Table 1 |
|||||
| Screening of iron chelate systems | |||||
| Iron salt | Chelating agent | Molar ratio | Reaction time (min) | Sulfur recovered mg/gm of iron chelate | % purity Sulfura |
| FeCl3 | Citric acid | 1:2 | 36 | 184.20 | >99 |
| Malic acid | 1:3 | 15 | 499 | >99 | |
| Gluconic acid | 1:3 | 5 | 27.7 | 83.71 | |
| Fe2(SO4)3 | Citric acid | 1:2 | 25 | 137.8 | 97.5 |
| Malic acid | 1:3 | 37 | 235 | >99 | |
| Gluconic acid | 1:3 | 39 | 51 | 88.44 | |
| Fe2(NO3)3 | Citric acid | 1:2 | 10 | 116,83 | 75.96 |
| Malic acid | 1:3 | 5 | 290.88 | 94 | |
| Gluconic acid | 1:3 | 20 | 90 | 99 | |
aThe precipitate besides sulfur also contains C, N, H, and Fe, etc., as shown by elemental analysis
Deshpande et al. Nanoscale Research Letters 2008 3:221 doi:10.1186/1556-276X-3-221
