The peroxidase-like activity-based colorimetric sensor array of noble metal nanozymes to discriminate heavy metal ions

The Analyst ◽  
2021 ◽  
Author(s):  
Hamada A. A. Noreldeen ◽  
Liu Yang ◽  
Xiao-Yun Guo ◽  
Shao-Bin He ◽  
Hua-Ping Peng ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Noble Metal ◽  
Heavy Metal Ions ◽  
Sensor Array ◽  
Colorimetric Sensor ◽  
Human Beings ◽  
Colorimetric Sensor Array ◽  
Life Threatening ◽  
Colorimetric Sensors

Heavy metal ions (HMIs) including Cu2+, Ag+, Cd2+, Hg2+, and Pb2+ from the environment pose threats to human beings and therefore cause a series of life-threatening diseases. Thus, colorimetric sensors...

Heavy metal ion discrimination based on distinct interaction between single-stranded DNA and methylene blue

2019 ◽  
Vol 11 (1) ◽  
pp. 17-20 ◽  
Author(s):  
Li Li ◽  
Bing Liu ◽  
Zhengbo Chen
Keyword(s):  
Heavy Metal ◽  
Methylene Blue ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Sensor Array ◽  
Colorimetric Sensor ◽  
Heavy Metal Ion ◽  
Single Stranded Dna ◽  
Colorimetric Sensor Array

In this work, we developed a facile and extensible colorimetric sensor array based on different interactions between methylene blue (MB) and single-stranded DNA (ssDNA) for the discrimination of heavy metal ions.

Robust transparent mesoporous silica membranes as matrices for colorimetric sensors

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 16549-16553 ◽  
Author(s):  
Donghun Kim ◽  
Bradley F. Chmelka
Keyword(s):  
Heavy Metal ◽  
Mesoporous Silica ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Colorimetric Detection ◽  
High Surface ◽  
Silica Membranes ◽  
Surface Areas ◽  
Functionalized Mesoporous Silica ◽  
Colorimetric Sensors

Transparent functionalized mesoporous silica membranes have been prepared with high surface areas (∼500 m2 g−1) that exhibit high sensitivities for colorimetric detection and sensing of dilute heavy-metal ions (e.g., Pb2+).

Differentiation of heavy metal ions by fluorescent quantum dot sensor array in complicated samples

2019 ◽  
Vol 295 ◽  
pp. 110-116 ◽  
Author(s):  
Zhe Jiao ◽  
Pengfei Zhang ◽  
Hongwei Chen ◽  
Cong Li ◽  
Lina Chen ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Quantum Dot ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Sensor Array

scholarly journals Heavy Non-ferrous Metals Adsorption from Water Solutions with Granular Filtering Materials Based on Silicon Rock

2018 ◽  
Author(s):  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Ph Value ◽  
Salt Content ◽  
Human Beings ◽  
Waste Waters ◽  
Metal Compounds ◽  
Physical Chemical ◽  
Siliceous Rocks

Water factor plays an important role in formation of healthy environment for human beings. Due to unfavorable anthropogenic impact upon environment certain surface and groundwater water supply sources are contaminated with heavy metal compounds. Clints (siliceous rocks) are considered the most promising materials for the natural and waste waters treatment from such ingredients. The paper presents the results of the siliceous rocks’ physical/chemical and operational properties studying. It has been shown that these siliceous rocks satisfy all requirements to filtering materials. Methods of physical/chemical analysis were applied for studying the adsorption processes nature. It was for the first time stated (with methods of potentiometric titration and infra-red spectroscopy) that siliceous rocks included the fixed functional ion-exchange groups in their composition and were subacid cationits. Beside chemical adsorption heavy metal ions interact with siliceous rocks due to the action of their physical nature forces. Physical adsorption contributes the most in the heavy metal compounds up-taking by filtering materials, this is supported by the fact of low values of the process activation energy: from 3 to 8 kJ/gram-molecule. Parameters of the process of heavy metal ions adsorption with siliceous rocks in static and dynamic conditions have been calculated in accordance with the experimental results. Influence of salt content and the liquid phase pH value on the adsorption process has been stated. Optimal conditions for the worked siliceous rocks regeneration have been determined. New data on heavy metals cations adsorption with nuclear filtering materials confirm principal possibility of their use for natural and waste waters treatment.

scholarly journals pH-Regulated Carbon Dots Fluorescence Sensor Array Detection of Multiple Heavy Metal Ions Under Stepwise Prediction

2022 ◽  
Author(s):  
Zijun Xu ◽  
Yuying Liu ◽  
Jiao Chen ◽  
Xiyuan Wang ◽  
Hao Liu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Sensor Array ◽  
Chelating Agent ◽  
Fluorescence Sensor ◽  
Array Detection ◽  
Multiple Heavy Metals

Abstract As a large amount of heavy metals leaches into water sources from industrial effluents, heavy metal pollution has become an important factor affecting water quality. To enable the detection of multiple heavy metals, we constructed a pH-regulation fluorescence sensor array. Firstly, by adding a metal chelating agent as receptor, metal ions and carbon quantum dots (CDs) were connected to distinguish between Cr6+, Fe3+, Fe2+, and Hg2+ ions. Thus, the lack of affinity between the indicator functional groups and the analyte was solved. Secondly, by adjusting the pH environment of the solution system, an economical and simple array sensing platform is established, which effectively simplified the array construction. In this study, the SX-model was used in the field of fluorescence sensor array detection for metal ion recognition. Based on the strategy of stepwise prediction, combined with the classification and concentration models, the bottleneck of the unified model in previous studies was broken. This sensor array demonstrated sensitive detection of four heavy metal ions within a concentration range from 1 to 50 µM, with an accuracy of 95.45%. Moreover, it displayed the ability to efficiently identify binary mixed samples with an accuracy of 95.45%. Furthermore, metal ions in 15 real samples (lake water) were effectively discriminated with 100% accuracy. A chelating agent was used to improve the sensitivity of heavy metal ion detection and eventually led to high-precision prediction using the SX-model.

A metal ion-regulated colorimetric sensor array: discriminating Chinese Baijiu from other beverages

2019 ◽  
Vol 11 (41) ◽  
pp. 5274-5281 ◽  
Author(s):  
Jiawei Li ◽  
Ping Yang ◽  
Jing Zhang ◽  
Zhengfan Shui ◽  
Danqun Huo ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Sensor Array ◽  
Colorimetric Sensor ◽  
Correct Classification ◽  
Au Nps ◽  
Colorimetric Sensor Array

We provide a Baijiu colorimetric sensor array based on metal ions regulated Au NPs aggregation, which can do a correct classification of 16 Baijius with different flavor types.

Enhancement of sensitivity of paper-based sensor array for the identification of heavy-metal ions

2013 ◽  
Vol 780 ◽  
pp. 74-80 ◽  
Author(s):  
Liang Feng ◽  
Xiao Li ◽  
Hui Li ◽  
Wei Yang ◽  
Liang Chen ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Sensor Array
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