Porous biochar modified with polyethyleneimine (PEI) for effective enrichment of U(VI) in aqueous solution

Xin Wang; Jinghua Feng; Yawen Cai; Ming Fang; Mingguang Kong; Ahmed Alsaedi; Tasawar Hayat; Xiaoli Tan

doi:10.1016/j.scitotenv.2019.134575

Porous biochar modified with polyethyleneimine (PEI) for effective enrichment of U(VI) in aqueous solution

Xin Wang
, Jinghua Feng
, Yawen Cai
, Ming Fang
, Mingguang Kong
, Ahmed Alsaedi
, Tasawar Hayat
, Xiaoli Tan

North China Electric Power University
CAS - Institute of Solid State Physics
Faculty of Sciences, King Abdulaziz University

Research output: Contribution to journal › Article › peer-review

141 Scopus citations

Abstract

This study investigated the modification of moso bamboo biochar with polyethyleneimine (PEI) for the efficient enrichment of U(VI) in aqueous solution. The alkali/acid treated biochars with amine groups (PEI-alkali-biochar or PEI-acid-biochar) were characterized by SEM, BET, TGA, FTIR and XPS. The effects of contact time, U(VI) concentration, pH and ionic strength on U(VI) adsorption by PEI-alkali/acid-biochar were studied. U(VI) adsorption process on PEI-alkali/acid-biochar obeys pseudo-second-order model. Intraparticle diffusion model was used to investigate the controlled factors of the adsorption process. The fitting of Langmuir model gives the maximum adsorption capacities of 212.7 mg/g for PEI-alkali-biochar and 185.6 mg/g for PEI-acid-biochar, which are almost 9–10 times higher than that of pristine biochar (20.1 mg/g). The thermodynamic parameters illustrate that U(VI) adsorption on PEI-alkali/acid-biochar is an exothermic and spontaneous process. The FTIR and XPS analyses imply that U(VI) adsorption by PEI-alkali/acid-biochar is mainly controlled by complexation between U(VI) and amine groups. PEI-alkali/acid-biochar could be considered as a low-cost and outstanding material for U(VI) removal from radionuclide wastewater in practical application.

Original language	English
Article number	134575
Journal	Science of the Total Environment
Volume	708
DOIs	https://doi.org/10.1016/j.scitotenv.2019.134575
State	Published - 15 Mar 2020
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation

Keywords

Adsorption
Biochar
PEI
U(VI)
XPS analysis

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10.1016/j.scitotenv.2019.134575

Cite this

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title = "Porous biochar modified with polyethyleneimine (PEI) for effective enrichment of U(VI) in aqueous solution",

abstract = "This study investigated the modification of moso bamboo biochar with polyethyleneimine (PEI) for the efficient enrichment of U(VI) in aqueous solution. The alkali/acid treated biochars with amine groups (PEI-alkali-biochar or PEI-acid-biochar) were characterized by SEM, BET, TGA, FTIR and XPS. The effects of contact time, U(VI) concentration, pH and ionic strength on U(VI) adsorption by PEI-alkali/acid-biochar were studied. U(VI) adsorption process on PEI-alkali/acid-biochar obeys pseudo-second-order model. Intraparticle diffusion model was used to investigate the controlled factors of the adsorption process. The fitting of Langmuir model gives the maximum adsorption capacities of 212.7 mg/g for PEI-alkali-biochar and 185.6 mg/g for PEI-acid-biochar, which are almost 9–10 times higher than that of pristine biochar (20.1 mg/g). The thermodynamic parameters illustrate that U(VI) adsorption on PEI-alkali/acid-biochar is an exothermic and spontaneous process. The FTIR and XPS analyses imply that U(VI) adsorption by PEI-alkali/acid-biochar is mainly controlled by complexation between U(VI) and amine groups. PEI-alkali/acid-biochar could be considered as a low-cost and outstanding material for U(VI) removal from radionuclide wastewater in practical application.",

keywords = "Adsorption, Biochar, PEI, U(VI), XPS analysis",

author = "Xin Wang and Jinghua Feng and Yawen Cai and Ming Fang and Mingguang Kong and Ahmed Alsaedi and Tasawar Hayat and Xiaoli Tan",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2020",

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doi = "10.1016/j.scitotenv.2019.134575",

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TY - JOUR

T1 - Porous biochar modified with polyethyleneimine (PEI) for effective enrichment of U(VI) in aqueous solution

AU - Wang, Xin

AU - Feng, Jinghua

AU - Cai, Yawen

AU - Fang, Ming

AU - Kong, Mingguang

AU - Alsaedi, Ahmed

AU - Hayat, Tasawar

AU - Tan, Xiaoli

PY - 2020/3/15

Y1 - 2020/3/15

N2 - This study investigated the modification of moso bamboo biochar with polyethyleneimine (PEI) for the efficient enrichment of U(VI) in aqueous solution. The alkali/acid treated biochars with amine groups (PEI-alkali-biochar or PEI-acid-biochar) were characterized by SEM, BET, TGA, FTIR and XPS. The effects of contact time, U(VI) concentration, pH and ionic strength on U(VI) adsorption by PEI-alkali/acid-biochar were studied. U(VI) adsorption process on PEI-alkali/acid-biochar obeys pseudo-second-order model. Intraparticle diffusion model was used to investigate the controlled factors of the adsorption process. The fitting of Langmuir model gives the maximum adsorption capacities of 212.7 mg/g for PEI-alkali-biochar and 185.6 mg/g for PEI-acid-biochar, which are almost 9–10 times higher than that of pristine biochar (20.1 mg/g). The thermodynamic parameters illustrate that U(VI) adsorption on PEI-alkali/acid-biochar is an exothermic and spontaneous process. The FTIR and XPS analyses imply that U(VI) adsorption by PEI-alkali/acid-biochar is mainly controlled by complexation between U(VI) and amine groups. PEI-alkali/acid-biochar could be considered as a low-cost and outstanding material for U(VI) removal from radionuclide wastewater in practical application.

AB - This study investigated the modification of moso bamboo biochar with polyethyleneimine (PEI) for the efficient enrichment of U(VI) in aqueous solution. The alkali/acid treated biochars with amine groups (PEI-alkali-biochar or PEI-acid-biochar) were characterized by SEM, BET, TGA, FTIR and XPS. The effects of contact time, U(VI) concentration, pH and ionic strength on U(VI) adsorption by PEI-alkali/acid-biochar were studied. U(VI) adsorption process on PEI-alkali/acid-biochar obeys pseudo-second-order model. Intraparticle diffusion model was used to investigate the controlled factors of the adsorption process. The fitting of Langmuir model gives the maximum adsorption capacities of 212.7 mg/g for PEI-alkali-biochar and 185.6 mg/g for PEI-acid-biochar, which are almost 9–10 times higher than that of pristine biochar (20.1 mg/g). The thermodynamic parameters illustrate that U(VI) adsorption on PEI-alkali/acid-biochar is an exothermic and spontaneous process. The FTIR and XPS analyses imply that U(VI) adsorption by PEI-alkali/acid-biochar is mainly controlled by complexation between U(VI) and amine groups. PEI-alkali/acid-biochar could be considered as a low-cost and outstanding material for U(VI) removal from radionuclide wastewater in practical application.

KW - Adsorption

KW - Biochar

KW - PEI

KW - U(VI)

KW - XPS analysis

UR - https://www.scopus.com/pages/publications/85076601408

U2 - 10.1016/j.scitotenv.2019.134575

DO - 10.1016/j.scitotenv.2019.134575

M3 - Article

C2 - 31806329

AN - SCOPUS:85076601408

SN - 0048-9697

VL - 708

JO - Science of the Total Environment

JF - Science of the Total Environment

M1 - 134575

ER -

Porous biochar modified with polyethyleneimine (PEI) for effective enrichment of U(VI) in aqueous solution

Abstract

UN SDGs

Keywords

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