Table 2.
Examples of fertilizers and micronutrients encapsulated in CHT-based controlled release matrix.
| Matrices | Active Ingredient | Releasing Rate | References |
|---|---|---|---|
| CHT nanoparticles | NPK fertilizer | 15% and 75% by the 3rd and 30th day, respectively. | [120] |
| CHT-methacrylic acid particles (diameter ca. 78 nm) | NPK fertilizer | n.d. | [121] |
| CHT microspheres (diameter ca. 200 mm) | urea | n.d. | [122] |
| CHT-montmorillonite microspheres (diameter ca. 200 mm) | KNO3 | Fast for the first 3 days. Then continuum K release for at least 60 days. | [123] |
| CHT-EDTA | urea | n.d. | [124] |
| CHT-suberoyl chloride particles; crosslinking densities ranking from 0% to 7.4% | Zn2+; Cu2+ | After 6 h ranking from 40 mg (0% density) to 15 mg (7.4% density). | [128] |
| CHT- phthalic anhydride | 1-Naphthylacetic acid | Slow continuous release for several weeks. For example, at 20 °C, 10% and 25% by the 10th and 60th day, respectively. | [129] |