粘土-莫林加种子蛋糕复合物,用于去除阴离子和阴离子染料
Shobha Rawat1, M Mansoor Ahammed1
1Department of Civil Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, 395007, India.
Chemosphere
|December 31, 2023
概括
这项研究开发了一种考利尼特粘土和莫林加种子蛋糕复合物,用于去除染料. 经过修改的复合材料有效地从水中吸收甲蓝和酸-7染料,显示了废水处理的潜力.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 吸附科学 吸附科学
背景情况:
- 工业废水通常含有持久性有机污染物,如甲蓝 (MB) 和酸-7 (AO-7).
- 开发具有成本效益和高效的吸附剂对于从水溶液中去除染料至关重要.
- 考利尼特粘土和Moringa种子蛋糕提供了作为可持续吸附剂前体的潜力.
研究的目的:
- 为了合成和表征一种新的复合物从高酸粘土和Moringa种子蛋糕.
- 为了研究复合物的吸附性能,以去除甲基蓝和酸-7染料.
- 评估复合材料的吸附机制和可重复使用性,用于实际应用.
主要方法:
- 使用化学处理 (NaOH,H2SO4/NaOH) 的复合材料的合成和改造.
- 使用FTIR,SEM-EDS和XRD技术进行吸附剂表征.
- 批量吸附实验不同吸附剂剂量,pH值,初始染料度和接触时间.
- 固定柱吸附试验用于评估流量,床深度和度效应.
- 吸附等温 (弗朗德利希) 和动力 (伪二次) 建模.
- 在多个吸附-脱附周期的重复使用性测试.
主要成果:
- 纳改性复合材料和H2SO4/NaOH改性复合材料显示出分别对AO-7和MB的优越吸附能力.
- 吸附遵循弗洛伊德利希等温和和伪二阶动力学,表明异质的,多层化学吸附.
- 取得的最佳批量去除率为AO-7 (pH2) 的86%,MB (pH10) 的94%.
- 记录的高吸附能力:205.65毫克/克的AO-7和230.49毫克/克的MB.
- 列测试结果被克拉克和床深度服务时间模型解释.
- 复合材料表现出高达四个周期的良好可重复使用性,没有显著的容量损失.
- 竞争性离子影响了AO-7的去除,但没有影响MB的去除.
结论:
- 考利尼特粘土-莫林加种子蛋糕复合物是从废水中去除MB和AO-7染料的有希望的吸附剂.
- 化学修饰可以提高复合材料的吸附性能.
- 吸附过程是复杂的,涉及化学相互作用和异质的表面覆盖.
- 吸附剂在柱子研究中的可重复使用性和有效性表明它在水处理应用中的实际可行性.
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