Adsorption of As(V) from Water over a Hydroxyl-Alumina Modified Paddy Husk Ash Surface and Its Sludge Immobilization
Arsenic (As) is considered as one of the most hazardous elements found in the groundwater. It is present in water in both arsenate (As(V)) and arsenite (As(III)) forms. On exposure for a considerable length of time to water having As concentration above the maximum permissible limit of 10 μg/L, there is a serious threat of developing various health problems including cancer. There is frequent reporting about the development of different newer methods for the removal of arsenic from water. In this present approach, a low-cost product namely modified paddy husk ash (PHA) was used as an adsorbent for the adsorption of arsenic from water. The adsorbent is important from the point of its easy availability in the tropical paddy producing countries. For improved removal efficiency and disposal of spent adsorbent, the surface of the PHA was activated with an aluminum oligomeric solution called as hydroxyl-alumina. To understand the process, various techniques such as XRD, SEM–EDS, particle size determination, and zeta potential measurements were used and the effects like variation of adsorbent dose, pH, initial arsenic concentration, and contact time were studied. The Freundlich adsorption isotherm and pseudo-second-order kinetic models were found to be the best fitted adsorption isotherm and kinetic data models respectively thereby confirming the adsorption as a multilayer chemisorption process. Finally, the issue of disposal of the spent sludge through the successful formation of cement clinkers was studied.
KeywordsPHA Hydroxyl-alumina As(V) adsorption Sludge immobilization Cement clinker
The authors are grateful to the Director, CSIR-NEIST, Jorhat, for allowing to publish the paper. The authors are also grateful to AcSIR for PhD registration and CSC-0408 for providing the facility of SEM analysis.
This work received funding from DST under DST Project GPP-0296.
- Garelick, H., Jones, H., Dybowska, A., & Valsami-Jones, E. (2008). Arsenic pollution sources. Reviews of Environmental Contamination, 197, 17–60.Google Scholar
- Gogoi, C., Saikia, J., Sarmah, S., Sinha, D., & Goswamee, R. L. (2018). Removal of fluoride from water by locally available sand modified with a coating of iron oxides. Water, Air, & Soil Pollution, 229(118) 1–16.Google Scholar
- Goswamee, R. L., & Poellmann, H. (1998). XRD study of thermal stability of hydroxyl-aluminium chloride. Indian Journal of Chemistry, 37A, 561–563.Google Scholar
- Huang, C. P., & Fu, P. L. K. (1984). Treatment of arsenic (V) -containing water by the activated carbon process. Journal - Water Pollution Control Federation, 56, 233–242.Google Scholar
- Indian standards for drinking water, second revision of IS 10500 (2004).Google Scholar
- Jiang, J. Q., Ashekuzzaman, S. M., Hargreaves, J. S. J., McFarlane, A. R., Badruzzaman, A. B. M., & Tarek, M. H. (2015). Removal of arsenic (III) from groundwater applying a reusable Mg-Fe-Cl layered double hydroxide. Journal of Chemical Technology and Biotechnology, 90, 1160–1166.CrossRefGoogle Scholar
- Kiping, M.D., Lenihan, J., Fletcher, W.W., (Eds.), (1997) Arsenic. The Chemical Environment, Environment and Man, 6, 93–110.Google Scholar
- Luqman, M., Javed, M. M., Yasar, A., Ahmad, J., & Khan, A. (2013). An overview of sustainable techniques used for arsenic removal from drinking water in rural areas of the Indo-Pak subcontinent. Soil and Environment, 32, 87–95.Google Scholar
- Okafor, P. C., Okon, P. U., Daniel, E. F., & Ebenso, E. E. (2012). Adsorption capacity of coconut (Cocos nucifera L.) shell for lead, copper, cadmium and arsenic from aqueous solutions. International Journal of Electrochemical Science, 7, 12354–12369.Google Scholar
- Petrusevski, B., Sharma, S. K., Kruis, F., Omeruglu, P., & Schippers, J. C. (2002). Family filter with iron-coated sand: solution for arsenic removal in rural areas. Water Science and Technology: Water Supply, 2, 127–133.Google Scholar
- Sarmah, S., Saikia, J., Bordoloi, D., & Goswamee, R. L. (2017). Surface modification of paddy husk ash by hydroxyl-alumina coating to develop an efficient water defluoridation media and the immobilization of the sludge by lime-silica reaction. Journal of Environmental Chemical Engineering, 5, 4483–4493.CrossRefGoogle Scholar
- Shakoor, M. B., Niazi, N. K., Bibi, I., Shahid, M., Sharif, F., Bashir, S., Shaheen, S. M., Wang, H., Tsang, D. C. W., Ok, Y. S., & Rinklebe, J. (2018). Arsenic removal by natural and chemically modified water melon rind in aqueous solutions and groundwater. Science of the Total Environment, 645, 1444–1455.CrossRefGoogle Scholar
- Sundaram, S.K., Meher, K.K., Kapur, P.C. (2002). A rice husk ash based domestic water filter, Indian patent no. 187147.Google Scholar
- Waqas, H., Shan, A., Khan, Y.G., Nawaz, R., Rizwan, M., Rehman, S.-U., Shakoor, M.B., Ahmed W., Jabeen M., (2017). Human health risk assessment of arsenic in groundwater aquifers of Lahore, Pakistan. Human and Ecological Risk Assessment: An International Journal 836–850.Google Scholar
- Guidelines for drinking water quality, 4th edition, WHO (2011).Google Scholar
- WHO (World Health Organisation). (1981). Environmental health criteria (Vol. 18). Geneva: Arsenic, World Health Organisation.Google Scholar