Removal of heavy metal zinc from aqueous solution by the alga Gracilaria corticata

Heidari, Kamal; Jafari, Dariush; Babaei, Nahid; Esfandyari, Morteza

Removal of heavy metal zinc from aqueous solution by the alga Gracilaria corticata

Document Type : Original Research

Authors

K. heidari ¹

D. jafari ²

N. babaei ³

M. Esfandyari ⁴

¹ Master of chemical engineering, Islamic Azad University, Bushehr Branch, Bushehr, Iran

² Assistant professor of chemical engineering, Islamic Azad University, Bushehr Branch, Bushehr, Iran

³ Assistant professor of biotecnology, Islamic Azad University, Bushehr Branch, Bushehr, Iran

⁴ Assistant professor of chemical engineering, University of Bojnord, Bojnord, Iran

Abstract

Research subject:

Zinc is one of the most dangerous organic components in industrial wastewaters, which pollutes the environment as a result of human activities and various industrial operations. In the present study, the adsorbent prepared from Gracilaria Corticata algae was used for the first time to recover and remove heavy metal zinc and equilibrium study of the process were done.

Research approach:

In the current work, the effect of important parameters such as initial pH of solution, adsorbent dosage and contact time were investigated on the adsorption efficiency of the process. Additionally, Langmuir and Freundlich two-parameter adsorption isotherm models were used to model the equilibrium of zinc adsorption.

Main results:

The results showed that according to the calculated correlation coefficient, Freundlich isotherm was better than the Langmuir in fitting the experimental data. The highest point-to-point correlation coefficient for adsorbent percentage was achieved at 3 g/ml adsorbent dosage with contact time of min 360 and pH=7 and the lowest one was at 4 g/ml adsorbent dose with contact time of min PH=360 and 7. However, the highest adsorption rate was observed for the adsorbent dosage of 4 g/ml with contact time of 420 min at pH=9 and the lowest adsorption percentage was achieved at the adsorbent dosage of 2 g/ml with contact time of 300 min and pH=5. The maximum and minimum adsorption percentages were 76.88 mg/g and 49.25 mg/g, respectively

Keywords

Zinc ion

Adsorption

Gracilaria algae

Corticata species

Aqueous solution

Kinetic behavior

Subjects

filtration

1- Barros A.J.M., Prasad S., Leite V.D., Souza A.G., Biosorption Of Heavy Metals In Upflow Sludge Solumns, Bioresource Technology, 98, 1418-1425, 2017.
2- Paulino A.T., Simionato J.I., Garcia J.C., Nozaki J., Characterization Of chitosan And Chitin Produced From Silkworm Crysalides, Carbohydrate Polymers, 64 , 98-103, 2006.
3- Tech E.T., Evaluation Of Wastewater Treatment Contaminated With Formaldehyde By Using Activated Carbon Prepared From Cypress Leaf, Journal of Environmental Treatment Techniques, 2, 23-27,2014.
4- Saeed A., Iqbal M., Bioremoval Of Cadmium From Aqueous Solution By Black Gram Husk (Cicer Arientinum), Water Research, 37, 3472-3480, 2003.
5- Javaid A., Bajwa R., Shafique U., Anwar J., Removal Of Heavy Metals By Adsorption On Pleurotus Ostreatus, Biomass and Bioenergy, 35, 1675-1682,2011.
6- Kucukgulmez A., Celik M., Yanar Y., Sen D., Polat H., Kadak A.E., Physicochemical Characterization Of Chitosan Extracted From Metapenaeus Stebbingi Shells, Food Chemistry, 126, 1144-1148, 2011.
7- Ashraf M.A., Wajid A., Mahmood K., Maah M.J., Yusoff I., Low Cost Biosorbent Banana Peel (Musa Sapientum) For The Removal Of Heavy Metals, Scientific Research And Essays, 6 , 4055-4064, 2011.
8- Patel K.P., Tank S., Patel K.M., Patel P., Removal Of Cadmium And Zinc Ions From Aqueous Solution By Using Two Type Of Husks, APCBEE Procedia, 5, 141-144, 2013.
9- Savari A., Kochenien P., Naser A.M., Falahi M., The Effect Of Heavy Metal On ChlorellA
Vulgaris, Scenedesmus Obliquus And Anabaena Flos-Aquae, 2004.
10- Katsoyiannis I.A., Zouboulis A.I., Removal Of Arsenic From Contaminated Water Sources By Sorption Onto Iron-Oxide-Coated Polymeric Materials, Water Research, 36, 5141-5155,2002.
11- Knorr D., Use Of Chitinous Polymers In Food: A Challenge For Food Research And Development, Food Technology, USA, 1984.
12- Bhainsa K.C., Souza S. D., Removal Of Copper Ions By The Filamentous Fungus, Rhizopus Oryzae From Aqueous Solution, Bioresource Technology, 99, 3829-3835, 2008.