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- Title
Modification of 13X Molecular Sieve by Chitosan for Adsorptive Removal of Cadmium from Simulated Wastewater.
- Authors
Yan Shi; Ken Sun; Lixin Huo; Xiuxiu Li; Xuebin Qi; Zhaohui Li
- Abstract
Chitosan was used to modify a 13X molecular sieve to improve its cadmium removal capability. After being modified with 2% chitosan-acetate for 2 h at 30 °C, significant uptake of Cd2+ could be achieved. The uptake of Cd2+ on the modified 13X molecular sieve followed the Langmuir isotherms with a capacity of 1 mg/g. The kinetics of Cd2+ removal by modified 13X molecular sieve followed a pseudo second-order reaction, suggesting chemisorption or surface complexation. The Cd2+ removal with a sorbent dose of 2 g/L from an initial concentration of 100 2+g/L reached more than 95% in 90 min. The equilibrium Cd2+ concentration was <5 µg/L, which meets the requirements of "Standards for Irrigation Water Quality" (GB5084-2005) (10 µg/L) and MCL and MCLG for groundwater and drinking water (5 µg/L) set by United States Environmental Protection Agency.
- Subjects
CHITOSAN; CHITIN; POLYSACCHARIDES; CADMIUM; HEAVY metals
- Publication
Materials (1996-1944), 2017, Vol 10, Issue 9, p1101
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma10091101