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Preparation of biochar from constructed wetland plant and its adsorption performance towards Cu2+.

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Title: Preparation of biochar from constructed wetland plant and its adsorption performance towards Cu2+.
Authors: Xiao, Liping1 (AUTHOR) xiaoliping@qut.edu.cn, Lu, Hongbin2 (AUTHOR), Li, Jiaxin3 (AUTHOR), Kong, Qiaoping1 (AUTHOR), Lan, Yunlong1 (AUTHOR), Wang, Dongxue1 (AUTHOR)
Source: Environmental Science & Pollution Research. Jul2022, Vol. 29 Issue 31, p47109-47122. 14p.
Subject Terms: *Wetland plants, *Constructed wetlands, *Langmuir isotherms, *Plant performance, *Heavy metal toxicology, *Biochar
Abstract: In order to solve problems in the treatment and disposal of huge production of artificial wetland plants and heavy metal pollution, two constructed wetland plants of reed and gladiolus were selected as raw materials to prepare biochar for adsorbing heavy metals from aqueous solutions. The experimental results showed that reed biochar prepared at 600℃ and activated by KOH with an impregnation ratio of 1:3 (KRAC-3) exhibited relatively high adsorption ability towards Cu2+. The optimal results analyzed by Design-Expert software showed that the maximum adsorption rate of KRAC-3 towards Cu2+ was obtained under the optimal conditions of adsorbent dosage of 1.2 g/L, pH of 4.96, and reaction time of 137.43 min. The adsorption of Cu2+ followed pseudo-second-order kinetics and the Langmuir adsorption model. The theoretical maximum adsorption capacity of KRAC-3 calculated from the Langmuir isotherm model was 148.08 mg/g. Microscopic tests with the help of SEM, EDS, and XRD revealed that physical adsorption, ion exchange, electrostatic adsorption, surface complexation, and precipitation were the main adsorption mechanism of Cu2+ loading onto KRAC-3. This study will provide a theoretical basis for the application of biochar prepared from constructed wetland plants and the treatment of heavy metal-containing wastewater. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 157628525
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Preparation of biochar from constructed wetland plant and its adsorption performance towards Cu<superscript>2+</superscript>.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Xiao%2C+Liping%22">Xiao, Liping</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> xiaoliping@qut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Lu%2C+Hongbin%22">Lu, Hongbin</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Jiaxin%22">Li, Jiaxin</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kong%2C+Qiaoping%22">Kong, Qiaoping</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lan%2C+Yunlong%22">Lan, Yunlong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Dongxue%22">Wang, Dongxue</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Environmental+Science+%26+Pollution+Research%22">Environmental Science & Pollution Research</searchLink>. Jul2022, Vol. 29 Issue 31, p47109-47122. 14p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Wetland+plants%22">Wetland plants</searchLink><br />*<searchLink fieldCode="DE" term="%22Constructed+wetlands%22">Constructed wetlands</searchLink><br />*<searchLink fieldCode="DE" term="%22Langmuir+isotherms%22">Langmuir isotherms</searchLink><br />*<searchLink fieldCode="DE" term="%22Plant+performance%22">Plant performance</searchLink><br />*<searchLink fieldCode="DE" term="%22Heavy+metal+toxicology%22">Heavy metal toxicology</searchLink><br />*<searchLink fieldCode="DE" term="%22Biochar%22">Biochar</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In order to solve problems in the treatment and disposal of huge production of artificial wetland plants and heavy metal pollution, two constructed wetland plants of reed and gladiolus were selected as raw materials to prepare biochar for adsorbing heavy metals from aqueous solutions. The experimental results showed that reed biochar prepared at 600℃ and activated by KOH with an impregnation ratio of 1:3 (KRAC-3) exhibited relatively high adsorption ability towards Cu2+. The optimal results analyzed by Design-Expert software showed that the maximum adsorption rate of KRAC-3 towards Cu2+ was obtained under the optimal conditions of adsorbent dosage of 1.2 g/L, pH of 4.96, and reaction time of 137.43 min. The adsorption of Cu2+ followed pseudo-second-order kinetics and the Langmuir adsorption model. The theoretical maximum adsorption capacity of KRAC-3 calculated from the Langmuir isotherm model was 148.08 mg/g. Microscopic tests with the help of SEM, EDS, and XRD revealed that physical adsorption, ion exchange, electrostatic adsorption, surface complexation, and precipitation were the main adsorption mechanism of Cu2+ loading onto KRAC-3. This study will provide a theoretical basis for the application of biochar prepared from constructed wetland plants and the treatment of heavy metal-containing wastewater. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s11356-022-18608-1
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 47109
    Subjects:
      – SubjectFull: Wetland plants
        Type: general
      – SubjectFull: Constructed wetlands
        Type: general
      – SubjectFull: Langmuir isotherms
        Type: general
      – SubjectFull: Plant performance
        Type: general
      – SubjectFull: Heavy metal toxicology
        Type: general
      – SubjectFull: Biochar
        Type: general
    Titles:
      – TitleFull: Preparation of biochar from constructed wetland plant and its adsorption performance towards Cu2+.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Xiao, Liping
      – PersonEntity:
          Name:
            NameFull: Lu, Hongbin
      – PersonEntity:
          Name:
            NameFull: Li, Jiaxin
      – PersonEntity:
          Name:
            NameFull: Kong, Qiaoping
      – PersonEntity:
          Name:
            NameFull: Lan, Yunlong
      – PersonEntity:
          Name:
            NameFull: Wang, Dongxue
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          Dates:
            – D: 01
              M: 07
              Text: Jul2022
              Type: published
              Y: 2022
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              Value: 09441344
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              Value: 29
            – Type: issue
              Value: 31
          Titles:
            – TitleFull: Environmental Science & Pollution Research
              Type: main
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