A complete process of iron and phosphate releasing from the PPF is observed using electron spectra technique.
选用电子光谱技术研究P PF释放铁和磷酸盐全过程，发现PPF以两种不同速率途径释放铁与磷酸盐。
2
The appearance and Water-releasing Characteristics were described by BET surface area measurement, the environment scanning electron microscope and fast water equipment.