화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.93, 170-175, January, 2021
DOI10.1016/j.jiec.2020.09.020  Export Citation
Removal of chloride ions from acidic solution with antimony oxides
Xuewen Wang, Yanping Du†, Haoxiang Yang, Shenghui Tian, Qi Ge, Sheng Huang, and Mingyu Wang
  • School of Metallurgy and Environment, Central South University, Changsha 410083, China
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This study aims to investigate the removal of Cl- from acidic solution with antimony oxides. The effects of the adsorbent type, reaction time, reaction temperature, Sb/Cl mole ratio and acidity on adsorption performance and the regeneration of loaded adsorbent were systematically studied. The results shows that Sb2O3·xH2O has the highest adsorption rate (97.64%) among Sb2O3·xH2O, Sb2O5·xH2O, Sb2O4·xH2O and Sb2O3 in the solution containing 1.25 mol/L H2SO4 under the condition of Sb/Cl mole ratio 3:1 and stirring for 2 h at room temperature, and the concentration of Cl- in the acid solution can be reduced to 280 mg/L. Then the residual Sb in the adsorbed solution can be decreased from 48.21 mg/L to 16.09 mg/L by C-SbA which is made by Sb2O5·xH2O. The C-SbA which has been used can be reused after calcining at 400 ℃ for 2 h. The loaded adsorbent was completely regenerated by adding it into NaOH or Na2CO3 solution whose pH is equal or more than 9.5 according to S/L ratio 1:6 g/mL and was stirred for 0.5 h at room temperature. The Cl- in the regenerated solution was crystallized and precipitated in the form of NaCl without evaporation and concentration according to the common ion effect of Na+, and the purity of NaCl was more than 99%.
Keywords:Acidic solution;Chloride ions;Removal;Adsorption;Sb2O3 xH2O
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