Abstract
The electrochemical reduction of Trichloroacetic acid (TCA) on a platinum electrode by cyclic and linear sweep voltammetry was described. The measurements were investigated under optimized conditions. The supporting electrolyte was 0.01 M sodiumnitrate solution (pH 6.0), scan rate 50mV\s and the reached detection and quantification limits was 4x10-6 mol l-1. The obtained result indicated linear increasing of the current with concentration of TCAA between lower and upper detection limits and excellent sensitivity towards TCAA reduction, which demonstrates the analytical utility of platinum electrode. Meanwhile, interference from other ions and substances were examined. The experimental results indicate that the method for the determination of TCAA samples is successful comparing with other methods or techniques.
Highlights
Trichloroacetic acid (TCAA), as an organohalide pollutant, is found in industrial wastes and as byproducts of water chlorination [1,2,3,4]
The process used for disinfecting drinking water to control infectious microbial contaminants[5,6,7,8] .It can introduced through pesticide degradation, atmospheric degradation of refrigerant compounds [9] .(TCAA) is highly soluble in water and toxic to humans, animals, plants and algae, Morever trichloroacetic acid has been used as a herbicide[5]
It may affect kidney, and the US Environmental Protection Agency (EPA) has classified them as probable human carcinogens [5,6,7]. (TCAA) is regularly found in drinking water from drinking water treatment plants in the mg/l range, and in environmental waters such as surface water, rainwater precipitation, seawater and wastewaters. They have been recently detected in swimming pools and tap water[1,5,6,7,8].So a large number of techniques have been suggested for the treatment of drinking water containing TCAA among which are gas chromatography (GC) with an electron capture detector (ECD), GC with ECD and mass spectrometric (MS), and HPLC technique[5]
Summary
Trichloroacetic acid (TCAA), as an organohalide pollutant, is found in industrial wastes and as byproducts of water chlorination [1,2,3,4]. It is of great concern to public health because of their suspected carcinogenicity which exhibit a potential risk of cancer after a lifetime exposure in drinking water at low concentrations [8], mutagenicity as well as developmental, reproductive, hepatic toxicity and it can cause Irritation of the skin and eyes, risk of breath defects, irritate nose and lung causing coughing or shortness of breath It may affect kidney, and the US Environmental Protection Agency (EPA) has classified them as probable human carcinogens [5,6,7]. The electrocatalytic reduction of TCA at platinum electrode using cyclic and linear sweep voltammetric technique under the optimum conditions sush as supporting electrolyte, concentration of supporting electrolyte, scan rate, accumulation potential, and deposition time to determine TCAA with high selectivity and Sensitive method in presence of interferences with lower detection limit than other methods with the same and different techniques
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