Surfactant-nutrient mix-enhanced bioremediation of soil/aquifers
DOI:
https://doi.org/10.15626/Eco-Tech.2005.001Abstract
Our research involves the development of economically feasible surfactant/surfactant-nutrient
mix (SSNM) - enhanced bioremediation methodology for sustainable, in situ bioremediation
of fuel-contaminated aquifers via in vitro column-based optimization of an effective SSNM
and the study of its effect on the solubilization/mobilization and biodegradation of NAPL
(fuel) in in vitro site/aquifer-simulated bioremediation, The essence of our findings:
kerosene's maximum enhanced mobilization - f= 3,6, compared with that of deionized water,
was achieved with an SSNM having the composition of linear alkylbenzene sulfonate: cocoamphodiacetate: surfactant-nutrient X = 0, I 5: 0, I 5: 0,05 g/L, respectively; 60-64% of the
initial amount of kerosene in the "packed" saturated soil matrix, has been eluted from it
during -30 days, compared with -87% of toluene during the same time period and 68% of
kerosene biodegradation in "vessel" settings, in 21 days, In conclusion: The indigenous
microorganisms present in the vaduse zones of fuel-contaminated sandy soil aquifers are
capable of removing up to ~81 % of the initially contained kerosene in ~42 days, Optimized
SSNMs enhance both, mobilization of the balky NAPLs and the desorbtion/solubilization/
dispersion of the entrapped NAPL which, in tum, facilitate their enhanced biodegradation,
Metrics
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