酸水合物复合物是基于葡萄甘的康雅克水凝,在低性溶液中选择性地吸附酸盐
Xingyu Wu1, Siyu Liu1, Siqi Song1
1College of Environment Sciences, Sichuan Agricultural University, Chengdu, 611130, China.
Journal of environmental management
|September 19, 2024
概括
一种新的复合水凝有效地从废水中回收酸盐,作为一种潜在的缓释肥料. 这种材料具有很高的吸附能力和选择性,即使在生物气泥等复杂的溶液中也是如此.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 废水中的营养管理对于环境保护至关重要.
- 从废水中回收可以节约宝贵的资源.
- 现有的酸盐回收方法在效率和选择性方面面临挑战.
研究的目的:
- 开发一种新的复合水凝,用于从水溶液中有效地回收酸盐.
- 研究开发材料的吸附能力,动力学和选择性.
- 探索回收酸盐和吸附剂的潜在应用.
主要方法:
- 康雅克葡萄康曼南/pectin/酸复合水凝 (KP-CSH) 的合成.
- 在各种pH条件和度下进行酸盐吸附实验.
- 动力学和异热学研究以确定吸附机制.
- 在存在竞争性离子和真实生物气泥中进行选择性测试.
- 吸附部位和机制的分析 (结合体交换,复杂化).
- 植物种子发芽和苗木生长的测试.
主要成果:
- KP-CSH表现出高酸盐吸附能力 (3945 mg-P/g在广泛的pH范围内,最大61.2 mg-P/g).
- 吸附过程被确定为化学吸附,主要涉及部位.
- 在复杂矩阵中,KP-CSH对酸盐比其他离子具有很好的选择性.
- 在吸附后,水凝即使在接近中性的pH值下也保持了有效性.
- 恢复后的KP-CSH没有对植物生长产生负面影响,并且增加了叶绿素含量.
结论:
- KP-CSH是一种高效和选择性的吸附剂,用于从废水中回收酸盐.
- 该材料的机制涉及连接物交换和球内复合.
- KP-CSH对资源回收和作为缓释酸盐肥料的潜在使用具有前景.
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