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Biomass‐Derived Materials in the Remediation of Heavy‐Metal Contaminated Water: Removal of Cadmium(II) and Copper(II) from Aqueous Solutions
Author(s) -
Tiwari Diwakar,
Lee Seung Mok
Publication year - 2011
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143011x12928814445258
Subject(s) - cadmium , environmental remediation , copper , aqueous solution , environmental chemistry , metal , chemistry , contamination , contaminated water , heavy metals , human decontamination , water pollution , groundwater remediation , water treatment , biomass (ecology) , environmental engineering , nuclear chemistry , environmental science , waste management , geology , organic chemistry , ecology , oceanography , engineering , biology
Manganese‐coated activated carbon (MCAC) and activated carbon were used in batch experiments for the removal of cadmium(II) and copper(II). Results showed that uptake of Cd(II) and Cu(II) was unaffected by increases in pH (3.0 to 8.5) or concentration (1 to 20 mg/L). Increased ionic strength (from 0.001 to 1 M NaNO 3 ), however, significantly affected the uptake of Cd(II); adsorption of Cu(II) was not affected. Freundlich adsorption isotherm results indicated that MCAC possessed higher sorption capacity than activated carbon. Second‐order rate constants were found to be 0.0386 for activated carbon and 0.0633 g/mg·min for MCAC for Cd(II) and 0.0774 for AC and 0.1223 g/mg·min for MCAC for Cu(II). Column experiments showed that maximum sorption capacity of MCAC was 39.48 mg/g for Cu(II) and 12.21 mg/g for Cd(II).