Abstract

With beer production waste brewer's grains (BSG) as the raw material, through polyethylenimine (PEI) modified and glutaraldehyde (GA) cross-linking process for preparing the modified brewer's grains biosorbents. The simulation of Cr (VI) wastewater as treatment object, through the optimization of synthesis conditions of Cr (VI), the optimal synthesis process was obtained. The results showed, 4 g BSG and 100 mL 4% PEI methanol solution were placed in 250 mL conical flask at room temperature, shaking for 24 h. After the mixture,shifted to 200 mL l.5% GA solution directly, magnetic stirring for half an hour, the modified results of brewer’s grain was best. Under the optimal conditions, the average of adsorption rate was 98.82% and adsorption capacity was 45.31 mg/g. The modified brewer's grains of amine surfactant modified is a promising treatment of chromium wastewater biological materials.

Keywords:

Cr(VI), Modified BSG, orthogonal experiment, PEI, synthesis conditions,

References

1. Chen, Y.N., 2009. Study on deeply purifying arsenic and cadmium from waters by biosorbent spent grains. Ph.D. Thesis, Central South University, Wuhan.
   
2. Deng, S. and Y.P. Ting, 2005. Polyethylenimine-modified fungal biomass as a high-capacity biosorbent for Cr(VI) anions: Sorption capacity and uptake mechanisms. Environ. Sci. Technol., 39(21): 8490-8496.
   CrossRef    PMid:16294892    
3. Deng, S., G. Yu, S. Xie, Q. Yu, J. Huang, Y. Kuwaki and M. Iseki, 2008. Enhanced adsorption of arsenate on the aminated fibers: Sorption behavior and uptake mechanism. Langmuir, 24(19): 10961-10967.
   CrossRef    PMid:18771297    
4. Elangovan, R., L. Philip and K. Chandraraj, 2008. Biosorption of chromium species by aquatic weeds: Kinetics and mechanism studies. J. Hazard Mater., 152(1): 100-112.
   CrossRef    PMid:17689012    
5. Elmas, A., G.H. Jajamovich, X. Wang and M.S. Samoilov, 2013. Designing DNA barcodes orthogonal in melting temperature by simulated annealing optimization. Nucleic Acid Ther., 23(2): 140-151.
   CrossRef    PMid:23557118    
6. Ertugay, N. and Y.K. Bayhan, 2008. Biosorption of Cr (VI) from aqueous solutions by biomass of Agaricus bisporus. J. Hazard Mater., 154(1): 432-439.
   CrossRef    PMid:18078714    
7. Guo, H., F. Peng, L. Ma, Z. Jiang and X. Liu, 2011. Hydrolysis technology optimization of phorbol esters by orthogonal experiment. China J. Chinese Mater. Med., 36(4): 446-449.
   CrossRef    
8. Li, H., Z. Li, T. Liu, X. Xiao, Z. Peng and L. Deng, 2008. A novel technology for biosorption and recovery hexavalent chromium in wastewater by bio-functional magnetic beads. Bioresource Technol., 99(14): 6271-6279.
   CrossRef    PMid:18221868    
9. Li, J., Q. Lin and X. Zhang, 2010. Mechanism of electron transfer in the bioadsorption of hexavalent chromium within Leersia hexandra Swartz granules by X-ray photoelectron spectroscopy. J. Hazard Mater., 182(1): 598-602.
   CrossRef    PMid:20638174    
10. Li, X.G., X.L. Ma, J. Sun and M.R. Huang, 2009. Powerful reactive sorption of silver(I) and mercury(II) onto poly(o-phenylenediamine) microparticles. Langmuir, 25(3): 1675-1684.
    CrossRef    PMid:19132885    
11. Liu, B., 2012. Study on adsorption of heavy metal ions from water by novel biosorbents. Ph.D. Thesis, Southwestern University, Chongqing.
    
12. Liu, R.X. and H.Z. Zhang, 2011. Research progress of Cr(VI) containing wastewater treatment. Environ. Sci. Technol., 24: 94-97.
    
13. Mohan, D. and C.U. Jr. Pittman, 2006. Activated carbons and low cost adsorbents for remediation of tri- and hexavalent chromium from water. J. Hazard. Mater, 137(2): 762-811.
    CrossRef    PMid:16904258    
14. Nakano, Y., K. Takeshita and T. Tsutsumi, 2001. Adsorption mechanism of hexavalent chromium by redox within condensed-tannin gel. Water Res., 35(2): 496-500.
    CrossRef    
15. Park, D., Y.S. Yun and J.M. Park, 2005. Studies on hexavalent chromium biosorption by chemically-treated biomass of Ecklonia sp. Chemosphere, 60(10): 1356-1364.
    CrossRef    PMid:16054904    
16. Park, D., Y.S. Yun, C.K. Ahn and J.M. Park, 2007. Kinetics of the reduction of hexavalent chromium with the brown seaweed Ecklonia biomass. Chemosphere, 66(5): 939-946.
    CrossRef    PMid:16837023    
17. Park, D., S.R. Lim, Y.S. Yun and J.M. Park, 2008. Development of a new Cr(VI)-biosorbent from agricultural biowaste. Bioresource Technol., 99(18): 8810-8818.
    CrossRef    PMid:18511265    
18. Qian, R., 1999. Biostatistics. Higher Education Press, Beijing, pp: 126-129.
    PMid:10681871    
19. Shen, S. and J. Xu, 2010. Research on adsorption of hexavalent chromium in water onto grapefruit husk powder. Chin. J. Environ. Eng., 4(8): 1841-1845.
    
20. Singh, K.K., R. Rastogi and S.H. Hasan, 2005. Removal of Cr(VI) from wastewater using rice bran. J. Colloid Interf. Sci., 290(1): 61-68.
    CrossRef    PMid:16122543    
21. Sud, D., G. Mahajan and M.P. Kaur, 2008. Agricultural waste material as potential adsorbent for sequestering heavy metal ions for aqueous solutions: A review. Bioresource Technol., 99(1): 6017-6027.
    CrossRef    PMid:18280151    
22. Wang, X.S., Z.Z. Li and C. Sun, 2008. Removal of Cr(VI) from aqueous solutions by low-cost biosorbents: Marine macroalgae and agricultural by-products. J. Hazard. Mater., 153(3): 1176-1184.
    CrossRef    PMid:17997216    
23. Yang, L. and J.P. Chen, 2008. Biosorption of hexavalent chromium onto raw and chemically modified Sargassum sp. Bioresource Technol., 99(2): 297-307.
    CrossRef    PMid:17336517    

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