PMID- 29649730
OWN - NLM
STAT- MEDLINE
DCOM- 20181031
LR  - 20181031
IS  - 1095-8630 (Electronic)
IS  - 0301-4797 (Linking)
VI  - 217
DP  - 2018 Jul 1
TI  - Rapid and high-performance adsorptive removal of hazardous acridine orange from 
      aqueous environment using Abelmoschus esculentus seed powder: Single- and 
      multi-parameter optimization studies.
PG  - 573-591
LID - S0301-4797(18)30375-X [pii]
LID - 10.1016/j.jenvman.2018.03.137 [doi]
AB  - In this research, the performance of naturally abundant lignocellulosic 
      by-product, Abelmoschus esculentus, and its processed seed powder referred as 
      AESP, as a potential biosorbent for the removal of acridine orange (AO) from the 
      aqueous environment was examined. The AESP biosorbent was characterized by field 
      emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) analysis, 
      diffuse reflectance spectroscopy (DRS), Fourier transform infrared (FTIR) and 
      pH(ZPC) analyses. The average size of the biosorbent according to particle size 
      distribution analysis was found to be  approximately 132 mum. The batch adsorption experiments 
      were conducted by altering the parameters such as contact time, solution pH, 
      biosorbent dosage, initial dye concentration, stirring speed and temperature. 
      Sorption of cationic AO dye onto AESP was found to be rapid, and the equilibrium 
      condition reached within 30 min. The isotherms (Langmuir, Freundlich, 
      Redlich-Peterson and Sips), kinetic models (pseudo-first order, pseudo-second 
      order, Elovich, intra-particle diffusion, Bangham and modified-Freundlich models) 
      and thermodynamic parameters were also evaluated. High values of determination 
      coefficients (R(2)) and minimal values of non-linear error functions (i.e. HYBRD, 
      RMSE, MPSD, ARE, APE and chi(2)) indicated that experimental data were best fitted 
      with Sips isotherm and pseudo-second order kinetic model. Accordingly, the 
      maximum loading capacity of AESP was found to be 259.4, 284.3 and 346.5 mg/g for 
      the temperatures of 15, 30 and 45  degrees C, respectively. The thermodynamic parameters 
      showed that the adsorption of AO onto the AESP surface was an endothermic and 
      spontaneous process. Besides these, the central composite experimental design 
      (CCD) superimposed with response surface methodology (RSM) modeling was also 
      employed to investigate the effect of four significant parameters (solution pH, 
      contact time, initial AO concentration and AESP dosage) and their 
      interaction-term effects on the adsorption capacity of AESP and to formulate the 
      mathematical model for the experimental data using multi-variate statistical 
      analysis. Maximum dye uptake capacity under the optimum conditions of variables 
      (pH 8.96, contact time 32.06 min, initial dye concentration 867.71 mg/L and AESP 
      dosage 1.89 g/L) was 312.1 mg/g at temperature 30  degrees C, and it was found to be very 
      close to the experimentally determined values (313.4 +/- 0.057 mg/g). The promising 
      reusability potential of AESP using 0.1 M HCl, implied that, the lignocellulosic 
      biosorbent AESP might be helpful for the appropriate designing of the 
      environmental-friendly purification systems.
CI  - Copyright (c) 2018 Elsevier Ltd. All rights reserved.
FAU - Nayak, Ashish Kumar
AU  - Nayak AK
AD  - Civil Engineering Department, Indian Institute of Technology Kharagpur, West 
      Bengal, 721302, India.
FAU - Pal, Anjali
AU  - Pal A
AD  - Civil Engineering Department, Indian Institute of Technology Kharagpur, West 
      Bengal, 721302, India. Electronic address: anjalipal@civil.iitkgp.ac.in.
LA  - eng
PT  - Journal Article
DEP - 20180409
PL  - England
TA  - J Environ Manage
JT  - Journal of environmental management
JID - 0401664
RN  - 0 (Water Pollutants, Chemical)
RN  - F30N4O6XVV (Acridine Orange)
SB  - IM
MH  - Abelmoschus
MH  - Acridine Orange/chemistry/*isolation & purification
MH  - Adsorption
MH  - Hydrogen-Ion Concentration
MH  - Kinetics
MH  - Spectroscopy, Fourier Transform Infrared
MH  - Thermodynamics
MH  - Water Pollutants, Chemical/chemistry/*isolation & purification
OTO - NOTNLM
OT  - Abelmoschus esculentus
OT  - Acridine orange
OT  - Adsorption
OT  - Central composite design
OT  - Response surface methodology
OT  - Sips isotherm
EDAT- 2018/04/13 06:00
MHDA- 2018/11/01 06:00
CRDT- 2018/04/13 06:00
PHST- 2017/12/01 00:00 [received]
PHST- 2018/03/07 00:00 [revised]
PHST- 2018/03/31 00:00 [accepted]
PHST- 2018/04/13 06:00 [pubmed]
PHST- 2018/11/01 06:00 [medline]
PHST- 2018/04/13 06:00 [entrez]
AID - S0301-4797(18)30375-X [pii]
AID - 10.1016/j.jenvman.2018.03.137 [doi]
PST - ppublish
SO  - J Environ Manage. 2018 Jul 1;217:573-591. doi: 10.1016/j.jenvman.2018.03.137. 
      Epub 2018 Apr 9.