In wastewater, heavy metal Hg causes serious harm to ecology, so it needs to be removed. In this paper, a novel MOF adsorbent (UiO-66-QU) was prepared by modifying UiO-66-NH with 4-quinolinecarboxaldehyde, which was used to selectively remove Hg(II) from water. The adsorbent was characterized using Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), zeta potentiometer, and X-ray photoelectron spectroscopy (XPS). In order to investigate the Hg(II) adsorption performance of UiO-66-QU, the effect of time, initial concentration, pH, and temperature were carried out. Langmuir model fitting shows that the maximum adsorption capacity of UiO-66-QU for Hg(II) is 556 mg/g at 298 K. The experimental results show that UiO-66-QU has better Hg(II) adsorption capacity than UiO-66-NH. The isotherm is in accordance with pseudo-second-order models. It is indicated that the adsorption process is mainly monolayer chemical adsorption. The thermodynamic parameters also indicate that the adsorption process is spontaneous and endothermic. It has excellent reusability and selectivity. XPS and the zeta potential showed that the adsorption mechanism was the complex reaction of Hg(II) with nitrogenous group. Therefore, the adsorbent has potential application prospects in removal of Hg(II) from wastewater.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s11356-022-22276-6 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Mercury Adsorption by Ca-Based Shell-Type Polymers Synthesized by Self-Assembly Mineralization.
Polymers (Basel)
December 2024
State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Adsorption is one of the most promising strategies for heavy metal removal. For Hg(II) removal, mineralized Ca-based shell-type self-assembly beads (MCABs) using alginate as organic polymer template were synthesized in this work. The adsorbent preparation consists of gelation of a Ca-based spherical polymer template (CAB) and rate-controlled self-assembly mineralization in bicarbonate solution with various concentrations.
View Article and Find Full Text PDFThiolated non-conjugated nano polymer network for advanced mercury removal from water.
J Hazard Mater
December 2024
Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing 400715, China. Electronic address:
Developing advanced adsorbents for selectively deducing mercury (Hg) in water to one billionth level is of great significance for public health and ecological security, but achieving the balance among efficiency, cost and environmental friendliness of adsorbents still faces enormous challenges. Herein, we present a high thiol content non-conjugated nano polymer network (PVB-SH) through simple microemulsion polymerization for efficient Hg ion (Hg(II)) removal. The PVB-SH is prepared by conventional commercial reagents and does not consume toxic organic solutions.
View Article and Find Full Text PDFChitosan-based porous composites embedded with molybdenum disulfide nanosheets for removal of mercury from wastewater.
Int J Biol Macromol
January 2025
Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China. Electronic address:
Mercury-containing wastewater presents a significant environmental threat due to its high toxicity. Therefore, the urgent removal of mercury-laden wastewater is essential to protect ecosystems and public health. In this study, molybdenum disulfide (MoS) nanosheets modified with a silane coupling agent (designated as MS) were crosslinked with natural polymer chitosan (CS) rich in -NH and - OH groups to develop a highly efficient and environmentally friendly MoS-functionalized three-dimensional reticulated porous materials (denoted as MS/CTS) composite adsorbent.
View Article and Find Full Text PDFAmino-enriched Zn-MOFs with self-reduction for energy-free simultaneous removal and electrochemical detection of heavy metal ions in the aquatic environment.
Anal Chim Acta
January 2025
School of Agricultural Engineering, Jiangsu University, 212013, Zhenjiang, PR China; School of Chemistry and Chemical Engineering, Jiangsu University, 212013, Zhenjiang, PR China; Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 266042, Qingdao, PR China. Electronic address:
Background: Heavy metal pollution is a global environmental problem. Self-reduction strategy has garnered attention in adsorption and electrochemical detection of heavy metal ions due to their operational simplicity and elimination of the need for external electrodeposition steps. Therefore, it is crucial to integrate self-reduction-based adsorption with electrochemical detection.
View Article and Find Full Text PDFPreparation and Adsorption Properties of a Three-Dimensional Superhydrophilic Mercury-Ion-Imprinted Polymer with Dual Recognition Site Based on MoS/SBA-15.
Inorg Chem
December 2024
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
Water pollution resulting from Hg(II) ions has garnered significant global concern for public health. The flexibility and simplicity of design, cost savings, and ease of operation with adaptive designs provide adsorption with a considerable advantage over other processes. However, MoS is hydrophobic in nature, which limits its efficiency in the removal of Hg(II) ions from water.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!