Metal Removal from Contaminated Soil and Sediments by the Biosurfactant Surfactin

Autor:	Susan James, Catherine N. Mulligan, Raymond N. Yong, Hugh P.J. Bennett, Bernard F. Gibbs
Rok vydání:	1999
Předmět:	Cadmium Ultrafiltration Environmental engineering chemistry.chemical_element General Chemistry Zinc Biodegradation Copper Soil contamination chemistry.chemical_compound chemistry Environmental chemistry Soil water Environmental Chemistry Surfactin
Zdroj:	Environmental Science & Technology. 33:3812-3820
ISSN:	1520-5851 0013-936X
DOI:	10.1021/es9813055
Popis:	Batch soil washing experiments were performed to evaluate the feasibility of using surfactin from Bacillus subtilis, a lipopeptide biosurfactant, for the removal of heavy metals from a contaminated soil and sediments. The soil contained high levels of metals and hydrocarbons (890 mg/kg of zinc, 420 mg/kg of copper, and 12.6% oil and grease), and the sediments contained 110 mg/kg of copper and 3300 mg/kg of zinc. The contaminated soil was spiked to increase the levels of copper, zinc, and cadmium to 550, 1200, and 2000 mg/kg, respectively. Water alone removed minimal amounts of copper and zinc (less than 1%). Results showed that 0.25% surfactin/1% NaOH could remove 25% of the copper and 6% of the zinc from the soil and 15% of the copper and 6% of the zinc from the sediments. A series of five washings of the soil with 0.25% surfactin (1% NaOH) was able to remove 70% of the copper and 22% of the zinc. The technique of ultrafiltration and the measurement of octanol−water partitioning and ζ-potential were used...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5d82e2bcc2059f5431960d2feefff3fd https://doi.org/10.1021/es9813055 Zobrazit plný text záznamu