Efficient Removal 17-Estradiol by Graphene-Like Magnetic Sawdust Biochar: Preparation Condition and Adsorption Mechanism

Yahui Zhou, Shaobo Liu, Yunguo Liu, Xiaofei Tan, Ni Liu and Jun Wen
Additional contact information
Yahui Zhou: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Shaobo Liu: College of Architecture and Art, Central South University, Changsha 410083, China
Yunguo Liu: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Xiaofei Tan: College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Ni Liu: School of Tourism Management, Hunan University of Technology and Business, Changsha 410205, China
Jun Wen: College of Agriculture, Guangxi University, Nanning 530005, China

IJERPH, 2020, vol. 17, issue 22, 1-15

Abstract: The occurrence of environmental endocrine disrupting chemicals (EDCs) in aquatic environments has caused extensive concern. Graphene-like magnetic sawdust biochar was synthesized using potassium ferrate (K 2 FeO 4 ) to make activated sawdust biochar and applied for the removal of 17-estradiol (E2). The characterization showed that the surface morphology of five graphene-like magnetic sawdust biochars prepared with different preparation conditions were quite different. The specific surface area and pore structure increased with the increment of K 2 FeO 4 addition. The results have shown that graphene-like magnetic sawdust biochar (1:1/900 °C) had the best removal on E2. The experimental results indicated that pseudo-first-order kinetic model and the Langmuir model could describe the adsorption process well, in which the equilibrium adsorption capacity ( q e,1 ) of 1:1/900 °C were 59.18 mg·g −1 obtained from pseudo-first-order kinetic model and the maximum adsorption capacity ( q max ) of 1:1/900 °C were 133.45 mg·g −1 obtained from Langmuir model at 298K. At the same time, lower temperatures, the presence of humic acid (HA), and the presence of NaCl could be regulated to change the adsorption reaction in order to remove E2. Adsorption capacity was decreased with the increase of solution pH because pH value not only changed the surface charge of graphene-like magnetic sawdust biochar, but also affected the E2 in the water. The possible adsorption mechanism for E2 adsorption on graphene-like magnetic sawdust biochar was multifaceted, involving chemical adsorption and physical absorption, such as H-bonding, π-π interactions, micropore filling effects, and electrostatic interaction. To sum up, graphene-like magnetic sawdust biochar was found to be a promising absorbent for E2 removal from water.

Keywords: potassium ferrate; preparation; adsorption mechanism; carbonization; graphitization; water environment (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1660-4601/17/22/8377/pdf (application/pdf)
https://www.mdpi.com/1660-4601/17/22/8377/ (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:jijerp:v:17:y:2020:i:22:p:8377-:d:444037

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

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