Thermally activated adsorbent over chemically modified Carica papaya tree adsorbents for removal of chromium from tannery wastewater
Küçük Resim Yok
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This work investigated on the adsorption efficacies of contrasting Carica papaya tree adsorbents in removing chromium from the tannery wastewater. The convenience of thermally activated adsorbent was evaluated over chemically modified adsorbents developed employing ZnCl2, KOH, and HNO3 individually followed by calcination (600 °C) for 3 h. Chromium removal efficiencies obtained for ZnCl2, KOH, and HNO3 modified and thermally modified Carica papaya tree adsorbents were 71.33 %, 73.58 %, 76.25 %, and 99.89 %, respectively. Chromium adsorption on different Carica papaya tree adsorbents was assessed by FTIR, EDX, TEM, and BET surface area analysis. The maximum chromium removal efficiency of thermally modified adsorbent was 99.88 % at 0.25-g/25 mL of adsorbent dose for a 20 min stirring time. Both the Pseudo-second-order equation and Freundlich isotherm showed the best fitting with determination coefficients R2 = 0.9997 and R2 = 0.9999, respectively. Freundlich isotherm and Pseudo-second-order kinetic revealed the adsorption reaction as a chemisorption reaction with stronger interaction between adsorbent and chromium. © 2023 Elsevier Ltd
Açıklama
Anahtar Kelimeler
Carica papaya tree, Chromium, Efficiency, Tannery, Wastewater
Kaynak
Bioresource Technology Reports
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
25
