TAILIEUCHUNG - Summary of dissertation Environmental engineering: Concentrative assessment of organic chlorine pesticides in water, sediments, aquatic organisms at the Saigon – Dong Nai River estuary and testing the toxicity of DDTs on embryos and larvae of Pacific oysters, Fish Medaka

The objective of the dissertation is to determine the residue of pesticides OCPs in water, sediments, aquatic organisms at the estuary of the Saigon – Dong Nai and to evaluate the toxicity of the pesticides DDTs on the embryos and larvae of the Pacific oysters (Crassostrea Gigas), Fish Medaka (Oryzias latipes). | MINISTRY OF EDUCATION AND TRAINING VIETNAM ACADEMY OF SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY OF SCIENCE AND TECHNOLOGY ----------------------------- Nguyen Xuan Tong ASSESSMENT OF ORGANIC CHLORINE PESTICIDES IN WATER SEDIMENTS AQUATIC ORGANISMS AT SAI GON-DONG NAI RIVER ESTUARY AND TESTING THE TOXICITY OF DDTs ON EMBRYOS AND LARVAE OF PACIFIC OYSTERS FISH MEDAKA Major Environmental Engineering Code 9 52 03 20 SUMMARY OF DISSERTATION Hanoi 2021 The dissertation was implemented at Graduate University of Science and Technology - Vietnam Academy of Science and Technology. The first supervisor Dr. Mai Huong The second supervisor Assoc. Prof. Dr. Duong Thi Thuy Reviewer 1 Reviewer 2 Reviewer 3 . The thesis will be defended at the Academy-level . Thesis Evaluation Council Graduate University of Science and Technology - Vietnam Academy of Science and Technology . Stored by - Library of Vietnam Academy of Science and Technology - National Library of Vietnam 1 INTRODUCTION 1. The necessary of the dissertation Organic component pesticides OCPs have been widely used around the world over the past centuries to control pests fungi and various insects to increase productivity protect public health and prevent mosquitoes that cause malaria. However OCPs were banned or restricted from use globally several decades ago due to their toxicity to living organisms. Recently rapidly growing industrial zones and urban areas can be potential sources of OCPs. The illegal uses of OCPs upstream have also caused the rise of OCPs concentrations in surface water and sediment in downstream areas of the Saigon Dong Nai River. Thus studies on OCPs in surface water sediment and estuarine species are really important. Therefore the current thesis Concentrative assessment of organic chlorine pesticides in water sediments aquatic organisms at the Saigon Dong Nai River estuary and testing the toxicity of DDTs on embryos and larvae of Pacific oysters Fish Medaka was conducted from 2017 to 2018. .

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