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基于施瓦特曼尼特的异质芬顿,用于在广泛的pH范围内增强污泥脱水能力

Ting Li¹, Xin Zhang¹, Yujun Zhou²

¹College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China.

Journal of hazardous materials

|August 10, 2023

概括

施瓦特曼尼特复合体Fe3O4 (Sch/Fe3O4) 使用芬顿技术有效地去除污泥的水分,而不需要调整pH值. 这种新的方法减少了化学品的消耗,并改善了污泥蛋糕的特性,以便更好地处置.

科学领域:

环境工程环境工程
水处理技术水处理技术
材料科学材料科学材料科学

背景情况:

基于Fe的芬顿技术对于污泥脱水性至关重要,但需要pH中和,增加化学品的使用.
开发高效,低化学污泥处理方法对于可持续的废水管理至关重要.

研究的目的:

为了研究施瓦特曼尼特复合体Fe3O4 (Sch/Fe3O4) 作为污泥脱水的异质芬顿催化剂的有效性.
为了评估Sch/Fe3O4在提高污泥脱水能力方面的性能,而不需要调整pH值.

主要方法:

在中性pH下使用Sch/Fe3O4和H2O2评估了泥的脱水能力.
测量的关键参数包括特定的过阻力,水分含量和结合水.
分析了反应性物种的产生及其对污泥特性的影响.

主要成果:

在pH 7.5.5下,施/Fe3O4 + H2O2处理实现了高降低过性特异性 (94.4%),水分含量 (11.4%) 和结合水 (45.5%) 的高降低.
该系统产生了SO4(2-) 和H+离子,促进了污泥细胞溶解,并为芬顿反应提供了最佳pH值.
活性物种 (•OH,•O2-, 1O2) 有效降解了污泥EPS,释放了结合的水并改善了污泥蛋糕结构.

结论:

/Fe3O4作为一种有效的异质芬顿催化剂,在不调整pH值的情况下用于污泥脱水.
该过程通过释放结合的水来改善污泥脱水能力,增强蛋糕的透性,并保存有机物质.
这种方法为传统的芬顿方法提供了可持续的替代方案,减少了化学品的消耗,并促进了污泥的处理.

关键词:

不同质的芬顿异质的芬顿 SO(4)(2-) 这样的话.施瓦特曼尼特 (Schwertmannite) 是一种重型人造石.泥的排水是因为泥的排水.

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