Removal of heavy metals from wastewaters with biochar pyrolyzed from MgAl-layered double hydroxide-coated rice husk: Mechanism and application

被引:80
作者
Li, Anyu [1 ]
Zhang, Yue [1 ]
Ge, Wenzhan [1 ]
Zhang, Yutong [1 ]
Liu, Lihu [1 ]
Qiu, Guohong [1 ]
机构
[1] Huazhong Agr Univ, Key Lab Arable Land Conservat Middle & Lower Reac, Hubei Key Lab Soil Environm & Pollut Remediat,Col, Minist Agr & Rural Affairs,State Environm Protect, Wuhan 430070, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
Rice husk biochar; Layered double hydroxides; Adsorption; Heavy metals; Mechanisms; AQUEOUS-SOLUTION; FABRICATION; ADSORPTION; LDH;
D O I
10.1016/j.biortech.2021.126425
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
This study reports a MgAl-LDH rice husk biochar composite (MgAl-LDH@RHB) with a regular hydrotalcite structure synthesized by a simple hydrothermal method, which was then used to remove Cd(II) and Cu(II) from water. The influencing factors on the adsorption performance were determined through batch adsorption ex-periments, and the adsorption characteristics and cycling capacity were evaluated with eight models and adsorption-desorption experiments. The results showed that the adsorption of Cd(II) and Cu(II) by MgAl-LDH@RHB conformed to the Langmuir-Freundlich model and PSO kinetics model, indicating single-layer chemical adsorption. In addition, the experimental maximum adsorption capacities for Cd(II) and Cu(II) were 125.34 and 104.34 mg g(-1), respectively. The adsorption of Cd(II) and Cu(II) by MgAl-LDH@RHB was dominated by surface precipitation and ion exchange. The findings reveal the mechanism for the heavy metal removal by MgAl-LDH@RHB and provide a theoretical reference for agricultural waste disposal and water pollution control.
引用
收藏
页数:10
相关论文
共 48 条
  • [1] Enhanced adsorption of aqueous Pb(II) by modified biochar produced through pyrolysis of watermelon seeds
    Ahmed, Waqas
    Mehmood, Sajid
    Nunez-Delgado, Avelino
    Ali, Sehrish
    Qaswar, Muhammad
    Shakoor, Awais
    Mahmood, Mohsin
    Chen, Di-Yun
    [J]. SCIENCE OF THE TOTAL ENVIRONMENT, 2021, 784
  • [2] Modulating the redox cycles of homogenous Fe(III)/PMS system through constructing electron rich thiomolybdate centres in confined layered double hydroxides
    Ali, Jawad
    Shahzad, Ajmal
    Wang, Jia
    Ifthikar, Jerosha
    Lei, Wenli
    Aregay, Gebremedhin G.
    Chen, Zhulei
    Chen, Zhuqi
    [J]. CHEMICAL ENGINEERING JOURNAL, 2021, 408
  • [3] New insight into the removal of Cd(II) from aqueous solution by diatomite
    Chang, Jingjie
    Zhang, Jia
    Tan, Biqi
    Wang, Qun
    Liu, Nannan
    Xue, Qiang
    [J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2020, 27 (09) : 9882 - 9890
  • [4] PFAS removal by ion exchange resins: A review
    Dixit, Fuhar
    Dutta, Rahul
    Barbeau, Benoit
    Berube, Pierre
    Mohseni, Madjid
    [J]. CHEMOSPHERE, 2021, 272
  • [5] Relative distribution of Cd2+ adsorption mechanisms on biochars derived from rice straw and sewage sludge
    Gao, Li-Yang
    Deng, Jin-Huan
    Huang, Guo-Fu
    Li, Kai
    Cai, Kun-Zheng
    Liu, Yan
    Huang, Fei
    [J]. BIORESOURCE TECHNOLOGY, 2019, 272 : 114 - 122
  • [6] High-efficiency removal capacities and quantitative sorption mechanisms of Pb by oxidized rape straw biochars
    Gao, Ruili
    Xiang, Lin
    Hu, Hongqing
    Fu, Qingling
    Zhu, Jun
    Liu, Yonghong
    Huang, Guoyong
    [J]. SCIENCE OF THE TOTAL ENVIRONMENT, 2020, 699
  • [7] Arsenic adsorption on layered double hydroxides biochars and their amended red and calcareous soils
    Gao, Xing
    Peng, Yutao
    Guo, Lili
    Wang, Qiong
    Guan, Chung-Yu
    Yang, Fan
    Chen, Qing
    [J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT, 2020, 271
  • [8] Photocatalytic degradation of gemifloxacin antibiotic using Zn-Co-LDH@biochar nanocomposite
    Gholami, Peyman
    Khataee, Alireza
    Soltani, Reza Darvishi Cheshmeh
    Dinpazhoh, Laleh
    Bhatnagar, Amit
    [J]. JOURNAL OF HAZARDOUS MATERIALS, 2020, 382
  • [9] Rapid in situ synthesis of MgAl-LDH on η-Al2O3 for efficient hydrolysis of urea in wastewater
    Guo, Chenyuan
    Shen, Shuguang
    Li, Meina
    Wang, Ying
    Li, Jing
    Xing, Yuanquan
    Wang, Cui
    Pan, Huajie
    [J]. JOURNAL OF CATALYSIS, 2021, 395 : 54 - 62
  • [10] Adsorption performance and mechanistic study of heavy metals by facile synthesized magnetic layered double oxide/carbon composite from spent adsorbent
    Hou, Tailei
    Yan, Liangguo
    Li, Jing
    Yang, Yanting
    Shan, Lixin
    Meng, Xin
    Li, Xuguang
    Zhao, Yanxia
    [J]. CHEMICAL ENGINEERING JOURNAL, 2020, 384