Carboxyl and hydroxyl groups enhance ammonium adsorption capacity of iron (III) chloride and hydrochloric acid modified biochars

Siyuan Wang; Shaoying Ai; Christopher Nzediegwu; Jin Hyeob Kwak; Md Shahinoor Islam; Yichun Li; Scott X. Chang

doi:10.1016/j.biortech.2020.123390

Carboxyl and hydroxyl groups enhance ammonium adsorption capacity of iron (III) chloride and hydrochloric acid modified biochars

Siyuan Wang, Shaoying Ai, Christopher Nzediegwu, Jin Hyeob Kwak, Md Shahinoor Islam, Yichun Li, Scott X. Chang

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

77 Scopus citations

Abstract

The effectiveness of the modification of wheat straw biochar using FeCl₃ and HCl, alone or combined, on ammonium adsorption was evaluated using kinetic and isotherm models. The adsorption mechanisms were studied by comparative analysis of the surface properties of the biochars before and after ammonium adsorption. The results indicate that the modification methods enhanced the ammonium adsorption capacity by at least 14%, due to the increased [sbnd]OH and O[sbnd]C[dbnd]O functional groups and specific surface area, and increased Fe³⁺/Fe²⁺ redox coupling serving as an electron shuttle. It can be concluded that chemical modification of wheat straw biochars using FeCl₃ and HCl increased the effectiveness of biochars for the treatment of ammonium-contaminated wastewater.

Original language	English
Article number	123390
Journal	Bioresource Technology
Volume	309
DOIs	https://doi.org/10.1016/j.biortech.2020.123390
State	Published - 1 Aug 2020
Externally published	Yes

Keywords

Adsorption mechanism
Ammonium
Biochar
Chemical modification
Electron shuttle

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

UN SDGs

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

Access to Document

10.1016/j.biortech.2020.123390

Cite this

@article{7ef634b48df444209ad0dd59e63c340a,

title = "Carboxyl and hydroxyl groups enhance ammonium adsorption capacity of iron (III) chloride and hydrochloric acid modified biochars",

abstract = "The effectiveness of the modification of wheat straw biochar using FeCl3 and HCl, alone or combined, on ammonium adsorption was evaluated using kinetic and isotherm models. The adsorption mechanisms were studied by comparative analysis of the surface properties of the biochars before and after ammonium adsorption. The results indicate that the modification methods enhanced the ammonium adsorption capacity by at least 14%, due to the increased [sbnd]OH and O[sbnd]C[dbnd]O functional groups and specific surface area, and increased Fe3+/Fe2+ redox coupling serving as an electron shuttle. It can be concluded that chemical modification of wheat straw biochars using FeCl3 and HCl increased the effectiveness of biochars for the treatment of ammonium-contaminated wastewater.",

keywords = "Adsorption mechanism, Ammonium, Biochar, Chemical modification, Electron shuttle",

author = "Siyuan Wang and Shaoying Ai and Christopher Nzediegwu and Kwak, {Jin Hyeob} and Islam, {Md Shahinoor} and Yichun Li and Chang, {Scott X.}",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

month = aug,

day = "1",

doi = "10.1016/j.biortech.2020.123390",

language = "English",

volume = "309",

journal = "Bioresource Technology",

issn = "0960-8524",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Carboxyl and hydroxyl groups enhance ammonium adsorption capacity of iron (III) chloride and hydrochloric acid modified biochars

AU - Wang, Siyuan

AU - Ai, Shaoying

AU - Nzediegwu, Christopher

AU - Kwak, Jin Hyeob

AU - Islam, Md Shahinoor

AU - Li, Yichun

AU - Chang, Scott X.

PY - 2020/8/1

Y1 - 2020/8/1

N2 - The effectiveness of the modification of wheat straw biochar using FeCl3 and HCl, alone or combined, on ammonium adsorption was evaluated using kinetic and isotherm models. The adsorption mechanisms were studied by comparative analysis of the surface properties of the biochars before and after ammonium adsorption. The results indicate that the modification methods enhanced the ammonium adsorption capacity by at least 14%, due to the increased [sbnd]OH and O[sbnd]C[dbnd]O functional groups and specific surface area, and increased Fe3+/Fe2+ redox coupling serving as an electron shuttle. It can be concluded that chemical modification of wheat straw biochars using FeCl3 and HCl increased the effectiveness of biochars for the treatment of ammonium-contaminated wastewater.

AB - The effectiveness of the modification of wheat straw biochar using FeCl3 and HCl, alone or combined, on ammonium adsorption was evaluated using kinetic and isotherm models. The adsorption mechanisms were studied by comparative analysis of the surface properties of the biochars before and after ammonium adsorption. The results indicate that the modification methods enhanced the ammonium adsorption capacity by at least 14%, due to the increased [sbnd]OH and O[sbnd]C[dbnd]O functional groups and specific surface area, and increased Fe3+/Fe2+ redox coupling serving as an electron shuttle. It can be concluded that chemical modification of wheat straw biochars using FeCl3 and HCl increased the effectiveness of biochars for the treatment of ammonium-contaminated wastewater.

KW - Adsorption mechanism

KW - Ammonium

KW - Biochar

KW - Chemical modification

KW - Electron shuttle

UR - http://www.scopus.com/inward/record.url?scp=85083313295&partnerID=8YFLogxK

U2 - 10.1016/j.biortech.2020.123390

DO - 10.1016/j.biortech.2020.123390

M3 - Article

C2 - 32325379

AN - SCOPUS:85083313295

SN - 0960-8524

VL - 309

JO - Bioresource Technology

JF - Bioresource Technology

M1 - 123390

ER -

Carboxyl and hydroxyl groups enhance ammonium adsorption capacity of iron (III) chloride and hydrochloric acid modified biochars

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this