Reusable Polyacrylonitrile‐Sulfur Extractor of Heavy Metal Ions from Wastewater

Peng, Li; Jiang, Haibin; Barr, Ariel Rebekah; Ren, Zhichu; Gao, Rui; Wang, Hua; Fan, Weiwei; Zhu, Meifang; Xu, Guiyin; Li, Ju

doi:10.1002/adfm.202105845

Cited by 25 publications

(10 citation statements)

References 69 publications

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“…The reason for the reason for the favorable adsorption of Hg(II) is mainly because the existence of peripheral sulfur groups in the adsorbents. Sulfur is attributed to soft base and exhibits excellent binding ability toward soft acid Hg(II) according to HSAB theory. , The adsorption amount is gradually decreased with the increase of TEOS amount. For example, the adsorption amounts of G2.0-S-1/2 are 1.65 and 0.46 mmol·g –1 for Hg(II) and Cd(II), whereas those of G2.0-S-1/10 for the two metal ions are 0.92 and 0.20 mmol·g –1 , which decreased by 44.2% and 56.5%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Direct Synthesis of Sulfur-Decorating PAMAM Dendrimer/Mesoporous Silica for Enhanced Hg(II) and Cd(II) Adsorption

et al. 2022

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Water security caused by heavy metals poses a deleterious hazard to public health and the ecological system. The construction of adsorbents by polyamidoamine (PAMAM) dendrimers for efficient removal of metal ions has attracted considerable interest. However, the general method for the fabrication of these adsorbents was achieved by the surface chemical modification of the substrates with PAMAM dendrimer, which usually causes the defects of low density and uneven distribution of the dendrimer, the blocking of pores, and reducing the adsorption performance. Hence, the development of a new method for preparation of PAMAM dendrimer-based adsorbent to realize the efficient and enhanced adsorption of metal ions is still a challenge. Herein, methylisothiocyanate decorated PAMAM dendrimer/mesoporous silica composites (G0-S-1/x, G1.0-S-1/x, G2.0-S-1/x, x = 2, 4, 6, 8, 10) were synthesized by the direct sol–gel reaction of alkoxysilyl-containing functional PAMAM dendrimer. The adsorbents display enhanced adsorption property for Hg(II) and Cd(II) as compared with the same adsorbents which were prepared by traditional chemical modification method. Take G2.0-S-1/2 as an example, the maximum adsorption capacities are 2.41 and 0.87 mmol·g–1 for Hg(II) and Cd(II), respectively . Moreover, the adsorbents show excellent selective adsorption and regeneration property. G2.0-S-1/2 displays distinct selectivity for Hg(II) with the presence of Co(II), Pb(II), Cd(II), and Cu(II). The regeneration percentage still maintains 95.2% after five adsorption–desorption cycles. The adsorption mechanism is also certified by the experimental method and theoretical calculation.

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Section: Resultsmentioning

confidence: 99%

Direct Synthesis of Sulfur-Decorating PAMAM Dendrimer/Mesoporous Silica for Enhanced Hg(II) and Cd(II) Adsorption

et al. 2022

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“…[430,431] Of them, the construction of the catalysis systems (such as photocatalytic and electrocatalytic systems) is considered to be a potential method for the efficient detection of heavy metal ions. [432,433] Owing to the superior porosity, large specific surface area, good adsorption ability, and rich surface functional groups, [434,435] MOF-based compounds have received significant research interest for the detection of different types of heavy metal ions, such as Cr (VI), [436,437] Pb(II), [438,439] Fe(III), [440,441] Hg(II), [442,443] Cd (II), [444,445] As(III), [446,447] Cu(II), [448,449] Co(III), [450,451] and Al (III). [452,453] For example, in 2021, Hussain et al [437] designed the UiO-66-NH 2 @BiOCl composite as an efficient photocatalyst for the reduction of Cr(VI) to Cr(III).…”

Section: Heavy Metal Ion Detectionmentioning

confidence: 99%

A Review of Metal–Organic Framework‐Based Compounds for Environmental Applications

Qian

Zhang

Kang

et al. 2023

Energy & Environ Materials

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Metal-organic framework-based compounds have recently gained great attention because of their unique porous structure, ordered porosity, and high specific surface area. Benefiting from these superior properties, metalorganic framework-based compounds have been proven to be one of the most potential candidates for environmental governance and remediation. In this review, the different types of metal-organic framework-based compounds are first summarized. Further, the various environmental applications of metal-organic framework-based compounds including organic pollutant removal, toxic and hazardous gas capture, heavy metal ion detection, gas separation, water harvesting, air purification, and carbon dioxide reduction reactions are discussed in detail. In the end, the opportunities and challenges for the future development of metal-organic framework-based compounds for environmental applications are highlighted.

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“…The removal of Pb 2+ , Cd 2+ , and Zn 2+ were 71%, 9%, and 6%, respectively, which suggests that SCV-3 aerogels can remove lead ions with super selectivity in the complex aquatic environment due to the higher K d value of lead. [39] Then more heavy metal ions were introduced to explore the selectivity adsorption of Pb 2+ (Figure S12, Supporting Information). Under the existence of Cd 2+ , Zn 2+ , Ni 2+ , and Mg 2+ , the SCV-3 aerogel showed high selectivity for Pb 2+ .…”

Section: Regulation Of the Adsorption Performancementioning

confidence: 99%

Biosafe Saccharomyces Cerevisiae Immobilized Nanofibrous Aerogels for Integrated Lead Removal in Human Body

Cao

Dong

et al. 2023

Adv Funct Materials

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Emerging adsorption technology shows great potential for Pb 2+ removal in the human body because of its high adsorption efficiency and easy operation. However, biosafety concerns in the human body limit the development of adsorbents in integrated lead removal for acute poisoning in humans from the gastrointestinal tract and even the blood. In this work, highly bio-safe and natural saccharomyces cerevisiae cells are immobilized on the interworking natural regenerated cellulose nanofibers network for integrated lead removal in the human body. High intrinsic biosafety of the aerogel is guaranteed due to the biocompatibility of aerogel composition and the absence of crosslinking substances. Attributing to the porous structure of cellulose nanofibrous scaffolds, saccharomyces cerevisiae cells are protected from shedding, and considerable loading sites for saccharomyces cerevisiae cells are ensured. Simultaneously, abundant functional groups on the saccharomyces cerevisiae cells exhibit superior adsorption ability with a saturated adsorption capacity of lead ions as high as 107 mg g −1 in the aquatic environment. After adsorption, Pb 2+ concentration decreases from 879.70 to 248.53 µg L −1 in the intestinal phase and from 400 to 186.29 µg L −1 (within a safe level) in blood, providing an attractive strategy for detoxification of integrated lead in the human body.

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Reusable Polyacrylonitrile‐Sulfur Extractor of Heavy Metal Ions from Wastewater

Cited by 25 publications

References 69 publications

Direct Synthesis of Sulfur-Decorating PAMAM Dendrimer/Mesoporous Silica for Enhanced Hg(II) and Cd(II) Adsorption

Direct Synthesis of Sulfur-Decorating PAMAM Dendrimer/Mesoporous Silica for Enhanced Hg(II) and Cd(II) Adsorption

A Review of Metal–Organic Framework‐Based Compounds for Environmental Applications

Biosafe Saccharomyces Cerevisiae Immobilized Nanofibrous Aerogels for Integrated Lead Removal in Human Body

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