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Stabilization of heavy metals in MSWI fly ash with a novel dithiocarboxylate-functionalized polyaminoamide dendrimer.

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Title: Stabilization of heavy metals in MSWI fly ash with a novel dithiocarboxylate-functionalized polyaminoamide dendrimer.
Authors: Zhang, Manling (AUTHOR), Guo, Mengru (AUTHOR), Zhang, Bingru1 (AUTHOR) bingru@tongji.edu.cn, Li, Fengting (AUTHOR), Wang, Hongtao (AUTHOR), Zhang, Hebin (AUTHOR)
Source: Waste Management. Mar2020, Vol. 105, p289-298. 10p.
Subjects: Fly ash, Incineration, Polyamidoamine dendrimers, Heavy metals, Chelating agents, Metalwork, Solid waste
Abstract: • Heavy metal stabilization, using newly developed polymers, PAMAM-0G-DTC, maintained the long term stability of heavy metals at lower doses. • Leachability was analyzed in accordance with different extraction procedures. • Solidifying agents with multiple dithioacid groups bound with metals efficiently. A novel heavy metal chelating agent, dithiocarboxylate-functionalized polyaminoamide dendrimer (PAMAM-0G-DTC), was evaluated for the stabilization of heavy metals from municipal solids waste incineration (MSWI) fly ash. PAMAM-0G-DTC achieved overall stabilization performance at a lower dosage (3% w/w) and a wider pH range (2–13) compared to conventional chelating agents such as sodium dimethyl dithiocarbamate (SDD) and dithiocarboxylate-functionalized tetraethylenepentamine (TEPA-DTC). The leaching toxicity of Pb and Cd in the MSWI fly ash by PAMAM-0G-DTC stabilization met the landfill requirements but could not be achieved by SDD and TEPA-DTC even at a 10 wt% concentration. Sequential chemical extraction of fly ash before and after stabilization shows that PAMAM-0G-DTC can be combined with active heavy metals in water-soluble, interchangeable, and carbonate states to form more stable heavy metals in organic and residual states. Mechanistic studies show that multiple PAMAM-0G-DTC molecules can combine with multiple heavy metals to form three-dimensional network-like super-molecular compounds with an infinite extension of space size. This makes the heavy metals more stable and embedded in the network-like super-molecular structure, thus minimizing the potential risk of leaching. Overall, by forming more geochemically stable phases, the treatment of fly ash with PAMAM-0G-DTC has a strong ability to reduce the toxic leaching of heavy metals at a lower dosage and suppress the risk of secondary pollution in a landfill at a wide range of pH values (2–13). [ABSTRACT FROM AUTHOR]
Copyright of Waste Management is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 142319813
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Stabilization of heavy metals in MSWI fly ash with a novel dithiocarboxylate-functionalized polyaminoamide dendrimer.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Manling%22">Zhang, Manling</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Mengru%22">Guo, Mengru</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Bingru%22">Zhang, Bingru</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> bingru@tongji.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Fengting%22">Li, Fengting</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Hongtao%22">Wang, Hongtao</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Hebin%22">Zhang, Hebin</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Waste+Management%22">Waste Management</searchLink>. Mar2020, Vol. 105, p289-298. 10p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Fly+ash%22">Fly ash</searchLink><br /><searchLink fieldCode="DE" term="%22Incineration%22">Incineration</searchLink><br /><searchLink fieldCode="DE" term="%22Polyamidoamine+dendrimers%22">Polyamidoamine dendrimers</searchLink><br /><searchLink fieldCode="DE" term="%22Heavy+metals%22">Heavy metals</searchLink><br /><searchLink fieldCode="DE" term="%22Chelating+agents%22">Chelating agents</searchLink><br /><searchLink fieldCode="DE" term="%22Metalwork%22">Metalwork</searchLink><br /><searchLink fieldCode="DE" term="%22Solid+waste%22">Solid waste</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • Heavy metal stabilization, using newly developed polymers, PAMAM-0G-DTC, maintained the long term stability of heavy metals at lower doses. • Leachability was analyzed in accordance with different extraction procedures. • Solidifying agents with multiple dithioacid groups bound with metals efficiently. A novel heavy metal chelating agent, dithiocarboxylate-functionalized polyaminoamide dendrimer (PAMAM-0G-DTC), was evaluated for the stabilization of heavy metals from municipal solids waste incineration (MSWI) fly ash. PAMAM-0G-DTC achieved overall stabilization performance at a lower dosage (3% w/w) and a wider pH range (2–13) compared to conventional chelating agents such as sodium dimethyl dithiocarbamate (SDD) and dithiocarboxylate-functionalized tetraethylenepentamine (TEPA-DTC). The leaching toxicity of Pb and Cd in the MSWI fly ash by PAMAM-0G-DTC stabilization met the landfill requirements but could not be achieved by SDD and TEPA-DTC even at a 10 wt% concentration. Sequential chemical extraction of fly ash before and after stabilization shows that PAMAM-0G-DTC can be combined with active heavy metals in water-soluble, interchangeable, and carbonate states to form more stable heavy metals in organic and residual states. Mechanistic studies show that multiple PAMAM-0G-DTC molecules can combine with multiple heavy metals to form three-dimensional network-like super-molecular compounds with an infinite extension of space size. This makes the heavy metals more stable and embedded in the network-like super-molecular structure, thus minimizing the potential risk of leaching. Overall, by forming more geochemically stable phases, the treatment of fly ash with PAMAM-0G-DTC has a strong ability to reduce the toxic leaching of heavy metals at a lower dosage and suppress the risk of secondary pollution in a landfill at a wide range of pH values (2–13). [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Waste Management is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.wasman.2020.02.004
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 10
        StartPage: 289
    Subjects:
      – SubjectFull: Fly ash
        Type: general
      – SubjectFull: Incineration
        Type: general
      – SubjectFull: Polyamidoamine dendrimers
        Type: general
      – SubjectFull: Heavy metals
        Type: general
      – SubjectFull: Chelating agents
        Type: general
      – SubjectFull: Metalwork
        Type: general
      – SubjectFull: Solid waste
        Type: general
    Titles:
      – TitleFull: Stabilization of heavy metals in MSWI fly ash with a novel dithiocarboxylate-functionalized polyaminoamide dendrimer.
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            NameFull: Zhang, Manling
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            NameFull: Guo, Mengru
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            NameFull: Zhang, Bingru
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            NameFull: Li, Fengting
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            NameFull: Wang, Hongtao
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            NameFull: Zhang, Hebin
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            – D: 15
              M: 03
              Text: Mar2020
              Type: published
              Y: 2020
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