Development of a slow polycolloid-releasing substrate (SPRS) biobarrier to remediate TCE-contaminated aquifers

S.H.Liang; Y.C. Kuo; S.H.ChenC.Y.ChenC.M. Kao

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Development of a slow polycolloid-releasing substrate (SPRS) biobarrier to remediate TCE-contaminated aquifers

机译：Development of a slow polycolloid-releasing substrate (SPRS) biobarrier to remediate TCE-contaminated aquifers

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In this study, an in situ slow polycolloid-releasing substrate (SPRS) biobarrier system was developed to continuously provide biodegradable substrates for the enhancement of trichloroethylene (TCE) reductive dechlorination. The produced SPRS contained vegetable oil (used as a slow-released substrate), cane molasses used as an early-stage (fast-degradable) substrate, and surfactants Simple Green? (SG) and soya lecithin (SL). An emulsification study was performed to evaluate the globule droplet size and stability of SPRS. The distribution and migration of the SPRS were evaluated in a column experiment, and an anaerobic microcosm study was performed to assess the capability of SPRS to serve as a slow and long-term carbon-releasing substrate for TCE dechlorination. The results show that a stable oil-in-water (W/O,50/50) emulsion (SPRS) with uniformly small droplets (D_(10), 0.93 μm) has been produced, continuously supplying primary substrates. The emulsion containing the surfactant mixture (with 72 mg/L SL and 71 mg/L SG) had a small absolute value of the zeta potential, which reduced the inter-particle repulsion, leading the emulsion droplets to adhere to one another after collision. The addition of SPRS creates anaerobic conditions and leads to a more complete and thorough removal of TCE through biodegradation and sorption mechanisms.

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来源
《Journal of hazardous materials》 |2013年第15期|107-115|共9页
作者
S.H.Liang; Y.C. Kuo; S.H.ChenC.Y.ChenC.M. Kao;
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作者单位

Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan;

Institute of Urban Environment, Chinese Academy of Science, Xiamen, China;

Formosa Mastics Corp., Taiwan, Kaohsiung, Taiwan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类 712;
关键词
Biobarrier; Reductive dechlorination; Slow polycolloid-releasing substrate (SPRS); Trichloroethylene (TCE);

Development of a slow polycolloid-releasing substrate (SPRS) biobarrier to remediate TCE-contaminated aquifers

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