Synthesis of diatomite/Fe3O4/Teff straw activated carbon composite adsorbent for Cr(VI) removal from wastewater

Shewatatek, Sintayehu; Gonfa, Girma; Mekuria, Sintayehu; Tessema, Belete; Kezembayeva, Gulmira; Ghosh, Kalyan Sundar; Mushtaq, Muhammad; Diyanatizadeh, Mohammad Hadi; IŞINKARALAR, Kaan; Hosseini-Bandegharaei, Ahmad

doi:10.1016/j.rechem.2025.102486

Synthesis of diatomite/Fe3O4/Teff straw activated carbon composite adsorbent for Cr(VI) removal from wastewater

Yazarlar (10)
Sintayehu Shewatatek Addis Ababa Science And Technology University, Etiyopya
Girma Gonfa Addis Ababa Science And Technology University, Etiyopya
Sintayehu Mekuria Addis Ababa Science And Technology University, Etiyopya
Belete Tessema Addis Ababa Science And Technology University, Etiyopya
Gulmira Kezembayeva Satbayev University, Kazakistan
Kalyan Sundar Ghosh National Institute Of Technology Hamirpur, Hindistan
Muhammad Mushtaq Government College University Lahore, Pakistan
Mohammad Hadi Diyanatizadeh Zarmehr Tehran Oxin Co., İran
Doç. Dr. Kaan IŞINKARALAR Kurum Bilgileri Mühendislik ve Mimarlık Fakültesi Çevre Mühendisliği Çevre Teknolojileri Özgeçmiş Sayfası İletişim Bilgileri: (366)280-1000 Kastamonu Üniversitesi, Türkiye
Ahmad Hosseini-Bandegharaei Semnan University, İran

Devamını Göster

Özet

Heavy metal pollution, particularly chromium (Cr), poses a significant environmental challenge. This study addresses this issue by developing a novel composite adsorbent consisting of diatomite (DE), Fe3O4, and an activated carbon from teff straw (TSAC). The nanocomposite was characterized, exploiting FT-IR, BET, SEM, and XRD analyses, revealing a substantial BET surface area of 347.45 m²/g. Response surface methodology (RSM) with central composite design (CCD) was exploited to optimize adsorption parameters, including pH, adsorbent dose, initial Cr(VI) concentration, and adsorption time. Optimal conditions yielded a removal efficiency of 93.28 % at pH 4, an adsorbent dose of 0.024 g/100 mL, an initial Cr(VI) level of 15 mg/L, and an adsorption time of 60 min. The results showed that the Freundlich and Langmuir isotherm models, along with Toth model, best matched the data. This implies that both monolayer and heterogeneous surface adsorptions are the main mechanism, with a maximal sorption capacity of 131 mg/g and followed the pseudo-second-order kinetic model. Thermodynamic analyses uncovered the spontaneous and endothermic nature of the Cr (VI) adsorption by DE/Fe3O4/TSAC. The composite's recyclability was demonstrated over five cycles, maintaining significant removal efficiency. Such findings highlight the potentials of the DE/Fe3O4/TSAC composite for effective Cr (VI) removal from water, offering a promising solution to mitigate chromium pollution.

Anahtar Kelimeler

Makale Türü	Özgün Makale
Makale Alt Türü	ESCI dergilerinde yayınlanan tam makale
Dergi Adı	Results in Chemistry
Dergi ISSN	2211-7156 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler	ESCI
Makale Dili	İngilizce
Basım Tarihi	07-2025
Cilt No	16
Sayı	1
Sayfalar	102486 / 0
Doi Numarası	10.1016/j.rechem.2025.102486
Makale Linki	https://doi.org/10.1016/j.rechem.2025.102486

BM Sürdürülebilir Kalkınma Amaçları

Atıf Sayıları
WoS	2
SCOPUS	2
Google Scholar	2

Synthesis of diatomite/Fe3O4/Teff straw activated carbon composite adsorbent for Cr(VI) removal from wastewater

Akademisyenler > Kaan IŞINKARALAR > Yayın Detayı

Synthesis of diatomite/Fe3O4/Teff straw activated carbon composite adsorbent for Cr(VI) removal from wastewater

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