Lab Study on In-situ Sediment Aeration for Sulfide Odor Control of Tidal River
For the research on odor control technology of contaminated sediment, a 20 m channel with river sediments and water was built to simulate irregular semidiurnal tidal river in the Pearl River Delta area. The sediment contaminants contain sulfides, nutrients, heavy metals and organic matters. In this work, Firstly, sediment aerating was used to suspend the sediments into overlying water, in which the sulfide was oxidized. Then chemicals were added to stabilize heavy metals and to precipitate the suspended sediments. The results showed that, with use of sediment aerating, over 99% of sulfide in sediments was oxidized, the odors disappeared. However, after sediment aeration, the extraction concentrations of Cu, Zn and Pb from sediments increased to 54.23, 57.15 and 5.37 mg/L from 13.04, 29.54 and 3.63 mg/L, which all exceed the national standard values given in the Identification Standard for Hazardous Waste (GB 5085.3-1996). Yet, using in-situ stabilization, the extraction concentrations of the three metals were reduced by 62.8%, 75.6% and 90.9%, respectively, which are much lower than the standard.
Tidal River odors control sediment remediation in-situ aeration in-situ stabilization
YU Guangwei LEI Hengyi YU Qiang BAI TAO LI Zhong
Department of Environmental Science and Engineering,South China Agriculture University,Guangzhou 510 School of Environmental Science and Engineering,Sun Yat-sen University,Guangzhou 510275,Guangdong,Ch
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
1547-1550
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）