@masterthesis{Li, type = {Bachelor Thesis}, author = {Li, Yeyang}, title = {Investigation of Acute Toxicity of Urban Surface Water Combined with Luminescent Bacteria Test, TOC and AAS}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:1383-opus4-8118}, school = {Hochschule Rhein-Waal}, pages = {70}, abstract = {With the acceleration of urbanization, the quality of urban water quality is a serious issue. In this study, three main analytical techniques were used to comprehensively analyse the urban surface water quality. Luminescent bacteria test is a rapid and sensitive bioassay for acute toxicity determination in water. Through the inhibition rate of bacteria, the toxicity of water quality is reflected in a short-term. In this study, Vibrio fischeri bioassay was used to determine the toxicity in urban surface water. However, when the luminescence results of samples have only a slight difference, AAS and TOC can be used as sensitive chemical analytical techniques. atomic absorption spectroscopy (AAS) can analyse the heavy metal concentration and total organic carbon (TOC) can determine the organic contamination in water. AAS and TOC can quantitatively and qualitatively analyse chemical parameters. In the study, although each technique has a certain limitation, the combination of these three experiments can be detailed explain the cause of toxicity of urban surface water. Therefore, the advantage of these three methods which are fast, highly sensitive, and easy to operate, makes the analysis of water quality more efficiently. In this study, the water samples were analysed after filtration. In case the toxicity being related to substances sorbed to the suspended matter has a significant effect on water quality, it is necessary to conduct unfiltered experiments in future research.}, language = {en} }