Selective Tl(I) Removal by Prussian Blue–Zero Valent Iron Nanoparticles
Source abstract
Abstract
Thallium (Tl) is a trace metal with high toxicity and exists in the aquatic environment as Tl(III) and Tl(I). Tl(I) is a major species in industrial wastewater and natural water, which has high solubility, stability, and mobility and is difficult to remove. In this study, Prussian blue–zerovalent iron nanoparticles (PB-nZVI) were successfully prepared at room temperature. The performance of PB-nZVI in removing Tl(I) was studied and compared with PB and nZVI. The experimental results showed that PB-nZVI can remove Tl(I) efficiently (>97%) in a pH range of 3–9, while the highest removal rates of PB and nZVI for Tl(I) were only 83.8% and 53.1% (pH = 9), respectively. Additionally, the variation of Tl(I) removal efficiency in different relative parameters has been studied, such as Tl(I) initial concentration, dosage of absorbent materials, and coexisting cations (K +, Ni 2+, Pb 2+, Zn 2+, Ca 2+, Mg 2+, Cd 2+, and Cu 2+ ). PB-nZVI showed extremely high selectivity for Tl(I), and the efficiency of Tl(I) removal was slightly affected by the coexisting cations with 100 and 1000 mg/L. However, the Tl(I) removal by PB and nZVI was significantly inhibited under identical conditions. The involved mechanisms are as follows: adsorption, precipitation, and ion exchange. The synergistic effect of PB and nZVI enables PB-nZVI to efficiently remove thallium from wastewater.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Thallium and Germanium Studies · Environmental remediation with nanomaterials · Chromium effects and bioremediation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling
South China University of Technology
The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education)
Guangdong Water Resources Engineering Research Center (Guangdong) Co., Ltd
Guangdong Yue Gang Water Supply Co., Ltd
Institute of Environmental Engineering, School of Metallurgy and Environment
Central South University
Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution
Funding
National Key Research and Development Program of China · National Natural Science Foundation of China
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