Sorption of uranium(VI) by La-Al-carboxymethyl konjac glucomannan microsphere sorbent
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The microsphere of carboxymethyl konjac glucomannan immobilizing La3+ and Al3+ (CMKGM-La-Al) has been explored for sorption of U(VI). The maximum U(VI) sorption capacity of the microsphere is found to be 45.4 mg g−1 at pH 5. Experimental data are fitted well with the linear Langmuir and linear pseudo-first-order kinetic model. The sorption process is endothermic, spontaneous and favorable. The possible mechanism of CMKGM modification and sorption of U(VI) on CMKGM-La-Al involves ion exchange and coordination reaction. The comparison between CMKGM-La-Al and other sorbents suggests that CMKGM-La-Al can be considered as an effective sorbent for U(VI) sorption.
KeywordsCarboxymethyl konjac glucomannan La3+ Al3+ Sorption U(VI)
This work is financially supported by the special project of nuclear energy development (13zg610301) and Longshan academic talent research support plan of Southwest University of Science and Technology (17LZX302). Analytical facilities are mainly provided by Engineering Research Center for Biomass Materials, Ministry of Education.
- 1.Keim R (1983) Gmelin handbook of inorganic chemistry, uranium supplement, cation-exchange and chromatography. Springer, BerlinGoogle Scholar
- 8.Jeong KK, Shon JS, Pyo HK (2006) Improvement of removal characteristics of uranium by the immobilization of diphosil powder onto alginate bed. J Nucl Fuel Cycle Waste Technol 4:133–138Google Scholar
- 16.Tian DX (2008) Study on the carboxymethylation modification and property characterization of konjak glucomannan. J Anhui Agric Sci 36:2621–2623Google Scholar
- 19.Bampaiti A, Misaelides P, Noli F (2015) Uranium removal from aqueous solutions using a raw and HDTMA-modified phillipsite-bearing tuff. J Radioanal Nucl Chem 303:2233–2241Google Scholar
- 26.Freundlich HMF (1906) Over the adsorption in solution. J Phys Chem 57:1100–1107Google Scholar
- 35.Saleem N, Bhatti HN (2011) Adsorptive removal and recovery of U(VI) by citrus waste biomass. BioResources 6:2522–2538Google Scholar