(A small number of silver ions in this structure can be replaced by different types of heavy metals). When quarrying phosphorite would release large amounts of PO4, Ag ions, as well as some heavy metals in waste water.
D. Phosphoric acid is a weak acid so voluminous PO4 3- ions, the principle of equilibrium shift Le Chatelie, dimensional response will be thrown back to create more OH ions and therefore raise the pH of the water.
E . According to research by Salamon, just 0.1 ppb (part per billions) of silver ion is enough to kill fish. 0.1 ppb is equivalent to 1 g of water for 10 million litter. (coefficient of variation: 1 ppb = 1 g / 1 million L)
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