TY - JOUR
T1 - Nutraceutical industrial chillies stalk waste as a new adsorbent for the removal of acid violet 49 from water and textile industrial effluent: Adsorption isotherms and kinetic models
AU - Yakuth, Syida Aameera
AU - Taqui, Syed Noeman
AU - Syed, Usman Taqui
AU - Syed, Akheel Ahmed
PY - 2019/7
Y1 - 2019/7
N2 - First-ever study on the adsorption of Acid Violet 49 (AV49) dye, onto nutraceutical industrial chillies stalk waste (NICSW) is reported. A two-level fractional factorial experiment design and analysis of variance (ANOVA) were adopted to study how initial concentration of the dye, adsorbent dosage, duration of adsorption process, speed of agitation, pH of the reaction mixture and temperature affect the adsorption process. The adsorption capacity of NICSW at equilibrium was analyzed using Langmuir, Freundlich, Jovanovic, Temkin, Dubinin–Radushkevich and Harkins–Jura isotherms. The pseudo-first-order and pseudo-second-order models were considered for kinetic studies. Maximum adsorption capacity of 45.40 mg/g was obtained by Langmuir isotherm as against the experimental value of 29.00 mg/g, with correlation coefficient of 0.979 at near neutral pH. NICSW was characterized by Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller, scanning electron microscope and energy dispersive X-ray spectroscopy. Elemental (C, H, N, S) analyses of the adsorbent were conducted. Along with thermodynamic parameter evaluation such as Gibb’s free energy, enthalpy and entropy and results of the surface characterization showed that the dye adsorption onto the biosorbent has taken place such as a physical process. These results proved that NICSW is a fast and effective adsorbent to remove AV49 from water and textile industrial effluent.
AB - First-ever study on the adsorption of Acid Violet 49 (AV49) dye, onto nutraceutical industrial chillies stalk waste (NICSW) is reported. A two-level fractional factorial experiment design and analysis of variance (ANOVA) were adopted to study how initial concentration of the dye, adsorbent dosage, duration of adsorption process, speed of agitation, pH of the reaction mixture and temperature affect the adsorption process. The adsorption capacity of NICSW at equilibrium was analyzed using Langmuir, Freundlich, Jovanovic, Temkin, Dubinin–Radushkevich and Harkins–Jura isotherms. The pseudo-first-order and pseudo-second-order models were considered for kinetic studies. Maximum adsorption capacity of 45.40 mg/g was obtained by Langmuir isotherm as against the experimental value of 29.00 mg/g, with correlation coefficient of 0.979 at near neutral pH. NICSW was characterized by Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller, scanning electron microscope and energy dispersive X-ray spectroscopy. Elemental (C, H, N, S) analyses of the adsorbent were conducted. Along with thermodynamic parameter evaluation such as Gibb’s free energy, enthalpy and entropy and results of the surface characterization showed that the dye adsorption onto the biosorbent has taken place such as a physical process. These results proved that NICSW is a fast and effective adsorbent to remove AV49 from water and textile industrial effluent.
KW - Acid Violet 49 dye
KW - Adsorption isotherms
KW - Biosorption
KW - Chillies stalk waste
KW - Kinetics
KW - Nutraceutical industrial waste
KW - Textile industrial effluent
UR - http://www.scopus.com/inward/record.url?scp=85067995586&partnerID=8YFLogxK
U2 - 10.5004/dwt.2019.23997
DO - 10.5004/dwt.2019.23997
M3 - Article
AN - SCOPUS:85067995586
VL - 155
SP - 94
EP - 112
JO - Desalination And Water Treatment
JF - Desalination And Water Treatment
SN - 1944-3994
ER -