The First Utilization of Graphene Nano-Sheets and Synthesized Fe3O4 Nanoparticles as a Synergistic Electrodeposition Platform for Simultaneous Voltammetric Determination of Some Toxic Heavy Metal Ions in Various Real Environmental Water Samples

2021 ◽  
pp. 106966
Author(s):  
Hanaa S. El-Desoky ◽  
Amr M. Beltagi ◽  
Mohamed M. Ghoneim ◽  
Ahmed I. El-Hadad
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Fe3o4 Nanoparticles ◽  
Water Samples ◽  
Heavy Metal Ions ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Toxic Heavy Metal ◽  
Simultaneous Voltammetric Determination

Study on Separation/Enrichment of Copper (II) Using Microcrystalline Phenolphthalein Loaded with Cupferron

2013 ◽  
Vol 807-809 ◽  
pp. 456-460
Author(s):  
Xin Rong Wen ◽  
Chang Qing Tu
Keyword(s):  
Metal Ions ◽  
Water Samples ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Optimum Conditions ◽  
Experimental Conditions ◽  
Quantitative Separation ◽  
Novel Method

The paper presents a novel method for the separation/enrichment of trace Cu2+ using microcrystalline phenolphthalein loaded with cupferron (Cup) prior to the determination by spectrophoto- metry. The effects of different parameters,such as the dosages of phenolphthalein and Cup and acidity on the enrichment yield of Cu2+ have been investigated to select the experimental conditions. The possible enrichment mechanism of Cu2+ was discussed.The results showed that under the optimum conditions, Cu2+ could be quantificationally adsorbed on the surface of microcrystalline phenolphthalein in the form of the chelate precipitate of Cu (Cup)2 ,while Ni2+,Zn2+,Mn2+,Fe2+ and Al3+ could not be adsorbed at all.Therefore,Cu2+ was completely separated from the above metal ions in the solution. The quantitative separation/enrichment and determination of Cu2+ in various environmental water samples was performed, and the results agreed well with those obtained by FAAS method.

scholarly journals Determination of Heavy Metal Ions and Organic Pollutants in Water Samples Using Ionic Liquids and Ionic Liquid-Modified Sorbents

2019 ◽  
Vol 2019 ◽  
pp. 1-19 ◽  
Author(s):  
Minglei Tian ◽  
Luwei Fang ◽  
Xuemin Yan ◽  
Wei Xiao ◽  
Kyung Ho Row
Keyword(s):  
Heavy Metal ◽  
Ionic Liquids ◽  
Metal Ions ◽  
Organic Pollutants ◽  
Water Samples ◽  
Heavy Metal Ions ◽  
Environment Friendly ◽  
Governmental Agencies ◽  
Modified Sorbents

Water pollution, especially by inorganic and organic substances, is considered as a critical problem worldwide. Several governmental agencies are listing an increasing number of compounds as serious problems in water because of their toxicity, bioaccumulation, and persistence. In recent decades, there has been considerable research on developing analytical methods of heavy metal ions and organic pollutants from water. Ionic liquids, as the environment-friendly solvents, have been applied in the analytical process owing to their unique physicochemical properties. This review summarizes the applications of ionic liquids in the determination of heavy metal ions and organic pollutants in water samples. In addition, some sorbents that were modified physically or chemically by ionic liquids were applied in the adsorption of pollutants. According to the results in all references, the application of new designed ionic liquids and related sorbents is expected to increase in the future

Determination of Trace Heavy Metal Ions in Water by FAAS after Preconcentration with ASTO

2013 ◽  
Vol 826 ◽  
pp. 267-270
Author(s):  
En Jun Song
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Absorption Spectrometry ◽  
Environmental Water ◽  
Flame Atomic Absorption ◽  
Experimental Parameters ◽  
Ph Range ◽  
Coexisting Ions

A new method of preconcentration with nanometer-strontium titanate immobilized on aluminum oxide (ASTO) combined with flame atomic absorption spectrometry (FAAS) was proposed for the determination of trace heavy metal ions, included Cu2+, Ni2+ and Ag+, in environmental water. The optimum experimental parameters for preconcentration of the heavy metals studied, such as pH, shaking time, eluent and coexisting ions, have been investigated. The results showed that Cu2+, Ni2+ and Ag+, could be quantitatively retained by the ASTO in the pH range of 5-8, and then eluted completely with 2 mol·L-1 HNO3. The detection limits of this method for Cu2+, Ni2+ and Ag+ were 0.031μg·L-1, 0.15μg·L-1and0.041μg·L-1 with an enrichment factor of 50, respectively. The method has been applied to the simultaneous determination of trace amounts of Cu2+, Ni2+ and Ag+ in environmental water, the recoveries were all in 95%-105%.

Study on Determination of Trace Cobalt in Environmental Water Samples after Separation/Enrichment Using Microcrystalline Phenolphthalein Modified with 8-Hydroxyquinoline

2013 ◽  
Vol 316-317 ◽  
pp. 279-285
Author(s):  
Xin Rong Wen ◽  
Chang Qing Tu
Keyword(s):  
Metal Ions ◽  
Spectrophotometric Determination ◽  
Water Samples ◽  
Environmental Water ◽  
New Method ◽  
Environmental Water Samples ◽  
Optimum Conditions ◽  
Experimental Conditions ◽  
Novel Method

The paper presents a novel method for the separation/enrichment of trace Co2+ using microcrystalline phenolphthalein modified with 8-hydroxyquinoline (HQ) prior to the determination by spectrophotometry. The effects of different parameters,such as the dosages of phenolphthalein and HQ,various salts and acidity on the enrichment yield of Co2+ have been investigated to select the experimental conditions. The possible enrichment mechanism of Co2+ was discussed.The results showed that under the optimum conditions, Co2+ could be quantificationally adsorbed on the surface of microcrystalline phenolphthalein in the form of the chelate precipitate of Co(HQ)2 ,while K+,Na+,Ca2+,Mg2+,Cd2+,Zn2+,Mn2+,Fe2+ and Al3+ could not be adsorbed at all.Therefore,Co2+ was completely separated from the above metal ions in the solution. A new method for the spectrophotometric determination of trace cobalt after separation/enrichment using microcrystalline phenolphthalein modified with 8-hydroxyquinoline was established.The proposed method has been successfully applied to the determination of Co2+ in various environmental water samples, and the results agreed well with those obtained by FAAS method.

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