Comparative Study on the Adsorption Characteristics of Heavy Metal Ions by Activated Carbon and Selected Natural Adsorbents

Jiashi Li, Xiaoqiang Dong, Xiaofeng Liu (), Xin Xu, Wei Duan, Junboum Park, Lei Gao and Yisi Lu
Additional contact information
Jiashi Li: College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Xiaoqiang Dong: College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Xiaofeng Liu: College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Xin Xu: College of Construction Engineering, Jilin University, Jilin 130021, China
Wei Duan: College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Junboum Park: Department of Civil and Environmental Engineering, Seoul National University, Seoul 08826, Republic of Korea
Lei Gao: Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China
Yisi Lu: College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Sustainability, 2022, vol. 14, issue 23, 1-17

Abstract: In this study, adsorption of the heavy metal ions (Pb(II), Cu(II) and Cd(II)) from water by peanut shells (PS), sawdust (S) and commercial activated carbon (AC) were comparatively studied. Thus, the relationship between different adsorption parameters and different heavy metal ion removal rates was investigated. The adsorption capacity of the three adsorbents for heavy metal ions increased with an increase in temperature, pH value, contact time, adsorbent dosage, and heavy metal ion concentration, however, it decreased with an increase of adsorbent particle size. All the adsorption processes are better described by Langmuir isotherm or Freundlich isotherm. Thus, the results show good agreement with pseudo-second-order kinetics and the adsorption processes are spontaneous heat absorption processes. Herein, all adsorbents have higher affinity for Pb(II) ions, and hence possess higher removal rates. In addition, heavy metal ions were desorbed significantly at acidic conditions in the desorption experiments. The results demonstrate that PS can be used as a green adsorbent instead of AC for the adsorption of heavy metal ions from the water.

Keywords: adsorption; desorption; agricultural waste; natural adsorbents (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/2071-1050/14/23/15579/pdf (application/pdf)
https://www.mdpi.com/2071-1050/14/23/15579/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:14:y:2022:i:23:p:15579-:d:981732

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().