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  1. Article ; Online: Synthesis and application of tuneable carbon-silica composites from the microwave pyrolysis of waste paper for selective recovery of gold from acidic solutions.

    Sotiriou, Konstantina / Supanchaiyamat, Nontipa / Jiang, Tengyao / Janekarn, Intuorn / García, Andrea Muñoz / Budarin, Vitaliy L / MacQuarrie, Duncan J / Hunt, Andrew J

    RSC advances

    2020  Volume 10, Issue 42, Page(s) 25228–25238

    Abstract: Microwave pyrolysis bio-oil from waste paper and K60 silica gel has successfully been utilised to synthesise mesoporous carbon-silica composites with uniquely tuneable surface properties, where functionality and structural characteristics can be altered ... ...

    Abstract Microwave pyrolysis bio-oil from waste paper and K60 silica gel has successfully been utilised to synthesise mesoporous carbon-silica composites with uniquely tuneable surface properties, where functionality and structural characteristics can be altered and even enhanced by curing at different temperatures. This temperature-dependence resulted in composites ranging from highly oxygenated polymerised bio-oil composites at 300 °C to aromatic carbonaceous materials covering the silica surface at 800 °C, making them attractive materials for gold recovery from mining wastewater. The composite materials exhibit exceptional ability and selectivity to recover gold from dilute solutions. Metal adsorption on the surface of these composites proceeded
    Language English
    Publishing date 2020-07-02
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d0ra02279a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Synthesis and application of tuneable carbon–silica composites from the microwave pyrolysis of waste paper for selective recovery of gold from acidic solutions

    Sotiriou, Konstantina / Supanchaiyamat, Nontipa / Jiang, Tengyao / Janekarn, Intuorn / García, Andrea Muñoz / Budarin, Vitaliy L / MacQuarrie, Duncan J / Hunt, Andrew J

    RSC advances. 2020 July 02, v. 10, no. 42

    2020  

    Abstract: Microwave pyrolysis bio-oil from waste paper and K60 silica gel has successfully been utilised to synthesise mesoporous carbon–silica composites with uniquely tuneable surface properties, where functionality and structural characteristics can be altered ... ...

    Abstract Microwave pyrolysis bio-oil from waste paper and K60 silica gel has successfully been utilised to synthesise mesoporous carbon–silica composites with uniquely tuneable surface properties, where functionality and structural characteristics can be altered and even enhanced by curing at different temperatures. This temperature-dependence resulted in composites ranging from highly oxygenated polymerised bio-oil composites at 300 °C to aromatic carbonaceous materials covering the silica surface at 800 °C, making them attractive materials for gold recovery from mining wastewater. The composite materials exhibit exceptional ability and selectivity to recover gold from dilute solutions. Metal adsorption on the surface of these composites proceeded via both chemisorption and physisorption leading to the reduction of Au(iii) to Au(0), resulting in high recovery capacities for gold. Composite material prepared at 500 °C demonstrated the optimum combination of surface functionality and porosity, allowing for an adsorption capacity of 320 mg g⁻¹ of gold and with 99.5% removal being achieved at concentrations mimicking those of real-life mine tailing wastes. All materials pioneered in this research display great potential as selective adsorbents for the recovery of gold from acidic media.
    Keywords adsorbents ; adsorption ; composite materials ; gold ; mine tailings ; mining ; polymerization ; porosity ; porous media ; pyrolysis ; pyrolysis oils ; silica gel ; temperature ; waste paper ; wastewater
    Language English
    Dates of publication 2020-0702
    Size p. 25228-25238.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/d0ra02279a
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Delayed presentation of aortoesophageal fistula after endovascular repair.

    Kouritas, Vasileios K / Dedeilias, Panagiotis / Sotiriou, Konstantina / Klimopoulos, Serafim

    Asian cardiovascular & thoracic annals

    2016  Volume 24, Issue 1, Page(s) 51–53

    Abstract: The incidence of aortoesophageal fistula after thoracic endovascular aortic repair has increased following an increase in thoracic endovascular aortic procedures. A 68-year-old man was diagnosed with aortoesophageal fistula 6 years after thoracic ... ...

    Abstract The incidence of aortoesophageal fistula after thoracic endovascular aortic repair has increased following an increase in thoracic endovascular aortic procedures. A 68-year-old man was diagnosed with aortoesophageal fistula 6 years after thoracic endovascular aortic repair of a descending aortic aneurysm. Due to massive hematemesis and instability, he underwent a left thoracotomy, graft repair of the aorta with stent removal, gastrostomy, and proximal esophagostomy. Unfortunately, he died 1 week later due to sepsis. Aortoesophageal fistula may present long after thoracic endovascular aortic repair, and clinicians treating such cases should always be aware of this complication.
    MeSH term(s) Aged ; Aortic Aneurysm, Thoracic/surgery ; Aortography/methods ; Blood Vessel Prosthesis ; Blood Vessel Prosthesis Implantation/adverse effects ; Blood Vessel Prosthesis Implantation/instrumentation ; Device Removal ; Endovascular Procedures/adverse effects ; Endovascular Procedures/instrumentation ; Esophageal Fistula/diagnosis ; Esophageal Fistula/etiology ; Esophageal Fistula/surgery ; Esophagostomy ; Fatal Outcome ; Gastrostomy ; Hematemesis/etiology ; Humans ; Male ; Reoperation ; Risk Factors ; Sepsis/etiology ; Stents ; Thoracotomy ; Time Factors ; Tomography, X-Ray Computed ; Vascular Fistula/diagnosis ; Vascular Fistula/etiology ; Vascular Fistula/surgery
    Language English
    Publishing date 2016-01
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 1400468-9
    ISSN 1816-5370 ; 0218-4923
    ISSN (online) 1816-5370
    ISSN 0218-4923
    DOI 10.1177/0218492314538035
    Database MEDical Literature Analysis and Retrieval System OnLINE

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