首页|The energy-free purification of trace thallium(Ⅰ)-contaminated potable water using a high-selective filter paper with multi-layered Prussian blue decoration

The energy-free purification of trace thallium(Ⅰ)-contaminated potable water using a high-selective filter paper with multi-layered Prussian blue decoration

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Thallium is a highly toxic metal,and trace amount of thallium(I)(T1+)in potable water could cause a severe water crisis,which arouses the exploitation of highly-effective technology for purification of T1+conta-minated water.This report proposes the multi-layered Prussian blue(PB)-decorated composite membranes(PBx@PDA/PEI-FP)based on the aminated filter papers for T1+ uptake.Extensively characterization by Fourier transform infrared spectrometer-attenuated total reflec-tance,scanning electron microscope,thermogravimetric analysis,X-ray photoelectron spectroscopy and X-ray diffraction were performed to confirm the in situ growth of cubic PB crystals on filter paper membrane surfaces via the aminated layers,and the successful fabrication of multi-layered PB overcoats via the increasing of aminated layers.The effect of PB layers on T1+ removal by PBx@PDA/PEI-FP from simulated drinking water was evaluated as well as the influence of different experimental conditions.A trade-off between PB decoration layer number and PB distribution sizes is existed in T1+ uptake by PBx@PDA/PEI-FP.The double-layered PB2@PDA/PEI-FP membrane showed the maximum sorption capacity,but its T1+ uptake performance was weakened by the acid,coexisting ions(K+and Na+)and powerful operation pressure,during filtrating a large volume of low-concentrated T1+ -containing water.However,the negative effect of coexisting ions on the T1+ uptake could be effectively eliminated in weak alkaline water,and the T1+removal was increased up to 100％without any pressure driving for PB2@PDA/PEI-FP membrane.Most importantly,PB2@PDA/PEI-FP displayed the high-efficiency and high-selectivity in purifying the T1+ -spiked Pearl River water,in which the residual T1+ in filtrate was less than 2 μg·L-1 to meet the drinking water standard of United States Environmental Protection Agency.This work provides a feasible avenue to safeguard the drinking water in remote and underdeveloped area via the energy-free operation.

membrane adsorptionPrussian blueenergy-free filtrationpotable watertrace thallium(Ⅰ)

Jiangyan Lu、Zhu Xiong、Yuhang Cheng、Qingwu Long、Kaige Dong、Hongguo Zhang、Dinggui Luo、Li Yu、Wei Zhang、Gaosheng Zhang

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Key Laboratory for Water Quality and Conservation of the Pearl River Delta(Ministry of Education),School of Environmental Science and Engineering,Guangzhou University,Guangzhou 510006,China

College of Light Chemical Industry and Materials Engineering,Shunde Polytechnic,Foshan 528333,China

current study was financially supported by the National Natural Science Foundation of Chinacurrent study was financially supported by the National Natural Science Foundation of ChinaGuangdong Basic and Applied Basic Research FoundationGuangdong Basic and Applied Basic Research FoundationScience and Technology Program of GuangzhouProject of Young Innovative Talents in Colleges and Universities of Guangdong ProvinceOutstanding Youth Project of Guangdong Natural Science FoundationGuangzhou Science and Technology ProjectGuangzhou Science and Technology ProjectResearch Project of Guangzhou University

22006026522700012023A15150125062019A15151105462021020801602019KQNCX1112022B1515020030202201020530202201020200YJ2023026

2024

10.1007/s11705-023-2379-8

化学科学与工程前沿
高等教育出版社

化学科学与工程前沿

CSTPCDEI
影响因子：0.172
ISSN：2095-0179
年,卷(期)：2024.18(2)
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