Removal of Pb2+ from Aqueous Solution using Thach Khoan Kaolin from Phu Tho Province
Main Article Content
Abstract
Kaolin sample (mixture of halloysite and kaolinite) from Thach Khoan, Phu Tho province was studied to remove Pb2+ ions from an aqueous solution. The SEM-EDS and TEM analysis showed that in the kaolin sample, tubular halloysite and plate kaolinite minerals coexist, similar to the results from previous studies. The various treatment conditions such as contact time, solution pH, the adsorbent weight, and initial concentration of Pb2+ were examined and evaluated using batch adsorption experiments. The results showed that under experimental conditions of
pH0 = 5.31 and a temperature of 25 °C, with 0.7 g of Thach Khoan kaolin material, the Pb2+ adsorption can reach equilibrium after about 50 minutes and efficiency reached 90.75%. The adsorption process follows the Langmuir adsorption isotherm model with the maximum monolayer adsorption capacity of 3.79 mg/g and follows the pseudo-second-order kinetic equation. This result indicated that unmodified Thach Khoan kaolin with a mixture of tabular halloysite and plate kaolinite minerals has a significant potential in removing heavy ions from aqueous solution.
Keywords:
Halloysite, kaolinite, tabular, pegmatite, Thach Khoan, Pb2 .
References
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(in Vietnamese).
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[4] L. T. Phuoc, L. V. Thai, Synthesis of Zeolite A from Kaolines by Hydrothermal Method, Journal of Science - Can Tho University, Vol. 23b, 2012, pp. 135-139 (in Vietnamese).
[5] T. T. C. Loan, H. T. T. Thuy, P. K. Huyen, A Review on the Modification Techniques to Enhance the Heavy Metals Sorption Capacity of Kaolin Clay from South East Vietnam, Science & Technology Development Journal - Science of The Earth & Environment, Vol. 5, No. SI2, 2021,
pp. SI176-SI199,
https://doi.org//10.32508/stdjsee.v5iSI2.641.
[6] B. H. Bac, N. T. Dung, Finding of Halloysite Nanotubes in Lang Dong Kaolin Deposit, Phu Tho Province, Vietnam Journal of Earth Sciences,
Vol. 37, No. 4, 2015, pp. 299-306, https://doi.org/10.15625/0866-7187/37/4/8058.
[7] B. H. Bac, N. T. Dung, L. Q. Khang, K. T. Hung, N. V. Lam, D. M. An, P. V. Son, T. T. V. Anh,
D. V. Chuong, B. T. Tinh, Distribution and Characteristics of Nanotubular Halloysites in the Thach Khoan Area, Phu Tho, Vietnam, Minerals, Vol. 8, No. 290, 2018, pp. 1-13, https://doi.org/10.3390/min8070290.
[8] B. H. Bac, N. T. Dung, K. T. Hung, N. V. Lam,
D. M. An, T. T. V. Anh, T. T. Toan, N. C. Khuong, Characteristics of Tubular Halloysites in Hang Doi Deposit, Thach Khoan, Phu Tho and Their Chem-Physical Properties, Journal of Mining Industry, Vol. 5, 2018, pp. 80-86 (in Vietnamese).
[9] E. Joussein, S. Petit, G. J. Churchman, B. K. G. Theng, D. Righi, B. Delvaux, Halloysite Clay Minerals - A Review, Clay Minerals, Vol. 40, 2005, pp. 383-426, https://doi.org/10.1180/0009855054040180.
[10] P. Yuan, D. Tan, F. A. Bergaya, Properties and Applications of Halloysite Nanotubes: Recent Research Advances and Prospects, Applied Clay Science, Vol. 112-113, 2015, pp. 75-93, https://doi.org/10.1016/j.clay.2015.05.001.
[11] A. Kilislioglu, B. Bilgin, Adsorption of Uranium on Halloysite, Radiochimica Acta, Vol. 90, No. 3, 2012, pp. 155-160, https://doi.org/10.1524/ract.2002.90.3_2002.155.
[12] T.V. Son, T.V. Quy, Research on Chromium Removal in Water by Modified Bentonite, VNU Journal of Science: Earth and Environmental Sciences, Vol. 28, 2012, pp. 37-43 , https://js.vnu.edu.vn/EES/article/view/1154
[13] S. Cataldo, G. Lazzara, M. Massaro, N. Muratore, A. Pettignano, S. Riela, Functionalized Halloysite Nanotubes for Enhanced Removal of Lead(II) Ions from Aqueous Solutions, Applied Clay Science, Vol. 156, 2016, pp. 87-55, https://doi.org/10.1016/j.clay.2018.01.028
[14] Y. Dong, Z. Liu, L. Chen, Removal of Zn(II) from Aqueous Solution by Natural Halloysite Nanotubes, Journal of Radioanalytical and Nuclear Chemistry, Vol. 292, No. 1, 2012, pp. 435-443, https://doi.org/10.1007/ s10967-011-1425-z
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[16] H. T. Ha, T. D. Minh, H. M. Nguyet, Application of Green Nanocomposite to Adsorb Cadium ion in Wastewater, VNU Journal of Science: Earth and Environmental Sciences, Vol.37, No.1, 2021,
pp 61-68, https://doi.org/10.25073/2588-1094/vnuees.4564.
[17] N. X. Cuong, Study on Adsorption of Methylene Blue from Aqueous Solution by Biochar Derived from Mimosa Pigra Plant, VNU Journal of Science: Earth and Environmental Sciences, Vol. 37, No.2, 2021, pp 43-54, https://doi.org/10.25073/2588-1094/vnuees.4582.
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