The Effect of Vermiculite Loaded with MnO2 on Adsorption of Heavy Metal Pb(II) in Wastewater
The modified vermiculite with MnO2 was prepared by direct precipitation method using vermiculite, MnSO4 and KMnO4 as raw materials. The composition, structure and morphology of raw-vermiculite and modified-vermiculite were analyzed. The effect of the amount of vermiculite, the time of adsorption and the pH of heavy metal ion solution on the adsorption performance of Pb(II) in wastewater were compared. The results showed that modified vermiculite adsorbed heavy metal ions in water better than natural vermiculite. The maximum removal of lead ions from the aqueous solution reaches 99.148% at 60 min and pH 6 with 0.25 g modified vermiculite. At this point, the adsorption rate of modified vermiculite to Pb(II) is increased by about 30%. The results of this study have practical value in improving the value of vermiculite and the comprehensive treatment to lead wastewater.
KeywordsVermiculite MnO2 Modification Adsorption
The study was strongly funded by the Key Research Projects of Science and Technology Department of Sichuan Province of China (2017GZ0392), and the Science and Technology Huimin Projects of Science and Technology Bureau of Chengdu of Sichuan Province of China (2015-HM01-00387-SF).
- 1.H.N. Kim, W.X. Ren, J.S. Kim et al., Fluorescent and colorimetric sensors for detection of lead, cadmium, and mercury ions. J. Cheminform. 41(8), 3210 (2012)Google Scholar