Structural regulation of electroplating sludge by a metal–organic framework synthesis method for an enhanced denitrification activity

Ma, Jianlong; Li, Chuanhua; Hu, Lanyu; Kong, Wangsheng; Lu, Qingyi; Zhang, Jia

doi:10.1007/s10163-020-01146-8

Cited by 7 publications

(3 citation statements)

References 46 publications

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“…The phase composition of CRES is shown in Figure 1. According to its X-ray diffraction (XRD) pattern, CRES had a very low crystallinity, as described in the literature [28]. The main crystalline phases of CRES were found to be CrO(OH) and Cr(OH)3•3H2O.…”

Section: Raw Materialsmentioning

confidence: 69%

CO–H2 Gas-Based Reduction Behavior of Cr-Rich Electroplating Sludge Mixed with Iron Ore Powder

Zhang,

Peng,

et al. 2024

Metals

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Cr-rich electroplating sludge (CRES) is a complicated solid waste with high contents of chromium and iron. It can be used as a main feed of the FINEX ironmaking process, which requires gas-based reduction before smelting reduction to produce molten iron with the proper addition of iron ore powder. In this study, the CO–H2 gas-based reduction behavior of CRES mixed with iron ore powder was evaluated between 700 °C and 850 °C, with a focus on the variations of key components containing Fe, Cr, and S with reduction temperature and time. It was found that the iron oxides in CRES had stepwise conversions to metallic iron as the reduction reaction proceeded. The iron metallization degree of the mixture of CRES and iron ore powder increased obviously below 750 °C and then grew minorly with the further increase of temperature. Moreover, this index varied similarly with an extension of reduction time up to 80 min. After reduction at 750 °C for 60 min with the volume concentration of H2 of 30% and flow rate of 160 mL/min, the iron metallization degree reached 79.08%. The rate in the process was limited by a chemical reaction with an activation energy of 41.32 kJ/mol. Along with the stepwise reduction of iron oxides to metallic iron, the chromium hydroxide and sulfates in CRES were reduced to Cr2O3 and sulfites and sulfides, respectively.

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Section: Raw Materialsmentioning

confidence: 69%

CO–H2 Gas-Based Reduction Behavior of Cr-Rich Electroplating Sludge Mixed with Iron Ore Powder

Zhang,

Peng,

et al. 2024

Metals

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“…The valorisation of electroplating sludge opens avenues for its multifaceted utilization. It can serve as a fertilizer, pigment, construction material, adsorbent, catalyst, or be employed in the production of special functional materials [95,96]. Despite these opportunities, challenges and considerations in implementing electroplating sludge in material science should not be overlooked.…”

Section: Sludgementioning

confidence: 99%

“…Electroplating sludge is rich in valuable metals, so in the future this waste has the potential to be converted into high-performance materials [95]. For example, metal-organic frameworks (MOFs) synthesized from sludge can be used for efficient gas storage and separation, while biosurfactants extracted from sludge can be used in environmentally friendly cleaning products [96,98].…”

Section: Sludgementioning

confidence: 99%

Uncovering the potential of industrial waste: turning discarded resources into sustainable advanced materials

Rauf,

Heryanto,

Tahir

et al. 2024

Phys. Scr.

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To identify solutions for utilizing industrial wastes (slag, sludge, fly ash, and bottom ash) in the development of pro-environmental systems, this paper reviews existing literature and explores material characterization methods. A review analysis was conducted to uncover their potential, and it was found that many utilizations can be made to recycle them into sustainable materials. Structure characterization, optical-dielectric function, and morphology analysis were analyzed to confirm the recent review. Structural properties are represented by crystallite size and crystallinity, where nickel slag shows the smallest distribution (55±10) nm with the highest crystallinity (25.42%), indicating its association with uniformity of response to external disturbances and micro-structural stability. From the analysis of optical and dielectric functions via Kramers Kronig relation, the widening of ∆(LO-TO) was shown by fly ash and slag indicating stable bonding suitable as x-ray shielding and sensor, while high electron loss functions were shown by sludge and bottom ash indicating high potential electronic transition performance. Based on their chemical and physical properties, these industrial wastes are not limited as construction materials and can even be upgraded to more advanced development materials.

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A review on fabricating functional materials by electroplating sludge: process characteristics and outlook

Cao

et al. 2023

Environ Sci Pollut Res

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Structural regulation of electroplating sludge by a metal–organic framework synthesis method for an enhanced denitrification activity

Cited by 7 publications

References 46 publications

CO–H2 Gas-Based Reduction Behavior of Cr-Rich Electroplating Sludge Mixed with Iron Ore Powder

CO–H2 Gas-Based Reduction Behavior of Cr-Rich Electroplating Sludge Mixed with Iron Ore Powder

Uncovering the potential of industrial waste: turning discarded resources into sustainable advanced materials

A review on fabricating functional materials by electroplating sludge: process characteristics and outlook

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