area of RL-LDH nanocomposites demonstrated their strong hydrophobic property. The highest adsorption capacity of RL-LDH2 for p -cresol was intimately related to its stacking model of the interlayer hydrophobic moiety and higher RL (organic carbon) content. The linear model well fitted for p -cresol adsorption isotherms, implying a partitioning adsorption process. Along with the effect of temperature on p -cresol adsorption, an adsolubilization mechanism and an exothermic adsorption nature during adsorption process were revealed. |
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| ISSN: | 0263-6174 2048-4038 |