UPM Institutional Repository

Synthesis and characterization of grape seeds biochar and iron nanoparticles-added biochar for removal of cadmium from aqueous solutions


Mohammed, El Erchelee Alaa Jassem (2021) Synthesis and characterization of grape seeds biochar and iron nanoparticles-added biochar for removal of cadmium from aqueous solutions. Masters thesis, Universiti Putra Malaysia.


Due to the degradation of environmental quality, particularly in relation to the rising heavy metal concentrations in the environment, methods for removing these contaminants have been widely studied this study aims to investigate the adsorption method for cadmium removal in an aqueous solution using biomass-derived adsorbents. Grape seeds (GS) were used as biomass precursors to prepare grape seeds biochar (GSB) and to synthesize grape seeds-iron nanoparticles (GS-IONPs) for the purpose of removing cadmium ion (Cd) from aqueous solutions using batch adsorption technique. The GSB was prepared at a percentage yield of 48-50% by carbonization of dry grape seeds particles (0.5 mm) at 400 oC under inert gas (N2). The grape seeds iron oxide nanoparticles were prepared by bio-reduction of ferrous chloride salt, using grape seeds water extract. The opt optimum operating conditions of biosynthesis nanoparticles consist of mixing ferric chloride with grape seed water extract in a 2:1 v/v ratio and solution mixture with pH of 3.8. The feasibility of adsorbents to remove Cd from aqueous solutions was investigated through batch studies using the GSB and GS-IONPs, in addition to the commercial charcoal (CC) as adsorbents. Batch experiments were carried out to study the effects of cadmium initial concentrations in the range of 10-25 mg/l, contact time and solution pH (2-12) at solution temperature (30 oC). Batch adsorption of Cd onto the three adsorbents was fitted to the Langmuir, Freundlich, and Temkin isotherm models. It was found that the adsorption of cadmium onto GSB, GS-IONPs and CC followed the Langmuir isotherm model according to the R2 values (0.999 ≥ R2 ≥ 0.970), in addition to the 1/n values, which are less than one. The maximum adsorption capacities were found to be 10.63, 16.3 and 11.12 mg/g onto GSB, GS-IONPs and CC, respectively. Please add a conclusion here.

Download File

[img] Text

Download (2MB)

Additional Metadata

Item Type: Thesis (Masters)
Subject: Adsorption
Subject: Iron oxides
Subject: Cadmium - Toxicology
Call Number: FS 2022 3
Chairman Supervisor: Syaizwan Zahmir Zulkifli, PhD
Divisions: Faculty of Science
Depositing User: Ms. Rohana Alias
Date Deposited: 26 Jul 2023 02:11
Last Modified: 26 Jul 2023 02:11
URI: http://psasir.upm.edu.my/id/eprint/104308
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item