在废水中去除染料的六角化物中,化物的协同作用和结构缺陷
Abdullah-Al Noman1, Kishan Nandi Shoudho1, Zayed Bin Zakir Shawon2
1Department of Chemical Engineering, Bangladesh University of Engineering and Technology Dhaka-1000 Bangladesh iftheker@che.buet.ac.bd.
经过化学处理的六角化物 (h-BN) 有效地从废水中去除阳离子红色和阴离子中性红色染料. 这种修改后的h-BN显示出高效率,特别是对于刚果红色,显示出其用于工业染料修复的潜力.
科学领域:
- 材料科学
- 环境化学
- 处理水
背景情况:
- 工业废水通常含有持续的阳离子和阴离子染料,这给环境带来了挑战.
- 六角化物 (h-BN) 是一种具有吸附应用潜力的材料,但其原生形式可能有局限性.
- 化学改造可以提高像h-BN这样的材料的性能,用于特定的应用,例如去除污染物.
研究的目的:
- 使用化学风化方法对六角化物 (h-BN) 进行结构性修改.
- 评估改性h-BN在废水中去除阳离子刚果红 (CR) 和阴离子中性红 (NR) 染料的有效性.
- 调查影响着染料吸附动力学和同热量的关键因素.
主要方法:
- 六角化物 (h-BN) 通过化学气候变化过程进行了修饰.
- 进行了批量吸附实验,以评估不同pH值,吸附剂剂量,接触时间和初始染料度下的染料去除效率.
- 采用了特征化技术来分析修饰的h-BN的结构和化学变化;模拟了吸附动力学和同温度.
主要成果:
- 修改后的h-BN表现出增强的特性,包括基,增加表面粗度,更大的层间距离,以及更好的溶解性.
- 在特定条件下实现了最佳的去除效率:在pH 2时为CR的99. 23%,在pH 11时为NR的85. 77%.
- 吸附遵循伪二次动力学和兰木尔等热模型,表明在均表面的化学吸附和单层吸附.
结论:
- 结构修饰的h-BN是一种有前途的吸收剂,可以从水溶液中去除阳离子和阴离子染料.
- 这种依赖于pH的吸附主要是由修饰的h-BN表面和染料分子之间的静电相互作用驱动的.
- 修改后的h-BN在工业废水处理中具有应用潜力,尽管复杂的矩阵和重复使用可能会降低效率.
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