Keywords
How to Cite
Abstract
The main objective of this work was to use the okra powder modified with citric acid as biosorbent for the removal of Cr(VI) from aqueous solutions. Samples of Cr(VI) solution were prepared by diluting the 100 ppm solution diluted from the 1000 ppm stock solution prepared with K2Cr2O7. The determination of Cr(VI) was performed spectrophotometrically by the method of complexation with 1,5-diphenylcarbazide, measuring the absorbance at a 540 nm wavelength. The experiments were conducted at 25 ± 1 °C; 2, 5, 7 and 8 initial pH; 10-240 minutes contact time and 0.05 g of adsorbent. The Freundlich and Langmuir models were used to fit the experimental data. The Freundlich model provided R2=0.9599, indicating adsorption on heterogeneous conditions. Analysis of fluorescence of X-rays, SEM and FTIR were used to prove the okra powder efficiency in the removal of Cr(VI) from aqueous solutions.
References
Brum MC. Remoção de cromo hexavalente de água por adsorção em argilas modificadas porsurfatantescatiônicos. Rio de Janeiro 146f. Tese (doutorado em engenharia metalúrgica e de materiais). Universidade federal do Rio de Janeiro, UFRJ 2010.
Pina FDS. Tratamento de águas contaminadas com crómio(VI) por biossorção em algas marinhas. Dissertação (mestrado em Engenharia do Ambiente) Faculdade de Engenharia da Universidade de Porto, FEUP 2011.
Bhattacharyya KG, Sen Gupta S. Adsorption of chromium (VI) from water by clays.Indust Eng Chem Res 2006; 45(21): 7232-40. http://dx.doi.org/10.1021/ie060586j
Heller L, Pádua VL. Abastecimento de água para consumo humano. Belo Horizonte, MG: UFMG 2006.
Benvindo da Luz A, Sampaio JA, Almeida SLM. Tratamento de minérios, rev. e ampliada. Rio de Janeiro: CETEM/MCT 2002.
Dakiky M, Khamis M, Manassra A, Mer’eb M. Selective adsorption of chromium VI in industrial wastewater using low-cost abundantly available adsorbents. Adv Environm Res 2002; 6: 533-40. http://dx.doi.org/10.1016/S1093-0191(01)00079-X
Gupta VK, Ali L. Removal of lead and chromium from wastewater using bagasse fly ash-a sugar industry waste. J Coll Interf Sci 2004; 2: 321-28. http://dx.doi.org/10.1016/j.jcis.2003.11.007
Gupta VK, Rastogi A. Sorption and desorption studies of chromium(VI) from nonviable cyanobacterium Nostoc muscorum biomass. J Hazardous Mater 2008; 154: 347-54. http://dx.doi.org/10.1016/j.jhazmat.2007.10.032
Gupta VK, Rastogi A. Biosorption of lead from aqueous solutions by green algae Spirogyra species: kinetics and equilibrium studies. J Hazardous Mater 2008; 1: 407-14. http://dx.doi.org/10.1016/j.jhazmat.2007.07.028
Gupta VK, Rastogi A. Biosorption of lead(II) from aqueous solutions by non-living algal biomass Oedogonium sp. and Nostoc sp.—a comparative study. J Hazardous Mater 2008; 152: 407-14. http://dx.doi.org/10.1016/j.jhazmat.2007.07.028
Altun T, Pehlivan E. Removal of Cr(VI) from aqueous solutions by modified walnut shells. Food Chem 2012; 132(2): 693-700. http://dx.doi.org/10.1016/j.foodchem.2011.10.099
Pehlivan E, Pehlivan E, Kahraman HT. Hexavalent chromium removal by Osage Orange. Food Chem 2012; 133: 1478-84. http://dx.doi.org/10.1016/j.foodchem.2012.02.037
Lee SH, Park C-H. Biosorption of Heavy Metal Ions by Brown Seaweeds from Southern Coast of Korea, Biotechnol. Bioproc Eng 2012; 17: 853-61. http://dx.doi.org/10.1007/s12257-011-0578-5
Rajeshwari M, Pushpa A, Priya SP, Sandhya GR, Pavithra GM. Continuous Biosorption of Cadmium by Moringa oleiferain a Packed Column. J Biotechnol Bioproc Eng 2013; 18(2): 321-25. http://dx.doi.org/10.1007/s12257-012-0424-4
Abreu-Lima GJ. Uso de polímero natural do quiabo como auxiliar de floculação e filtração em tratamento de água e esgoto. Dissertação de mestrado. Universidade do Estado do Rio de Janeiro 2007.
Amaya-Farfan J, Silva VSN, Souza AS, Pacheco MTB. Caracterização química parcial da mucilagem do quiabo (Hibiscus esculentus L.) In: Simpósio Latino-americano de Ciência de Alimentos. Campinas. Anais. Campinas: Unicamp 2003.
Jesus E, Cruz PV, Pacífico JA, Silva AS. Removal of Turbidity, Suspended Solids and Ions of Fe from Aqueous Solution using Okra Powder by Coagulation-Flocculation Process. Am J Water Resour 2013; 1(3): 20-24.
Morita T, Assumpção RM. Manual de Soluções, Reagentes e Solventes. 2 ed., São Paulo: Edgard Blucher 2007.
Agarwal M, Srinivasan R, Mishira A. Study on flocculation efficiency of okra gum in sewage waste water. Macromol Mater Eng 2011; 286: 560-63. http://dx.doi.org/10.1002/1439-2054(20010901)286:9<560::AID-MAME560>3.0.CO;2-B
Agarwal M, Rajani S, Mishra A, Rai J. Utilization of okra gum for treatment of tannery effluent. Int J Polymeric Mater 2003; 52: 1049-57. http://dx.doi.org/10.1080/714975900
Auerswald H, Schwarz D, Kornelson C, Krumbein A, Brueckner B. Sensory analysis, sugar and acid content of tomato at different EC values of the nutrient solution. Sci Horticulture 1999; 82: 227-42. http://dx.doi.org/10.1016/S0304-4238(99)00058-8
Arapitsas P. Identification and Quantification of Polyphenolic Compounds from Okra Seeds and Skins. Food Chemy 2008; 110: 1041-45. http://dx.doi.org/10.1016/j.foodchem.2008.03.014
Mota WF, Finger FL, Casali VWD. Olericultura: Melhoramento Genético do Quiabeiro. Viçosa: UFV, Departamento de Fitotecnia 2000; p. 144.
Mota WF, Finger FL, Silva DJH, Corrêa PC, Firme LP, Neves LLM. Caracterização físico-química de frutos de quatro cultivares de quiabo. Horticultura Brasileira 2005; 23: 722-25. http://dx.doi.org/10.1590/S0102-05362005000300006
Gopalakrishnan N, Kaimal TNB, Lakshminarayana G. Fatty acid changes in Hibiscus esculentustissues during growth. Phytochemisrry 1982; 21(3): 565-68. http://dx.doi.org/10.1016/0031-9422(82)83141-5
Shukla D, Vankar PS. Efficient biosorption of chromium(VI) ion by dry Araucaria leaves.Environm Sci Pollut Res Int 2012; 19(6): 2321-28. http://dx.doi.org/10.1007/s11356-012-0741-3
Bernardo LD, Dantas ADB. Métodos e técnicas de tratamento de água. 2th, São Carlos, SP: Rima 2005.
Owlad M, Aroua MK, Daud WA, Saeid B. Removal of Hexavalent Chromium-Contaminated Water and Wastewater: A Review. Water Air Soil Pollution 2009; 200: 59-77. http://dx.doi.org/10.1007/s11270-008-9893-7
Feng NC, Guo XY, Liang S. Adsorption study of copper (II) by chemically modified orange peel. J Hazardous Mater 2009; 164: 1286-92. http://dx.doi.org/10.1016/j.jhazmat.2008.09.096
Santhana A, Kumar K, Kalidhasan S, Rajesh V, Rajesh N. Application of Cellulose-Clay Composite Biosorbent toward the Effective Adsorption and Removal of Chromium from Industrial Wastewater. Indust Eng Chem Res 2012; 51: 58-69. http://dx.doi.org/10.1021/ie201349h
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.