Environmental Sustainability of Phytoremediation in Contaminated Soil with Heavy Metal and Microbial Investigation

• Main Authors: Pin-ju Huang, 黃品儒
• Other Authors: Tzung-yuh Yeh
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/44435532286777821875

碩士 === 國立高雄大學 === 土木與環境工程學系碩士班 === 104 === The advancement of heavy industry, commerce, technology industry and other related industries in Taiwan over the years has caused the problem of wastewater leading to varied degrees of heavy metal pollution contaminating the soil. According to the Soil and Groundwater Pollution Remediation Fund Management Board’s investigation and statistics in 2015, a total of 4,138 lots of farmland, 140 factories, 22 illegal dumping sites, and 8 other sites were announced as pollution control sites exceeding the heavy metal pollution control standards. In domestic heavy metal pollution distribution status, farmland takes up the largest proportion, with heavy metal as the main pollutant.In consideration of the fact that most polluted sites are farmland, this study adopts phytoremediation, a green remediation technology, for the sake of restoring soil fertility and ensuring environmental sustainability, and adds Ethylenediaminedisuccinic acid (EDDS) and the plant growth regulator (GA3) to examine the overall efficiency of phytoremediation. The pot experiment of this study finds that environmentally sustainable phytoremediation achieves the greatest efficacy regarding the remediation of soil polluted by copper, zinc and nickel. The best combination of operational factors is the addition of the EDDS and GA3. The environment where the Ethylenediaminedisuccinic acid (EDDS) is added shows a poorer performance in the remediation of the heavy metal lead. In addition, the PCR-DGGE analysis results of bacterial flora change show that the combination “heavy metal+EDDS+GA3” brings about the richest bacterial flora, indicating that the addition of EDDS and GA3 can stimulate microbial growth, thereby achieving richer bacterial flora.