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用于酸盐吸附和从废水中回收的铁酸盐

Matheus Henrique Pimentel Araújo¹, José Domingos Ardisson², Alisson Carlos Krohling²

¹Universidade Federal de Viçosa - Campus Florestal - UFV Rodovia LMG 818, km 06, s/n, Campus Universitário Florestal MG 35690-000 Brazil matheus.pimentel@ufv.br.

|January 5, 2024

概括

合成了铁材料,并测试了从废水中去除酸盐. 该研究发现,铁矿结构对于有效的酸盐吸附至关重要,尽管恢复证明具有挑战性.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
无机化学无机化学

背景情况:

废水中的酸盐污染对环境构成重大风险.
有效的酸盐吸附和回收方法对于水资源整治至关重要.
铁矿是吸附污染物的潜在候选者,因为它们的化学特性.

研究的目的:

为了合成具有不同Ca:Fe比率的铁酸盐.
评估它们在吸附和从废水中回收酸盐的效率.
了解铁酸盐结构在酸盐吸附中的作用.

主要方法:

使用不同温度 (300,700,900°C) 的酸盐和酸盐合成酸盐.
使用热重力测量分析 (TG),X射线衍射 (XRD),Mössbauer光谱,扫描电子显微镜 (SEM),振动样本磁力测量 (VSM) 和Brunauer-Emmett-Teller (BET) 分析进行表征.
在各种条件下 (pH,度,接触时间,共存离子) 进行了酸盐吸附/脱附实验.

主要成果:

两个不同的铁酸盐相,CaFe2O4和Ca2Fe2O5,在700和900°C时形成.
酸盐吸附能力受到铁酸盐结构形成的显著影响.
观察到高吸附能力 (62-75 mg g-1对于CaFe1:2-700),但回收效率有限 (15-39%).

结论:

铁酸的晶体结构对于高效的酸盐吸附至关重要.
铁酸盐在酸盐去除方面表现有前途,但在有效的回收方面仍然存在挑战.
进一步的研究可能将重点放在优化实际应用的脱吸过程上.

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