Abstract
The copper content in natural waters usually range from 0.2 to 30 μg/L. The higher concentrations are habitually found in industrial effluents and other contaminated waters. This work develops the spectrophotometric method of determination of copper (II) microgram amounts with a new reagent - sodium salt of 4- phenylsemicarbazone 1,2-naphthoquinone-4-sulfonic acid (L), used as a ligand for a new coordination compound of copper (II). The complex formation is accompanied by color change, allowing use of this property for quantitative determination of copper (II) ions in various objects such as: alloys, superconducting ceramics and tap water. The determination of copper (II) ions has been carried out by voltammetric and spectrophotometric methods. The complex of composition CuL is stable within the pH range from 5.74 to 6.51. Its stability constant is logβ = 4.53. The molar absorption coefficient of the complex has been found. Both methods give the same concentration of about 0.0400 mg/L of copper (II) in tap water, ceramics, and alloys. The detection limit of the spectrophotometric determination of copper (II) ions in the presence of the main metal ions in tap water is 0.012 mg/mL. The advantages of this method are the simplicity of the synthesis of reagent, its ease of recrystallization from water-ethanol solution, and stability in the crystalline state.
Highlights
IntroductionThe higher concentrations are habitually found in industrial effluents and other contaminated waters
The copper content in natural waters usually range from 0.2 to 30 μg/L
The aim of this work is the use of a new reagent for quantitative determination of copper (II) ions in water and industrial objects, establishing optimum conditions for complex formation of copper (II) ion with a synthesized ligand, as well as the elucidation of the detection limit of copper (II) ions in tap water, and superconducting ceramics
Summary
The higher concentrations are habitually found in industrial effluents and other contaminated waters. The diversity of chemical industries, a large number of chemical products (initial, intermediate, and final) used and produced in manufacturing processes, cause the formation of wastewater contaminated with organic and inorganic substances of very different composition and volume (Qadir et al 2015). Despite its less-significant toxicity, copper has become a widely distributed pollutant in natural water as a result of the dumping of electronic trash and mining residues (Zhang et al 2014). The average copper concentration in groundwater (5 ppb) is similar to that in lakes and rivers; monitoring data indicate that some groundwater contains levels of copper (up to 2.783 ppb) that are well above the standard of 1.300 ppb for drinking water (ATSDR 2004). Complex formation is accompanied by a color change, allowing the use of this property for analytical purposes for quantitative determination of copper (II) ions in various objects such as: alloys, superconducting ceramics as well as tap water
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
