Question

在线等 求翻译

The solubility of the metal hydroxide precipitate is one factor that must be considered
in maximizing coagulant performance and in minimizing the amounts of residual Al and Fe in treated water. At low pH, the dissolution of the metalhydroxide precipitate produces positively charged, soluble hydrolysis products and the aquo-metal ion (Al3+ and Fe3+)1. At high pH, the negatively charged, soluble hydrolysis products Al(OH)4 − and Fe(OH)4 − are formed. These species are tetrahedral rather than octahedral, so no further deprotonation can occur. The minimumsolubility pH of aluminum hydroxide precipitate at 25°C is approximately 6.3 (Figure 6.9); for ferric hydroxide it is about 8 (Figure 6.10).The pH of minimum solubility increases with decreasing temperature.At 4°C, the pH of minimum solubility of freshly precipitated aluminum hydroxide is approximately 6.8

Answer 1

溶解的金属氢氧化物沉淀的一个因素必须被考虑
最大限度混凝剂的性能和可以用最低数量的残余铝、铁处理水的。在低pH值,解散metalhydroxide沉淀带正电的、可溶性水解生产产品和aquo-metal离子(Al3 +和Fe3 +)1。在高pH值,带负电荷的、可溶性水解产品铝(OH)4−、低铁(OH)4−就形成了。这些物种正四面体而不是,所以没有进一步的离子虽然能发生。minimumsolubility pH的氢氧化铝的沉淀在25°C约为6.3(图6.9);为铁氢氧化物是8(图6.10最小溶解度),pH值随温度降低。在4°C的pH最低的溶解度沉淀氢氧化铝新鲜约68

Answer 2

溶解的金属氢氧化物沉淀的一个因素必须被考虑
最大限度混凝剂的性能和可以用最低数量的残余铝、铁处理水的。在低pH值,解散metalhydroxide沉淀生产带正电的,
可溶性水解产品和aquo-metal离子(Al3 +和Fe3 +)1。在高pH值,带负电荷的、可溶性水解产品铝(OH)4?、低铁(OH)4?就形成了。这些物种正四面体而不是,所以没有进一步的离子虽然能发生。minimumsolubility pH的氢氧化铝的沉淀在25°C约为6.3(图6.9件),
这首歌是关于氢为铁(图8),pH值6.10最小的溶解性增加减小温度。在4°C的pH最低的溶解度沉淀氢氧化铝新鲜约68