tailieunhanh - Bioremediation of soil containing dioxins by using bacteria in crude oil

The mixed bacteria collected from the water phase in crude oil deposit shows the decomposition of dioxin by adding the soil, mixing and settling. High concentration 50 ppm of dioxin in soil could decompose without nutritional salts at the rate of 60% after 6 weeks. | Tạp chí Khoa học công nghệ và Thực phẩm 16 (1) (2018) 3-10 BIOREMEDIATION OF SOIL CONTAINING DIOXINS BY USING BACTERIA IN CRUDE OIL Toyohisa Fujita1*, Gjergj Dodbiba1, Atsushi Shibayama2, Vo Dinh Long3 1 The University of Tokyo, Graduate School of Engineering, Japan Akita University, Graduate School of International Sciences, Japan 3 Industrial University of Ho Chi Minh City *Email: tfujita@ 2 Received: 3 August 2018; Accepted for publication: 5 September 2018 ABSTRACT The mixed bacteria collected from the water phase in crude oil deposit shows the decomposition of dioxin by adding the soil, mixing and settling. High concentration 50 ppm of dioxin in soil could decompose without nutritional salts at the rate of 60% after 6 weeks. Low concentration 10 ppm of dioxin in soil could decompose with nutritional salts at the rate of 80% after 6 weeks. If the dioxins still remain in the soil in Vietnam, there would be a possibility to decompose by using these bacteria inhabiting water separated from crude oil. Keywords: Bioremediation, soil, dioxin, decomposition, water phase in crude oil. 1. INTRODUCTION Dioxins are called persistent organic pollutants (POPs), meaning it takes a long time to break down once they are in the environment; and dioxins are highly toxic and can cause cancer, reproductive and developmental problems, damage to the immune system, and can interfere with hormones [1]. Nowadays, the dioxins present in the environment by incineration, combustion, industrial and reservoir sources [2]. However, the production of dioxins has been reduced by heating and rapid cooling for incinerations. On the other hand, during the Vietnam War from 1961 to 1971, the Agent Orange [3] was used as herbicide which contains 2,4-dicholorophenoxyacetic acid (2,4-D), 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) contaminated with 2,3,7,8-tetrachlorodibenzodioxine (TCDD) as shown in Figure 1. Figure 1. Chemical formula of herbicide used in Vietnam War [3] It

TỪ KHÓA LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.