Application of Cupron Spectrophotometry Determining Copper in Electroplating(I)(to be continued)——Determination of Copper in Electroplating Waste Water
Cupron spectrophotometry determining copper with EDTA-Cit-NH4OH mixed solution to screen interference ions and directly determining copper in aqueous solution was introduced.This method can be used in electroplating analysis in following aspects: analysis of copper in electroplating waste water,analysis of copper impurity in various electroplating bath,analysis of copper in alloy coatings and alloy plating baths etc.Principle,analytical operation and calculation of this method were also introduced in detail.
The aim of this study was to evaluate environmental benefits resulting from the construction of a Sewage Treatment Plant (STP) in Mitilini, Greece. The main benefits identified were the improvement of the coastal water quality and subsequent impacts on citizens’ activities. The valuation was conducted using the Contingent Valuation Method (CVM) through the elicitation of individuals’ willingness to pay (WTP). Due to the significant amount of zero and protest responses, different measurements of mean WTP were calculated and the need for further research on social factors which influence individuals’ valuation is emphasized.