Facile Upcycling of Hazardous Cr-Containing Electroplating Sludge into Value-Added Metal–Organic Frameworks for Efficient Adsorptive Desulfurization,ACS Sustainable Chemistry & Engineering

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Facile Upcycling of Hazardous Cr-Containing Electroplating Sludge into Value-Added Metal–Organic Frameworks for Efficient Adsorptive Desulfurization
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-06-29 , DOI: 10.1021/acssuschemeng.0c03110
Daniel Manaye Kabtamu _{1,

2,

3} , Yi-nan Wu _{1,

2} , Qian Chen _{1,

2} , Lu Zheng _{1,

2,

4} , Ken-ichi Otake ₄ , Ljiljana Matović _{1,

2,

5} , Fengting Li _{1,

2}

Affiliation

The recycling of heavy metals from solid wastes and transforming these metals into useful materials, such as metal oxides, nanocomposites, and metal–organic frameworks (MOFs), are beneficial for both sustainable development and environmental protection. MOFs are promising for adsorptive desulfurization, owing to their extremely high surface areas and tunable structures. In this paper, for the first time, MIL-53(Cr) was successfully fabricated from electroplating sludge (EPS) as a metal source through a facile hydrothermal method with and without HF. Our synthetic method is novel, green, scalable, and time-efficient. The obtained MIL-53(Cr) was employed as an adsorbent for adsorptive dibenzothiophene removal from liquid fuel. MIL-53(Cr) with HF exhibits a higher desulfurization capacity (40.11 mg g^–1) than that of MIL-53(Cr) without HF (32.80 mg g^–1). The improved adsorption performance of MIL-53(Cr) with HF is attributed to adding a small amount of HF, which produces highly crystalline and relativity pure MIL-53(Cr) microrods with a high surface area and porosity, and is due to a robust metal–sulfur interaction. Furthermore, the regenerated adsorbent can retain 94% of its initial sulfur adsorption capability even after 5 cycles, implying that MIL-53(Cr) prepared from Cr-EPS is an efficient adsorbent for fuel desulfurization. This study provides new insight for the production of high-value-added MOF materials from solid wastes following the principle of “resource reuse”.

中文翻译：

方便地将有害的含铬电镀污泥升级为增值的金属有机框架，以实现高效的吸附脱硫

从固体废物中回收重金属并将其转化为有用的材料，例如金属氧化物，纳米复合材料和金属有机框架（MOF），对于可持续发展和环境保护都是有益的。MOF具有极高的表面积和可调节的结构，因此有望用于吸附脱硫。本文首次通过一种简便的水热方法，在有和没有HF的情况下，以电镀污泥（EPS）作为金属源成功地制造了MIL-53（Cr）。我们的合成方法新颖，绿色，可扩展且省时。将获得的MIL-53（Cr）用作吸附剂，以从液体燃料中去除吸附性二苯并噻吩。具有HF的MIL-53（Cr）表现出更高的脱硫能力（40.11 mg g ^–1）比不含HF的MIL-53（Cr）（32.80 mg g ^–1）高。MIL-53（Cr）对HF的吸附性能提高归因于添加了少量HF，这会产生具有高表面积和孔隙率的高结晶度和相对论性的纯MIL-53（Cr）微棒，这是由于强大的金属-硫相互作用。此外，即使在5个循环后，再生的吸附剂仍可以保留其94％的初始硫吸附能力，这表明由Cr-EPS制备的MIL-53（Cr）是一种有效的燃料脱硫吸附剂。这项研究为遵循“资源再利用”原则从固体废物生产高附加值MOF材料提供了新的见识。

更新日期：2020-08-24

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