Table 2 Comparison of Cu2+, Pb2+, and Cd2+ sorption capacities with other sorbents
Adsorbent | Adsorption capacity | References | ||
|---|---|---|---|---|
Cu2+ (mg/g) | Pb2+ (mg/g) | Cd2+ (mg/g) | ||
Coffee grounds | – | – | 15.65 | J. Hazard. Mater., 184 (2010) 126–134 |
Red mud | 19.72 | – | 10.57 | Water Research, 32(4) (1998) 1314–1322 |
Soybean straw | 5.40 | 6.84 | 2.02 | Desalination, 229 (2008) 170–180 |
Corn stalk | 3.75 | 6.01 | 5.17 | |
Dried sludge | – | – | 6.6 | Appl. Water Sci., 3 (2013) 321 |
Nano-γ-Al2O3 | – | 6 | 1.1 | J. Environ. Sci. Technol., 12 (2015) 2003–2014 |
Activated poplar sawdust | 9.2 | – | – | J. Hazard. Mater., 137 (2006) 909–914 |
Spent-activated clay | 10.9 | – | – | Sep. Purif. Technol., 54 (2007) 187–197 |
Wheat straw | 4.96 | 9.74 | 5.17 | Proc. 1999 Conference on Hazardous Waste Research, St. Louis, 1999, pp. 121–130 |
Oat straw | 5.15 | 18.86 | 4.72 | |