Scalable fabrication of chitosan-grafted silica bionanocomposite for the superb sequestration of anionic dye from aqueou
- PDF / 1,029,738 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 29 Downloads / 197 Views
ORIGINAL ARTICLE
Scalable fabrication of chitosan-grafted silica bionanocomposite for the superb sequestration of anionic dye from aqueous solution Priya Saharan 1 & Vinit Kumar 2 & Ashok K. Sharma 1 Jose H. Santos 4 & Siti Nurul Azian Zakaria 4
&
H. N. M. Ekramul Mahmud 3 & Norhabibah Binti Mohamad 3 &
Received: 26 July 2020 / Accepted: 29 September 2020 # Qatar University and Springer Nature Switzerland AG 2020
Abstract The aim of the current research is to fabricate chitosan-grafted silica (Chit/SiO2) bionanocomposite for the easy sequestration of anionic dye (Food Green 3) from aqueous solution. The as-prepared nanocomposite material was characterized using powder Xray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy and transmission electron microscopy. The adsorption characteristics of Chit/SiO2 nanocomposite were systematically studied as a function of pH, adsorbent dose and initial concentration with respect to contact time. The results revealed that an amount of 0.01 g of Chit/SiO2 showed maximum removal efficacy of the adsorbed dye (30 mg/L) at pH 3. Adsorption equilibrium verified that the experimental statics fitted well with the Langmuir isotherm model with adsorption capacity of 476.19 mg/L. The rate kinetics is well described by pseudosecond-order adsorption model. Moreover, Chit/SiO2 nanocomposite could be successfully regenerated and reused without any major loss in adsorption efficacy. Keywords Chitosan . Silica . Nanomaterials . Food green dye . Adsorption/desorption . Wastewater remediation
1 Introduction With the rapid industrialization and due to unrestrained emission of pollutants from chemicals factories, water pollution has emerged as a serious problem [1, 2]. Among all of these pollutants, organic dyes are a major source of water contamination as they are widely used in textile, food processing, cosmetics and pharmaceutical units [3]. Being persistent and non-degradable, they are classified as highly noxious, mutagenic and even carcinogenic. These properties can lead to devastating * Ashok K. Sharma [email protected] 1
Thin Film Laboratory, Department of Chemistry, Deenbandhu Chhotu Ram University of Science & Technology, Murthal, Haryana, India
2
Central Instrumentation Laboratory, Deenbandhu Chhotu Ram University of Science & Technology, Murthal, Haryana, India
3
Department of Chemistry, University of Malaya, Kuala Lumpur, Malaysia
4
Department of Chemistry, Universiti Brunei Darussalam, Bandar Seri Begawan, Brunei
effects on biotic environment [4]. To safeguard water resources, the effective exclusion and proper treatment of organic contaminants from water become essential. Several technologies are used for the elimination of these toxic pollutants from wastewater such as coagulation, membrane filtration, adsorption and advanced oxidation process. Out of these, adsorption is considered to be an eco-friendly technique to treat coloured wastewater owing to its ease of operation, effectiveness, economic viability and no treatment req
Data Loading...
