低成本的蛋飞灰吸收剂用于酸盐回收:一种潜在的缓释酸盐肥料
Chengyou Sun1, Chao Huang1, Ping Wang1
1College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
Water research
|March 20, 2024
概括
这项研究开发了一种蛋飞地质聚合物复合物 (EFG),用于低成本从水中去除. EFG具有很高的吸附能力,良好的再生能力,并具有缓释酸肥的潜力.
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:
- 飞和蛋是大量的固体废物.
- 从水中回收对于环境保护至关重要.
- 现有的吸附剂可能昂贵且化学密集.
研究的目的:
- 通过使用蛋飞复合材料 (EFG) 合成一个具有成本效益和环保的酸盐吸附剂.
- 调查EFG的酸盐吸附能力和机制.
- 评估EFG的再生,实际应用潜力和缓释特性.
主要方法:
- 使用蛋和飞灰合成EFG,利用CaO用于活性位点和CO2用于毛孔形成.
- 确定酸盐吸附的最佳蛋飞灰比率.
- 使用伪二阶和兰格穆尔模型描述了吸附动力学和同热量.
- 通过在不同pH值的多个脱吸周期进行评估的再生.
- 在柱体实验和土壤埋葬试验中评估了EFG性能.
主要成果:
- 在40%的蛋飞灰比率下,EFG实现了49.92 mg P/g的最大酸盐吸附能力.
- 吸附遵循伪二次动力学和兰格穆尔异热模型.
- 在六个周期内,EFG表现出良好的再生能力,在pH值4.0时具有最佳的脱吸.
- 柱体实验证实了EFG作为一种低成本的过介质,用于去除的有效性.
- 土壤埋葬测试显示,酸盐缓释持续长达60天.
结论:
- EFG是一种有前途,低成本和环保的吸收剂,用于从水中回收.
- 该材料具有高效的吸附性,再生性和农业应用的潜力,作为缓释肥料.
- 在解决水质问题的同时,EFG为固体废物管理提供了一个可持续的解决方案.
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