1
|
Eikelboom M, Wang Y, Portlock G, Gourain A, Gardner J, Bullen J, Lewtas P, Carriere M, Alvarez A, Kumar A, O'Prey S, Tölgyes T, Omanović D, Bhowmick S, Weiss D, Salaun P. Voltammetric determination of inorganic arsenic in mildly acidified (pH 4.7) groundwaters from Mexico and India. Anal Chim Acta 2023; 1276:341589. [PMID: 37573093 DOI: 10.1016/j.aca.2023.341589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 06/19/2023] [Accepted: 07/04/2023] [Indexed: 08/14/2023]
Abstract
Routine monitoring of inorganic arsenic in groundwater using sensitive, reliable, easy-to-use and affordable analytical methods is integral to identifying sources, and delivering appropriate remediation solutions, to the widespread global issue of arsenic pollution. Voltammetry has many advantages over other analytical techniques, but the low electroactivity of arsenic(V) requires the use of either reducing agents or relatively strong acidic conditions, which both complicate the analytical procedures, and require more complex material handling by skilled operators. Here, we present the voltammetric determination of total inorganic arsenic in conditions of near-neutral pH using a new commercially available 25 μm diameter gold microwire (called the Gold Wirebond), which is described here for the first time. The method is based on the addition of low concentrations of permanganate (10 μM MnO4-) which fulfils two roles: (1) to ensure that all inorganic arsenic is present as arsenate by chemically oxidising arsenite to arsenate and, (2) to provide a source of manganese allowing the sensitive detection of arsenate by anodic stripping voltammetry at a gold electrode. Tests were carried out in synthetic solutions of various pH (ranging from 4.7 to 9) in presence/absence of chloride. The best response was obtained in 0.25 M chloride-containing acetate buffer resulting in analytical parameters (limit of detection of 0.28 μg L-1 for 10 s deposition time, linear range up to 20 μg L-1 and a sensitivity of 63.5 nA ppb-1. s-1) better than those obtained in acidic conditions. We used this new method to measure arsenic concentrations in contrasting groundwaters: the reducing, arsenite-rich groundwaters of India (West Bengal and Bihar regions) and the oxidising, arsenate-rich groundwaters of Mexico (Guanajuato region). Very good agreement was obtained in all groundwaters with arsenic concentrations measured by inductively coupled plasma-mass spectrometry (slope = +1.029, R2 = 0.99). The voltammetric method is sensitive, faster than other voltammetric techniques for detection of arsenic (typically 10 min per sample including triplicate measurements and 2 standard additions), easier to implement than previous methods (no acidic conditions, no chemical reduction required, reproducible sensor, can be used by non-voltammetric experts) and could enable cheaper groundwater surveying campaigns with in-the-field analysis for quick data reporting, even in remote communities.
Collapse
Affiliation(s)
- Martijn Eikelboom
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, L69 3GP, Liverpool, UK.
| | - Yaxuan Wang
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, L69 3GP, Liverpool, UK
| | - Gemma Portlock
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, L69 3GP, Liverpool, UK
| | - Arthur Gourain
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, L69 3GP, Liverpool, UK
| | - Joseph Gardner
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, L69 3GP, Liverpool, UK
| | - Jay Bullen
- Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Paul Lewtas
- School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup, Western Australia, 6027, Australia
| | - Matthieu Carriere
- Caminos de Agua, José María Correa 23A, Colonia Santa Cecilia, 37727, San Miguel de Allende, Gto, Mexico
| | - Alexandra Alvarez
- Caminos de Agua, José María Correa 23A, Colonia Santa Cecilia, 37727, San Miguel de Allende, Gto, Mexico
| | - Arun Kumar
- Mahavir Cancer Sansthan and Research Centre, Phulwarisharif, Patna, 801505, Bihar, India
| | | | | | - Dario Omanović
- Division for Marine and Environmental Research, Ruđer Bošković Institute, Bijenička 54, 10000, Zagreb, Croatia
| | - Subhamoy Bhowmick
- Kolkata Zonal Center CSIR-National Environmental Engineering Research Institute (NEERI), Kolkata, West Bengal, 700107, India
| | - Dominik Weiss
- Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Pascal Salaun
- School of Environmental Sciences, University of Liverpool, 4 Brownlow Street, L69 3GP, Liverpool, UK.
| |
Collapse
|
2
|
Guo S, Jiang M, Lin J, Khan NI, Owens G, Chen Z. Arsenic speciation, oxidation and immobilization in an unsaturated soil in the presence of green synthesized iron oxide nanoparticles and humic acid. CHEMOSPHERE 2023; 311:137198. [PMID: 36356806 DOI: 10.1016/j.chemosphere.2022.137198] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 10/18/2022] [Accepted: 11/06/2022] [Indexed: 06/16/2023]
Abstract
While the availability of arsenic (As) in soil is well known to be highly correlated with the presence of iron (Fe) oxides and humic acid (HA) in the soil, the relationship between Fe oxides and HA and As species in the soil is less well understood. In this study, As speciation in an unsaturated soil in the presence of external HA and green synthesized Fe oxide nanoparticles (FeNPs) showed that As(V) was mainly distributed to the specifically-bound (F2), amorphous and poorly-crystalline hydrous oxides of Fe, Al (F3) and the well-crystallized hydrous oxides of Fe and Al (F4). While As(III). This was the major component in unsaturated soil, and was mainly distributed to F4 and the residual fraction (F5). As bound to F3 and F5 was most sensitive to the addition of HA and FeNPs, while HA/FeNPs treatment increased the F3-bound As(V); however, it decreased the F5-bound As(III). Nonetheless the effect of HA on As is completely different to the HA/FeNPs treatment. The increase of As(V) in F3 resulted from F5-bound As(III) oxidation when treated by HA/FeNPs. Cyclic voltammetry confirmed that HA and Fe3+/Fe2+ redox enhanced As(III) oxidation, while FTIR revealed that HA-bound As(III) was the least available fraction in the soil. Finally, a mechanism involving a combination of HA and FeNPs was proposed for explaining the redistribution of As species in the soil.
Collapse
Affiliation(s)
- Shurui Guo
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou, 350007, Fujian Province, China
| | - Mingqin Jiang
- Fujian Inspection and Research Institute for Product Quality, Fuzhou, 350002, Fujian Province, China
| | - Jiajiang Lin
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou, 350007, Fujian Province, China.
| | - Nasreen Islam Khan
- Environmental Contaminants Group, Future Industries Institute, University of South Australian, Mawson Lakes, SA, 5095, Australia
| | - Gary Owens
- Environmental Contaminants Group, Future Industries Institute, University of South Australian, Mawson Lakes, SA, 5095, Australia
| | - Zuliang Chen
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou, 350007, Fujian Province, China.
| |
Collapse
|
3
|
Electrochemically decorated gold nanoparticles on CVD graphene ChemFET sensor for the highly sensitive detection of As(III). Microchem J 2022. [DOI: 10.1016/j.microc.2022.108376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
4
|
Hu Q, Wang R, Gan Y, Zhang Y, Bao H, Zhang L, Qu G, Wang T. Chlorinated disinfection by-product formation during DOM removal by discharge plasma: Insights into DOC structure alterations. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121183] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
5
|
Sultan S, Shah A, Khan B, Nisar J, Shah MR, Ashiq MN, Akhter MS, Shah AH. Calix[4]arene Derivative-Modified Glassy Carbon Electrode: A New Sensing Platform for Rapid, Simultaneous, and Picomolar Detection of Zn(II), Pb(II), As(III), and Hg(II). ACS OMEGA 2019; 4:16860-16866. [PMID: 31646232 PMCID: PMC6796916 DOI: 10.1021/acsomega.9b01869] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
The glassy carbon electrode was fabricated with multifunctional bis-triazole-appended calix[4]arene and then used for the simultaneous detection of Zn(II), Pb(II), As(III), and Hg(II). Before applying the square-wave anodic stripping voltammetry, the sensitivity and precision of the modified electrode was assured by optimizing various conditions such as the modifier concentration, pH of the solution, deposition potential, accumulation time, and supporting electrolytes. The modified glassy carbon electrode was found to be responsive up to picomolar limits for the aforementioned heavy metal ions, which is a concentration limit much lower than the threshold level permitted by the World Health Organization. Importantly, the designed sensing platform showed anti-interference ability, good stability, repeatability, reproducibility, and applicability for the detection of multiple metal ions. The detection limits obtained for Zn(II), Pb(II), As(III), and Hg(II) are 66.3, 14.6, 71.9, and 28.9 pM, respectively.
Collapse
Affiliation(s)
- Sundus Sultan
- Department of Chemistry, Quaid-i-Azam University, 45320 Islamabad, Pakistan
| | - Afzal Shah
- Department of Chemistry, Quaid-i-Azam University, 45320 Islamabad, Pakistan
- Department of Chemistry, College of Science, University of Bahrain, Sakhir 32038, Bahrain
| | - Burhan Khan
- H.E.J Research Institute of Chemistry, International
Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan
| | - Jan Nisar
- National
Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan
| | - Muhammad Raza Shah
- H.E.J Research Institute of Chemistry, International
Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan
| | - Muhammad Naeem Ashiq
- Institute
of Chemical Sciences, Bahauddin Zakaryia
University, Multan 6100, Pakistan
| | - Mohammad Salim Akhter
- Department of Chemistry, College of Science, University of Bahrain, Sakhir 32038, Bahrain
| | - Aamir Hassan Shah
- CAS Laboratory of Nanosystem
and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| |
Collapse
|
6
|
Wang M, Zhao Z, Zhang Y. Disposal of Fenton sludge with anaerobic digestion and the roles of humic acids involved in Fenton sludge. WATER RESEARCH 2019; 163:114900. [PMID: 31362207 DOI: 10.1016/j.watres.2019.114900] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 07/17/2019] [Accepted: 07/22/2019] [Indexed: 06/10/2023]
Abstract
Fenton sludge (FS) generated from Fenton process with high contents of iron and organic contaminants is regarded as a hazardous waste that requires to be properly disposed. Considering that Fe(III) compounds could stimulate dissimilatory iron reduction (DIR) and enrich iron reducing bacteria (IRB) that utilized Fe(III) as electron acceptor to oxidize organic matters, FS was introduced in anaerobic digestion (AD) reactors for treating wastewater meanwhile disposing FS. Results showed that methane production and organic matters removal significantly increased with dosing FS from 0 to 2.4 g. Also, a majority of organic matters involved in FS was mineralized, including 38.5% of PAHs removal. Humic acids (HA) with redox-activity involved in FS might affect efficiency of DIR. After extracting HA from FS, the rate and the extent of Fe(III) reduction of FS decreased by 33.2% and 13.9%, respectively. Together with analysis of the electron exchange capacity of HA, it suggested that the HA involved in FS might serve as an electron shuttle to effectively promote DIR. The increase of sludge conductivity and the enrichment of IRBs in microbial communities with dosage of FS were in agreement with the above results.
Collapse
Affiliation(s)
- Mingwei Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering Dalian University of Technology, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Zhiqiang Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering Dalian University of Technology, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Yaobin Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering Dalian University of Technology, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
| |
Collapse
|
7
|
Babar NUA, Joya KS, Tayyab MA, Ashiq MN, Sohail M. Highly Sensitive and Selective Detection of Arsenic Using Electrogenerated Nanotextured Gold Assemblage. ACS OMEGA 2019; 4:13645-13657. [PMID: 31497682 PMCID: PMC6714603 DOI: 10.1021/acsomega.9b00807] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Accepted: 07/17/2019] [Indexed: 05/05/2023]
Abstract
Arsenic is considered as a toxic heavy metal which is highly detrimental to ecological systems, and long-term exposure to it is highly dangerous to life as it can cause serious health effects. Timely detection of traces of active arsenic (As3+) is very crucial, and the development of simple, cost-effective methods is imperative to address the presence of arsenic in water and food chain. Herein, we present an extensive study on chemical-free electrogenerated nanotextured gold assemblage for the detection of ultralow levels of As3+ in water up to 0.08 ppb concentration. The gold nanotextured electrode (Au/GNE) is developed on simple Au foil via electrochemical oxidation-reduction sweeps in a metal-ion-free electrolyte solution. The ultrafine nanoscale morphological attributes of Au/GNE substrate are studied by scanning electron microscopy. Square wave anodic stripping voltammetry (ASV) response for different concentrations of arsenites is determined and directly correlated with As3+ detection regarding the type of electrolyte solution, deposition potential, and deposition time. The average of three standard curves are linear from 0.1 ppb up to 9 ppb (n = 15) with a linear regression coefficient R 2 = 0.9932. Under optimized conditions, a superior sensitivity of 39.54 μA ppb-1 cm-2 is observed with a lower detection limit of 0.1 ppb (1.3 nM) (based on the visual analysis of calibration curve) and 0.08 ppb (1.06 nM) (based on the standard deviation of linear regression). Furthermore, the electrochemical Au/GNE is also applicable for arsenic detection in a complex system containing Cu2+, Ni2+, Fe2+, Pb2+, Hg2+, and other ions for the selective and sensitive analysis. Au/GNE substrate also possesses remarkable reproducibility and high stability for arsenic detection during repeated analysis and thus can be employed for prolonged applications and reiterating analyses. This electrochemically generated nanotextured electrode is also applicable for As3+ detection and analysis in a real water sample under optimized conditions. Therefore, fabrication conditions and analytical and electroanalytical performances justify that because of its low cost, easy preparation method and assembly, high reproducibility, and robustness, nanosensor Au/GNE can be scaled up for further applications.
Collapse
Affiliation(s)
- Noor-Ul-Ain Babar
- Department
of Chemistry, University of Engineering
and Technology (UET), G.T Road, Lahore 54890, Pakistan
| | - Khurram Saleem Joya
- Department
of Chemistry, University of Engineering
and Technology (UET), G.T Road, Lahore 54890, Pakistan
- E-mail:
| | - Muhammad Arsalan Tayyab
- Department
of Chemistry, University of Engineering
and Technology (UET), G.T Road, Lahore 54890, Pakistan
| | - Muhammad Naeem Ashiq
- Institute
of Chemical Sciences, Bahauddin Zakariya
University (BZU), Bosan Road, Multan 60000, Punjab, Pakistan
| | - Manzar Sohail
- Department
of Chemistry, School of Natural Sciences (SNS), National University of Science and Technology (NUST), H-12, Islamabad 46000, Pakistan
| |
Collapse
|
8
|
Lu S, Liu W, Wang Y, Zhang Y, Li P, Jiang D, Fang C, Li Y. An adsorbent based on humic acid and carboxymethyl cellulose for efficient dye removal from aqueous solution. Int J Biol Macromol 2019; 135:790-797. [PMID: 31103595 DOI: 10.1016/j.ijbiomac.2019.05.095] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 05/13/2019] [Accepted: 05/15/2019] [Indexed: 12/12/2022]
Abstract
Adsorbents from sustainable precursors are highly desirable for practical applications. In this study, carboxymethyl cellulose (CMC) and humic acid (HA) were adopted to fabricate a composite immobilized on precipitates of calcium hydroxide (PCH) and ferric hydroxide (PFH). The as-obtained adsorbent, denoted as HA-CMC/PMH (PCH and PFH were referred to as PMH), was analyzed by infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy and thermo gravimetric analysis. When applying for a typical organic pollutant of methylene blue (MB) removal from aqueous solution, a high adsorption capacity of 666.67 mg/g was achieved over HA-CMC/PMH. The adsorption mechanisms of MB involved ion exchanging and π-π interactions, this adsorption process mainly occurred on both anionic and aromatic groups. Adsorption behavior analysis indicated that Langmuir isotherm model and pseudo-second order kinetic model fitted experimental data well, suggesting a mono-layer adsorption of MB onto the adsorbent. Further thermodynamic analysis proved that the adsorption of MB onto HA-CMC/PMH was an exothermal spontaneous process. The developed adsorbent is also reusable with 79.93% of adsorption capacity remaining in the fifth recycle runs. Therefore, the adsorbent of HA-CMC/PMH is suggested to be a promising candidate for adsorption applications.
Collapse
Affiliation(s)
- Shan Lu
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Wenbin Liu
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Yabo Wang
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Yongkui Zhang
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Panyu Li
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Diyong Jiang
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Cuiting Fang
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Yonghong Li
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China.
| |
Collapse
|
9
|
Li SS, Zhou WY, Li YX, Jiang M, Guo Z, Liu JH, Huang XJ. Noble-Metal-Free Co0.6Fe2.4O4 Nanocubes Self-Assembly Monolayer for Highly Sensitive Electrochemical Detection of As(III) Based on Surface Defects. Anal Chem 2017; 90:1263-1272. [DOI: 10.1021/acs.analchem.7b04025] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Shan-Shan Li
- Key Laboratory
of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Wen-Yi Zhou
- Key Laboratory
of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Yi-Xiang Li
- Key Laboratory
of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Min Jiang
- Key Laboratory
of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Zheng Guo
- Key Laboratory
of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
| | - Jin-Huai Liu
- Key Laboratory
of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Xing-Jiu Huang
- Key Laboratory
of Environmental Optics and Technology, and Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, People’s Republic of China
| |
Collapse
|
10
|
Zhao G, Wang H, Liu G. Direct Quantification of Cd 2+ in the Presence of Cu 2+ by a Combination of Anodic Stripping Voltammetry Using a Bi-Film-Modified Glassy Carbon Electrode and an Artificial Neural Network. SENSORS 2017; 17:s17071558. [PMID: 28671628 PMCID: PMC5539607 DOI: 10.3390/s17071558] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 06/29/2017] [Accepted: 06/30/2017] [Indexed: 02/05/2023]
Abstract
Abstract: In this study, a novel method based on a Bi/glassy carbon electrode (Bi/GCE) for quantitatively and directly detecting Cd2+ in the presence of Cu2+ without further electrode modifications by combining square-wave anodic stripping voltammetry (SWASV) and a back-propagation artificial neural network (BP-ANN) has been proposed. The influence of the Cu2+ concentration on the stripping response to Cd2+ was studied. In addition, the effect of the ferrocyanide concentration on the SWASV detection of Cd2+ in the presence of Cu2+ was investigated. A BP-ANN with two inputs and one output was used to establish the nonlinear relationship between the concentration of Cd2+ and the stripping peak currents of Cu2+ and Cd2+. The factors affecting the SWASV detection of Cd2+ and the key parameters of the BP-ANN were optimized. Moreover, the direct calibration model (i.e., adding 0.1 mM ferrocyanide before detection), the BP-ANN model and other prediction models were compared to verify the prediction performance of these models in terms of their mean absolute errors (MAEs), root mean square errors (RMSEs) and correlation coefficients. The BP-ANN model exhibited higher prediction accuracy than the direct calibration model and the other prediction models. Finally, the proposed method was used to detect Cd2+ in soil samples with satisfactory results.
Collapse
Affiliation(s)
- Guo Zhao
- Key Lab of Modern Precision Agriculture System Integration Research, Ministry of Education of China, China Agricultural University, Beijing 100083, China.
- Key Lab of Agricultural Information Acquisition Technology, Ministry of Agricultural of China, China Agricultural University, Beijing 100083, China.
| | - Hui Wang
- Key Lab of Modern Precision Agriculture System Integration Research, Ministry of Education of China, China Agricultural University, Beijing 100083, China.
- Key Lab of Agricultural Information Acquisition Technology, Ministry of Agricultural of China, China Agricultural University, Beijing 100083, China.
| | - Gang Liu
- Key Lab of Modern Precision Agriculture System Integration Research, Ministry of Education of China, China Agricultural University, Beijing 100083, China.
- Key Lab of Agricultural Information Acquisition Technology, Ministry of Agricultural of China, China Agricultural University, Beijing 100083, China.
| |
Collapse
|
11
|
Yang M, Chen X, Jiang TJ, Guo Z, Liu JH, Huang XJ. Electrochemical Detection of Trace Arsenic(III) by Nanocomposite of Nanorod-Like α-MnO2 Decorated with ∼5 nm Au Nanoparticles: Considering the Change of Arsenic Speciation. Anal Chem 2016; 88:9720-9728. [DOI: 10.1021/acs.analchem.6b02629] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Meng Yang
- Institute
of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China
- Department
of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China
| | - Xing Chen
- Institute
of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China
| | - Tian-Jia Jiang
- Institute
of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China
- Department
of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China
| | - Zheng Guo
- Institute
of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China
| | - Jin-Huai Liu
- Institute
of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China
| | - Xing-Jiu Huang
- Institute
of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China
- Department
of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China
| |
Collapse
|
12
|
Han DD, Li SS, Guo Z, Chen X, Liu JH, Huang XJ. Shape dependent stripping behavior of Au nanoparticles toward arsenic detection: evidence of enhanced sensitivity on the Au (111) facet. RSC Adv 2016. [DOI: 10.1039/c5ra27778g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
This work reports a comparative study of gold cubes {100}, octahedra {111}, and rhombic dodecahedra {110} toward the detection of arsenic for the first time. Au octahedral nanoparticles were found to exhibit the highest sensitivity.
Collapse
Affiliation(s)
- Dong-Dong Han
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- PR China
- Nano-Materials and Environmental Detection Laboratory
| | - Shan-Shan Li
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- PR China
- Nano-Materials and Environmental Detection Laboratory
| | - Zheng Guo
- Nano-Materials and Environmental Detection Laboratory
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - Xing Chen
- Nano-Materials and Environmental Detection Laboratory
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - Jin-Huai Liu
- Nano-Materials and Environmental Detection Laboratory
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei 230031
- People's Republic of China
| | - Xing-Jiu Huang
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- PR China
- Nano-Materials and Environmental Detection Laboratory
| |
Collapse
|
13
|
Lima AEB, Luz GE, Batista NC, Longo E, Cavalcante LS, Santos RS. Determination of Ethambutol in Aqueous Medium Using an Inexpensive Gold Microelectrode Array as Amperometric Sensor. ELECTROANAL 2015. [DOI: 10.1002/elan.201500600] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
14
|
Determination of As(III) by anodic stripping voltammetry following double deposition and stripping steps at two gold working electrodes. Talanta 2015; 144:517-21. [DOI: 10.1016/j.talanta.2015.06.084] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 06/19/2015] [Accepted: 06/26/2015] [Indexed: 11/22/2022]
|
15
|
Wu S, Zhao Q, Zhou L, Zhang Z. Stripping Analysis of Trace Arsenic Based on the MnOx/AuNPs Composite Film Modified Electrode in Alkaline Media. ELECTROANAL 2014. [DOI: 10.1002/elan.201400219] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|