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Lead Adsorption on Rice Husk as a Function of pH Control

  • Paulo Scarano Hemsi
  • Diego Diez Garcia
Conference paper
Part of the Environmental Science and Engineering book series (ESE)

Abstract

The use of agro-based waste materials in treatment zones for removal of heavy metals from the aqueous phase by adsorption represents a low-cost and possibly effective remediation alternative. In this study, the adsorption of lead (Pb2+) on a rice-husk residue was tested in different experiments with initial 100 mg Pb2+/L, initial pH values of 3, 5, or 7, and solid:liquid ratio (mass basis) of 1:20. In some experiments pH was allowed to vary, whereas in other experiments pH was kept approximately fixed. For the experiments with variable pH, Pb2+ was most adsorbed (93%) in the test where pH increased from 3 to 5.1, and least adsorbed in the test where pH decreased from 7 to 6.4. The point of zero charge of the rice husk was determined to be pH 4.5. For the experiments with fixed pH, the optimum pH for Pb2+ adsorption (95%) was found to be pH 5, and the test at pH 3 removed 67% of the initial Pb2+. The results allowed to grasp the significant effect pH control plays on Pb2+ adsorption, and the relevance of studying the factors that control pH during Pb2+ adsorption in a field application (in-situ treatment zone).

Keywords

Adsorption Agro-based residues Lead Permeable reactive barriers Rice husk 

Notes

Acknowledgements

This research was based on equipment purchased with grant # 2012/08797-2, Sao Paulo Research Foundation (FAPESP).

References

  1. Drever JI (1997) The Geochemistry of Natural Waters: Surface and Groundwater Environments, 3rd edn. Prentice Hall, Upper Saddle RiverGoogle Scholar
  2. ITRC, Interstate Technology & Regulatory Council (2005) Permeable Reactive Barriers: Lessons Learned/New Directions. Permeable Reactive Barriers Team. Washington, D.C. http://www.itrcweb.org/Documents/PRB-4.pdf
  3. Krishnani KK, Meng X, Christodoulatos C, Boddu VM (2008) Biosorption mechanism of nine different heavy metals onto biomatrix from rice husk. J Hazard Mater 153(3):1222–1234CrossRefGoogle Scholar
  4. Malik DS, Jain CK, Yadav AK (2017) Removal of heavy metals from emerging cellulosic low-cost adsorbents: a review. Appl Water Sci 7(5):2113–2136CrossRefGoogle Scholar
  5. Nakbanpote W, Goodman BA, Thiravetyan P (2007) Copper adsorption on rice husk derived materials studied by EPR and FTIR. Coll Surf A: Physicochem Eng Asp 304(1–3):7–13CrossRefGoogle Scholar
  6. Rangabhashiyam S, Anu N, Giri Nandagopal MS, Selvaraju N (2014) Relevance of isotherm models in biosorption of pollutants by agricultural byproducts. J Environ Chem Eng 2(1):398–414CrossRefGoogle Scholar
  7. Tarley CRT, Arruda MAZ (2004) Biosorption of heavy metals using rice milling byproducts. Characterization and application for removal of metals from aqueous effluents. Chemosphere 54(7):987–995CrossRefGoogle Scholar
  8. U.S. Environmental Protection Agency (1998), Permeable Reactive Barrier Technologies for Contaminant Remediation, EPA/600/R-98/125, Washington, D. CGoogle Scholar
  9. Vieira MGA, Almeida Neto AF, Silva MG, Carneiro CN, Melo Filho AA (2012) Characterization and use of in natura and calcined rice husks for biosorption of heavy metals ions from aqueous effluents. Braz J Chem Eng 29(3):619–633CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Aeronautics Institute of TechnologySao Jose dos CamposBrazil

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