PMID- 35194713
OWN - NLM
STAT- MEDLINE
DCOM- 20220708
LR  - 20220708
IS  - 1614-7499 (Electronic)
IS  - 0944-1344 (Linking)
VI  - 29
IP  - 32
DP  - 2022 Jul
TI  - Nitrate adsorption onto surface-modified red mud in batch and fixed-bed column 
      systems: equilibrium, kinetic, and thermodynamic studies.
PG  - 48438-48452
LID - 10.1007/s11356-022-19311-x [doi]
AB  - This research aimed to develop a novel composite as a low-cost adsorbent for the 
      removal of nitrate ion from aqueous solutions. The characterization of this 
      composite (composition of red mud with dimethyldioctadecylammonium bromide 
      (DDAB)) was performed by XRF, XRD, FTIR, and BET analyses. The most influential 
      variables on nitrate adsorption, including contact time, solution acidity, 
      adsorbent amount, and temperature were studied. The maximum amount of nitrate 
      adsorbed onto the prepared adsorbent was obtained at pH 5.5 and contact time 
      30 min. The heterogeneous adsorption occurred during the uptake of nitrate. The 
      results of kinetic study revealed that intra-particle diffusion was the major 
      limitation for nitrate adsorption rate. The values of thermodynamic parameters 
      illustrate the non-spontaneous, associative, and exothermic adsorption process. 
      Increasing the temperature enhances the tendency of the process to 
      non-spontaneously. Research on fixed-bed column has been done under different 
      initial nitrate concentrations. The adsorption capacity of nitrate was increased 
      with an increase in the initial concentration of nitrate. The results of column 
      data were successfully explained using the Thomas and Yoon-Nelson models.
CI  - (c) 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, 
      part of Springer Nature.
FAU - Allahkarami, Ebrahim
AU  - Allahkarami E
AD  - Department of Mining Engineering, Amirkabir University of Technology, Tehran, 
      Iran.
FAU - Azadmehr, Amirreza
AU  - Azadmehr A
AD  - Department of Mining Engineering, Amirkabir University of Technology, Tehran, 
      Iran. A_azadmehr@aut.ac.ir.
FAU - Noroozi, Fahimeh
AU  - Noroozi F
AD  - Department of Chemistry, Semnan University, Semnan, Iran.
FAU - Farrokhi, Shayan
AU  - Farrokhi S
AD  - Department of Mining Engineering, Amirkabir University of Technology, Tehran, 
      Iran.
FAU - Sillanpaa, Mika
AU  - Sillanpaa M
AD  - Department of Chemical Engineering, School of Mining, Metallurgy and Chemical 
      Engineering, University of Johannesburg, P. O. Box 17011, Doornfontein, 2028, 
      South Africa.
AD  - Faculty of Science and Technology, School of Applied Physics, University 
      Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia.
AD  - Chemistry Department, College of Science, King Saud University, Riyadh, 11451, 
      Saudi Arabia.
AD  - School of Chemistry, Shoolini University, Solan, Himachal Pradesh, 173229, India.
LA  - eng
PT  - Journal Article
DEP - 20220222
PL  - Germany
TA  - Environ Sci Pollut Res Int
JT  - Environmental science and pollution research international
JID - 9441769
RN  - 0 (Nitrates)
RN  - 0 (Water Pollutants, Chemical)
SB  - IM
MH  - Adsorption
MH  - Hydrogen-Ion Concentration
MH  - Kinetics
MH  - *Nitrates/analysis
MH  - Thermodynamics
MH  - *Water Pollutants, Chemical/analysis
OTO - NOTNLM
OT  - Adsorption
OT  - DDAB
OT  - Fixed-bed column
OT  - Nitrate ion
OT  - Surface-modified red mud
EDAT- 2022/02/24 06:00
MHDA- 2022/07/09 06:00
CRDT- 2022/02/23 05:35
PHST- 2021/12/08 00:00 [received]
PHST- 2022/02/15 00:00 [accepted]
PHST- 2022/02/24 06:00 [pubmed]
PHST- 2022/07/09 06:00 [medline]
PHST- 2022/02/23 05:35 [entrez]
AID - 10.1007/s11356-022-19311-x [pii]
AID - 10.1007/s11356-022-19311-x [doi]
PST - ppublish
SO  - Environ Sci Pollut Res Int. 2022 Jul;29(32):48438-48452. doi: 
      10.1007/s11356-022-19311-x. Epub 2022 Feb 22.