Controllable synthesis of phenolic resin-based carbon nanospheres for simultaneous detection of heavy-metal ions

Author(s):  
Yuzhi Liu ◽  
Wei Xiong
2021 ◽  
Vol 56 (13) ◽  
pp. 8172-8185
Author(s):  
Manh B. Nguyen ◽  
Dau Thi Ngoc Nga ◽  
Vu Thi Thu ◽  
Benoît Piro ◽  
Thuan Nguyen Pham Truong ◽  
...  

2017 ◽  
Vol 100 (2) ◽  
pp. 560-565 ◽  
Author(s):  
Jibran Iqbal ◽  
Yiping Du ◽  
Fares Howari ◽  
Mahmoud Bataineh ◽  
Nawshad Muhammad ◽  
...  

Abstract Sensitive detection of heavy metal ions in water is of great importance considering the effects that heavy metals have on public health. A developed fluidized bed enrichment technique was used to concentrate and detect low concentrations of Cu2+, Co2+, and Ni2+ in water samples by near-IR diffuse reflectance (NIDR) spectroscopy (NIDRS) directly without using any chemicals or reagents. The NIDR spectraof adsorbent were measured on-line, and quantitative detection was achieved by applying a built partial least-squares chemometric model. Sensitivity and accuracy was improved significantly because large-volume mixture solutions were used in the enrichment process. Root mean square error of cross-validation values for Cu2+, Co2+, and Ni2+ were 0.29, 0.41, and 0.35 μg/mL, respectively, with mean relative error values in the acceptable range of 6.56–10.27%. This study confirms the potential application of fluidized bed enrichment combined with NIDRS and chemometrics for the simultaneous detection of trace heavy metal ions in water, with low relative error.


Author(s):  
Xiaoyun Xu ◽  
Xiaoyi Lv ◽  
Fei Tan ◽  
Yanping Li ◽  
Chao Geng ◽  
...  

Abstract An efficient and sensitive electrochemical sensor for simultaneous detection of heavy metal ions was developed based on furfural/reduced graphene oxide composites (FF/RGO). The preparation of FF/RGO were performed through a one-step high-pressure assisted hydrothermal treatment, which is recommended as a green, convenient, and efficient way for the reduction of graphene oxide and the production of FF/RGO composites. RGO not only serves as the skeleton for furfural loading but also improves the conductivity of the composites in the matrix. FF/RGO with large specific surface area and abundant oxygen-containing functional groups was used to provide more binding sites for the effificient adsorption of heavy-metal ions due to the interaction between hydrophilic groups (-COOH, -OH, and -CHO) and metal cations. The developed sensor showed identifiable electrochemical response toward the heavy metal ions separately and simultaneously, exhibiting superior stability, outstanding sensitivity, selectivity and excellent analytical performance. Impressively, the sensor developed in this experiment has been successfully applied to the simultaneous determination of various heavy metal ions in actual samples, which has definitely exhibited a promising prospect in practical application.


2019 ◽  
Vol 26 (12) ◽  
pp. 12379-12398 ◽  
Author(s):  
Jelena D. Rusmirović ◽  
Nina Obradović ◽  
Jovana Perendija ◽  
Ana Umićević ◽  
Ana Kapidžić ◽  
...  

2012 ◽  
Vol 36 (1) ◽  
pp. 174-178 ◽  
Author(s):  
Changlong Hao ◽  
Liguang Xua ◽  
Changrui Xing ◽  
Hua Kuang ◽  
Libing Wang ◽  
...  

RSC Advances ◽  
2019 ◽  
Vol 9 (30) ◽  
pp. 17325-17334 ◽  
Author(s):  
Wei Yi ◽  
Zihua He ◽  
Junjie Fei ◽  
Xiaohua He

A novel electrochemical sensor with high stability and good reproducibility for the simultaneous detection of heavy metal ions was prepared by using PGA/GO to modify the GCE, showing high sensitivity of superior to most of the reported values.


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