Fabrication of a corn stalk derived cellulose-based bio-adsorbent to remove Congo red from wastewater: Investigation on its ultra-high adsorption performance and mechanism

被引：13

作者：

Wang, Rong ^{[1
]}

Liu, Yi ^{[1
]}

Lu, Yanhui ^{[1
]}

Liang, Shuhuai ^{[1
]}

Zhang, Yafang ^{[1
]}

Zhang, Jian ^{[1
]}

Shi, Ronghui ^{[2
]}

Yin, Wang ^{[3
,4
]}

机构：

[1] Nanchang Univ, Environm Testing Ctr, Sch Chem & Chem Engn, Key Lab Poyang Lake Environm & Resource Utilizat,M, Nanchang 330031, Peoples R China

[2] Fujian Univ Technol, Fuzhou Green Chem & Cleaner Prod Ind Technol Innov, Chem Safety Inst, Fuzhou 350118, Peoples R China

[3] Fuzhou Univ, Fujian Univ Engn Res Ctr React Distillat Technol, Fuzhou Univ, Coll Chem Engn,Int Joint Lab Thermochem Convers Bi, Fuzhou 350108, Fujian, Peoples R China

[4] Fuzhou Univ, Fuzhou Univ Int Joint Lab Thermochem Convers Bioma, Coll Chem Engn, Fuzhou 350108, Fujian, Peoples R China

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2023年 / 241卷

关键词：

Cellulose-based; Bio-absorbent; Quantitative removal; Congo red; Ultra-high removal; REACTIVE BLACK 5; AQUEOUS-SOLUTIONS; EFFICIENT REMOVAL; MICROCRYSTALLINE CELLULOSE; GRAPHENE OXIDE; DYE ADSORPTION; ANIONIC DYES; MEMBRANES; NANOFIBERS; KINETICS;

D O I：

10.1016/j.ijbiomac.2023.124545

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

A cellulose-based bio-absorbent with various and plenty of amino groups was successfully prepared from corn stalk to achieve quantitative removal of Congo red from wastewater with wide pH values (5 <= pH <= 10). The maximum removal amount was 8.0 mmol center dot g(-1) (5572 mg center dot g(-1)) under pH = 6.0 and 45 degrees C, which was obviously higher than reported absorbents. Investigation on dynamic adsorption and recyclability in authentic wastewater found that the removal efficiency of Congo red was >98 % within 180 min and decreased slightly in industrial water after five cycles, denoting this adsorbent with great potential for environmental application. The characterization results proved that 7.58 mmol center dot g(-1) of different amino groups (-NH2, -NH- and -NR2) were introduced on adsorbent surface by two steps of modification and were the major functional groups for adsorption of Congo red. The inferred adsorption mechanism revealed that Congo red could be adsorbed equivalently on the amino groups by strong electrostatic interactions or hydrogen bonds. Different amino groups played different roles in adsorption due to great differences in protonation ability in 5 <= pH <= 10. The study was expected to highefficiently remove Congo red from acidic or alkaline wastewater, and offered an alternative strategy for biowaste treatment of corn stalks in a high value-added manner.

引用

页数：10