|
| 海藻酸钠对蓝铁矿晶体生长和形态的影响分析 |
| Research on the Influence of Sodium Alginate on the Growth and Morphology of Vivianite Crystals |
| |
| DOI： |
| 中文关键词: 蓝铁矿 海藻酸钠 胞外聚合物 磷回收 晶体形态 |
| 英文关键词: Vivianite Sodium alginate Extracellular polymeric substances Phosphorus recovery Crystal morphology |
| 基金项目:国家自然科学基金资助项目（52370021）；安徽省教育厅创新团队基金资助项目（2022AH010019）；安徽省教育厅重点基金资助项目（2022AH050258） |
|
| 摘要点击次数: 34 |
| 全文下载次数: 13 |
| 中文摘要: |
| 以NaH2PO4模拟废水中的磷（P）源，FeCl2·4H2O作为蓝铁矿结晶所需的铁源，海藻酸钠（SA）为胞外聚合物（EPS）进行蓝铁矿结晶试验，通过XRD、FTIR、XPS、SEM、EDS等表征手段考察SA对蓝铁矿晶体生长和形态的影响。结果表明：SA分子可选择性地吸附和结合在Fe含量较高的晶面上，阻断活性生长位点，抑制蓝铁矿的生长，导致P回收率降低，使蓝铁矿晶体尺寸减小、形貌受损、结晶纯度下降。降低环境中SA浓度将更有利于蓝铁矿的结晶与回收。 |
| 英文摘要: |
| Vivianite crystallization experiments were conducted using NaH2PO4 to simulate the phosphorus source in wastewater， FeCl2·4H2O as the iron source， and sodium alginate（SA） as the extracellular polymeric substance（EPS）. The influence of SA on the growth and morphology of vivianite crystals were investigated by XRD， FTIR， XPS， SEM and EDS characterization. The results showed that SA molecules could selectively adsorb and bind to the crystal faces with higher Fe content， blocking the active growth sites and inhibiting the growth of vivianite. This led to a decrease in the recovery rate of phosphorus， and a reduction in the size， morphology and purity of vivianite crystals. Reducing the concentration of SA in the environment would be more conductive to the crystallization and recovery of vivianite. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
