A Study on Removing Arsenic Contamination in Soil by Phytoremediation

• Main Author: Huynh, The An
• Other Authors: Chen, Yi-Ching
• Format: Others
• Language: en_US
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/w9sfxa

碩士 === 大葉大學 === 環境工程學系研究所 === 107 === Phytoremediation specifically presents here for the results of a study on the removal of arsenic contamination in soil is using Steudneri (Dracaena Fragrans) in Tan Thong Hoi Commune, Cu Chi District, Ho Chi Minh City, Vietnam. This is a large biomass species that grows very well in nature and can survive in both soil and water environments. It is also a lucky symbol of the Vietnam people, used by many Asia people as a bonsai. In this research, Steudneri (Dracaena Fragrans) was planted on Arsenic – contaminated soil at five levels of concentration of 0 mg/kg, 100 mg/kg, 200 mg/kg, 300 mg/kg and 500 mg/kg with three replications each. The research results show that after 90 days experimental in the five concentrations the survival rate was 100%. However, Arsenic concentrations have a significant effect on growth parameters, especially in sample experiment 5 (500 mg/kg) the growth of the plant showed marked signs of slow growth, the leaves were retracted. Analyzed results on Arsenic content in roots, stems, and leaves of plants at all experimental after 90 days show that there was a linear relationship between Arsenic content in different parts of the plants (roots, stems and leaves) and in soil samples. At the highest experiment concentration (500 mg/kg), the concentration of arsenic in roots was 15.7 ± 1.5 mg / kg, that in stems was 4.4 ± 0.7 mg / kg and that in leaves was 3.2 ± 0.3 mg / kg. The amount of arsenic accumulated in the roots (as compared to the stems, leaves) also had the highest percentage. It was assumed in this study that 209.1 g of biomass of plants Steudneri (Dracaena Fragrans) can remove arsenic 1.14 mg after 90 days.