adsorption of malachite green dye from aqueous solutions using roots of azolla filiculoides

Authors

zohreh khoshraftar

science and research branch, islamic azad university, tehran, iran ali shamel

department of chemistry, ardabil branch, islamic azad university, ardabil, iran.

abstract

pollution of water resources by various pollutants is nowadays a global environmental issue. among the different type of water pollutants, dye represents a major polluting group. in this study, azolla filiculides roots have been used for adsorption of malachite green (mg), a cationic dyed from aqueous solution. in this study, effects of operating parameters such as initial concentration of dye (5-30 mg/l), contact time (5-120 min), adsorbent dosage (0.05- 0.5) and ph (6-11) in the batch system investigated. the adsorption process data successfully were described by langmuir, freundlich, temkin and bet isotherms. the kinetics of the adsorption data were analyzed using 3 kinetic models such as pseudo second- order, intra-particle diffusion and elovich to understand the adsorption behavior of malachite green onto azolla filiculoides roots. the result showed the removal of mg was increased by increasing contact time and adsorbent dose, and ph. according to the analysis of the different kinetic models for adsorption of mg on azolla filiculoides roots follows of pseudo second – order kinetic. the temkin model described the adsorption result very well. this study indicated can be used as an effective and inexpensive adsorbent to removal of malachite green from aqueous solution. the positive value of change in enthalpy shows that the adsorption mg dye onto azolla filiculoides roots is endothermic. furthermore, the negative value of indicated that the adsorption mg dye was thermodynamically spontaneous.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Adsorption of Malachite Green Dye from Aqueous Solutions Using Roots of Azolla Filiculoides

Pollution of water resources by various pollutants is nowadays a global environmental issue. Among the different type of water pollutants, dye represents a major polluting group. In this study, Azolla filiculides roots have been used for adsorption of Malachite Green (MG), a cationic dyed from aqueous solution. In this study, effects of operating parameters such as initial concentration of dye ...

full text

Photocatalytic Removal of Malachite Green Dye from Aqueous Solutions Using Halloysite–TiO2 Nanocomposite

 Background and purpose: Malachite green is one of the most widely used dyes in various industries, aquaculture, and fungicides. The residues have adverse effects on environmental and human health and should be removed from the effluent before discharging to the environment. The purpose of this study was to investigate the efficiency of photocatalytic process using halloysite-titanium dioxide n...

full text

Application of Azolla Filiculoides biomass for Acid blue 15 dye (AB15) Removal from aqueous solutions

Background: one of the most important environmental pollutants is industrial wastewaters. Discharging of colorful industrial effluents to receptive waters can lead to eutrification and it has the carcinogenic and mutagenic properties. Therefore, the aim of this study is evaluation of Acid blue 15 dye removal by dried Azolla from aqueous solution. Material and methods: The Azolla biomass was dri...

full text

Adsorption kinetics and thermodynamics of Malachite Green from aqueous solutions onto expanded Graphite nanosheets

Expanded graphite nanosheets (EG-nanosheets) were used for adsorption of Malachite Green (MG) from aqueous solution. The influences of dye concentrations, absorbent dosage, pH values and the temperatures on the adsorption were investigated as well. The dye adsorption experiments were carried out by utilizing batch procedure. EG-nanosheets were initially characterized by scanning electron micros...

full text

Adsorption kinetics and thermodynamics of Malachite Green from aqueous solutions onto expanded Graphite nanosheets

Expanded graphite nanosheets (EG-nanosheets) were used for adsorption of Malachite Green (MG) from aqueous solution. The influences of dye concentrations, absorbent dosage, pH values and the temperatures on the adsorption were investigated as well. The dye adsorption experiments were carried out by utilizing batch procedure. EG-nanosheets were initially characterized by scanning electron micros...

full text

Phytodegradation potential of bisphenolA from aqueous solution by Azolla Filiculoides

Many organic hazardous pollutants such as bisphenolA (BPA) which are toxic and not easily biodegradable can concerns for environmental pollution worldwide. The objective of this study was to examine whether Azolla Filiculoides is able to remove BPA from aqueous solutions. In this study, the Azolla with different biomass (0.3, 0.6, 0.9, 1.2 g) has been cultured in solution that was contained 5, ...

full text

My Resources

Save resource for easier access later


Journal title:
journal of physical and theoretical chemistry

جلد ۱۳، شماره ۳، صفحات ۲۳۷-۲۵۲

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023