Study of Cd<sup>2+</sup>, Al<sup>3+</sup>, and SO<sub>4</sub><sup>2−</sup>Ions Influence on Struvite Precipitation from Synthetic Water by Dissolved CO<sub>2</sub>Degasification Technique

• 作者: Atef Korchef Hassidou Saidou Mohamed Ben Amor Sami Ben Moussa
• 来源期刊: 无机化学期刊(英文)
• 学科: 医学
• 关键词: CO2 Degasification TECHNIQUE STRUVITE Precipitation Cd2+ Al3+ SO42-
• 年，卷（期）: 2015,（3）
• 页码范围: 41-51
• 页数: 11页
• 分类号: R73

摘要

The effect of cadmium, aluminum, and sulphate ions on struvite precipitation kinetics and morphology of solids obtained was investigated in this study. Thus, these ions were introduced as additives in solution where struvite precipitation was achieved. The main results obtained showed that the Cd2+ ions cause the probable co-formation, with struvite, of an amorphous phase observed from Cd2+ concentration of 10 mg/L;the addition of aluminum ions in the solution does not affect the nature of the crystalline phase, identified as struvite. However, these ions cause the formation of agglomerates of larger and larger as the concentration rises. Moreover, their increasing improved significantly the yield of phosphates removal;although the sulfate ions have no effect on the nature of the precipitated phase identified as struvite, independently of molar ratio studied, they affect the thermal decomposition of struvite. This latter is done in a single step by increasing the concentration of these ions for the SO42−/PO43−molar ratio of 8.