Preparation and Characterization of New CrFeO3-Carbon Composite Using Environmentally Friendly Methods to Remove Organic Dye Pollutants from Aqueous Solutions

Globally, environmental pollution is an important issue. Various pollutants present in water resources, such as bacteria, heavy-metal ions, and organic pollutants, cause serious problems to the environment, animals, plants, and human health. Among the water resources, pollutants, dyestuff, which is discharged from dyeing, textile, and other industrial processes, is an important class of pollutants. Removing these dye pollutants from water resources and wastewater is vital and important due to their toxicity. In this work, a CrFeO3-carbon nanotube (CNT) adsorbent was synthesized using environmentally friendly methods. The synthesized CrFeO3-CNT adsorbent was characterized stoichiometrically, spectroscopically, and morphologically. The synthesized CrFeO3-CNT adsorbent was tested for the removal of two dyes: Methyl violet 2B (MV) and Azocarmine G2 (AC) from an aqueous solution. Crushing CrFeO3 composite with multi-walled fullerene CNT to prepare CrFeO3-CNT adsorbent improved the adsorption performance of free multi-walled fullerene CNT towards MV dye by 30% and towards AC dye by 33.3%.

Download Full-text

First organic–inorganic hybrid nanomaterial constructed from a Keggin-type polyoxometallate and a copper-dithiocarbamate complex: Sonochemical synthesis, crystal structure and its adsorption performance for organic dye pollutants

Polyhedron ◽

10.1016/j.poly.2017.01.036 ◽

2017 ◽

Vol 126 ◽

pp. 227-238 ◽

Cited By ~ 12

Author(s):

Saeed Farhadi ◽

Michal Dusek ◽

Firouzeh Siadatnasab ◽

Vaclav Eigner ◽

Abbasali Mokhtari andani

Keyword(s):

Crystal Structure ◽

Organic Dye ◽

Sonochemical Synthesis ◽

Inorganic Hybrid ◽

Hybrid Nanomaterial ◽

Adsorption Performance ◽

Dithiocarbamate Complex ◽

Keggin Type ◽

Dye Pollutants

Download Full-text

Removal of Methyl Violet 2B from Aqueous Solution Using Casuarina equisetifolia Needle

ISRN Environmental Chemistry ◽

10.1155/2013/619819 ◽

2013 ◽

Vol 2013 ◽

pp. 1-8 ◽

Cited By ~ 27

Author(s):

Muhammad Khairud Dahri ◽

Muhammad Raziq Rahimi Kooh ◽

Linda B. L. Lim

Keyword(s):

Experimental Data ◽

Contact Time ◽

Methyl Violet ◽

Freundlich Isotherm ◽

Isotherm Models ◽

Maximum Adsorption Capacity ◽

Casuarina Equisetifolia ◽

Dye Pollutants ◽

Methyl Violet 2B ◽

Before And After

One of the major contaminants of water bodies is dye pollutants that come from textile, paper, and leather industries. In this study, Casuarina equisetifolia needle (CEN) is used to remove methyl violet 2B (MV) from aqueous solutions. Batch experiments were done to investigate the contact time, effect of pH, initial dye concentrations, and temperature. Langmuir and Freundlich isotherm models were used to describe the interaction between the adsorbate and adsorbent. The sorption mechanism was described using Lagergren 1st order, pseudo 2nd order, and Weber-Morris intraparticle diffusion models. FTIR spectroscopy was used to analyze the functional groups of CEN before and after sorption with MV. Optimal conditions were found to be at room temperature with 2 h contact time and no pH adjustment was needed. Experimental data was best fitted onto Langmuir model with maximum adsorption capacity of 164.99 mg/g, while pseudo 2nd order best described the experimental data for the kinetics study. Thermodynamic parameters such as change in Gibbs free energy (), enthalpy (), and entropy () were also investigated.

Download Full-text