Unveiling the interaction mechanism between facet-dependent pyrite nanoparticles and Cr(VI) under anaerobic environment: adsorption, redox, and phase transformation

Liu, Chenrui; Liu, Yun; Shen, Wentao; Lin, Shuangyi; He, Hao; Li, Fan; Li, Feng; Tian, Jie

doi:10.1016/j.cej.2023.141586

Cited by 6 publications

(2 citation statements)

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“…1 ) constitute the third most prevalent pollutants in wastewater due to their widespread usage in leather tanning, paint production, metallurgy, and cement manufacturing. 2,3 Furthermore, Cr(VI) oxy-anions are ranked as the second most harmful inorganic pollutants due to their bioaccumulative, oncogenic, and mutagenic properties, posing serious threats to human health including irritation, cancer, and chromosome aberration. 4−6 Unlike other heavy-metal ions, Cr(VI) oxy-anions are highly soluble in water over a wide pH range and can easily migrate into natural environments.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The World Health Organization (WHO) has established stringent standards for eliminating pollutants such as toxic heavy metal ions . Among these contaminants, Cr(VI) oxy-anions (CrO 4 2– , HCrO 4 – , and Cr 2 O 7 2– ) constitute the third most prevalent pollutants in wastewater due to their widespread usage in leather tanning, paint production, metallurgy, and cement manufacturing. , Furthermore, Cr(VI) oxy-anions are ranked as the second most harmful inorganic pollutants due to their bioaccumulative, oncogenic, and mutagenic properties, posing serious threats to human health including irritation, cancer, and chromosome aberration. − Unlike other heavy-metal ions, Cr(VI) oxy-anions are highly soluble in water over a wide pH range and can easily migrate into natural environments . Therefore, eliminating Cr(VI) oxy-anions before wastewater discharge is imperative to protect our environment and human health.…”

Section: Introductionmentioning

confidence: 99%

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Cationic Metal–Organic Framework with Amino-Functionalized Isonicotinic Acid for Chromium(VI) Removal

Hou,

Liu,

Xie

et al. 2024

Crystal Growth & Design

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The removal of hexavalent chromium, Cr(VI), from wastewater remains a significant environmental challenge. In this study, we explored the effectiveness of a novel cationic metal–organic framework (MOF), designated as NU-56, for Cr(VI) removal from wastewater. NU-56, composed of a Zr6O8 cluster, monomeric Ni2+, and 3-aminoisonicotinic acid, exhibits a remarkable Cr(VI) removal capacity. Several factors contribute to its efficacy, including the presence of free exchangeable Cl– ions within the network, protonated amino groups on the ligand, and μ3-O/OH on the Zr6O8 cluster, all of which synergistically enhance NU-56’s ability to capture Cr(VI) efficiently under acidic aqueous conditions ranging from pH 4 to 6. In comparison to its isostructural counterpart lacking amino-functionalized isonicotinic acid, amino-functionalized NU-56 demonstrates superior structural integrity during the Cr(VI) elimination process. Additionally, we conducted comprehensive studies on the adsorption kinetics, isotherms, and selectivity of NU-56 for Cr(VI) removal, revealing its potential as a promising candidate with a maximum adsorption capacity of 68 mg/g. This research underscores the significance of developing functionalized MOFs as a viable approach for the removal of oxy-anions from wastewater, offering a straightforward and effective solution to address this pressing environmental concern.

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Section: ■ Introductionmentioning

confidence: 99%