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FePO₄.2H₂O从富含酸的废物流中回收

Nouran T Bahgat¹, Aamash Siddiqui², Philipp Wilfert³

¹Wetsus, European Centre Of Excellence for Sustainable Water Technology, Oostergoweg 7, 8911 MA, Leeuwarden, The Netherlands; Department Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands.

|June 15, 2024

概括

从酸性废水中回收对于防止肥胖化和节约资源至关重要. 这项研究展示了一种新的方法,使用受控的铁 (II) 氧化来实现高回收和优良的沉沉降能力,而无需调整pH值.

科学领域:

环境化学环境化学
水处理技术水处理技术
资源恢复资源回收资源回收

背景情况:

清除对于防止肥胖和回收有限资源至关重要.
传统的沉方法 (如 struvite,酸) 由于pH要求,在酸性流中效果较差.
酸性废水流对高效的回收构成挑战,需要昂贵的pH调整.

研究的目的:

开发一种高效的回收方法,用于酸性流.
为了研究没有pH调整化学品的铁酸盐 (FePO4·2H2O) 的回收.
为了优化回收和沉沉度使用铁 (II) 氧化.

主要方法:

在不同的初始pH,温度和氧化条件下 (pO2,H2O2剂量速度) 使用Fe (III) 和Fe (II) 剂量的评估回收.
使用光学显微镜,SEM,XRD,SQUID,Raman和ICP分析了沉物的特征.
确定了Fe(II) 氧化速率对回收和产品沉降性的影响.

主要成果:

(Fe) 剂量实现了95%以上的回收,但在测试的pH和温度范围内导致沉积能力差.
二) 剂量提高了产品的沉降性,但恢复因氧化条件而异.
确定了4.7 × 10−4mol/l/min的最佳Fe(II) 氧化率,可回收超过95%的总和优异的沉降性 (体积指数为8ml/gP).

结论:

控制的Fe (II) 氧化是从酸性流中恢复的沉沉降能力的关键参数.
提出的Fe (II) -H2O2剂量策略提供了一种新的,有效的回收方法,不需要载体材料或pH调整.
这种方法解决了处理酸性废水的挑战,同时回收有价值的资源.

关键词:

铁 (II) 氧化过程在H2O2中,H2O2是H2O的.拉曼·拉曼,拉曼·拉曼,拉曼·拉曼.鱼是什么意思鱼结算能力结算能力结算能力类似于岩的结构

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