Oil sludge from an oil storage tank was treated using
a combined
ultrasound and thermochemical cleaning method. The effects of cleaning
temperature, cleaning time, ultrasound frequency, ultrasound power,
and other factors on the oil recovery were investigated. Experiments
on the screening and remixing of reagents were conducted and indicated
that the best constituents of detergent solution were sodium silicate,
sodium dodecyl benzene sulfonate, and fatty alcohol ethoxylates in
a ratio of 1:1:1. The optimum conditions of the combined treatment
system were also determined. The results showed that, under the optimum
conditions, the oil content of oil sludge dropped from 43.13% to 1.01%,
0.53% of solids remained in the separated oil layer, and 99.32% oil
recovery could be achieved when the concentration of detergent solution
was to 2 g/L. Compared with traditional thermochemical cleaning, the
oil recovery was 17.65% higher for the combined treatment system.
Implantable glucose biosensor based on poly (3,4-ethylenedioxythiophene) (PEDOT) modified carbon fiber (CF) microelectrode was fabricated for the first time. Main appeal of this work was the immobilization of glucose oxidase (GOx) on PEDOT film by electrostatic interaction, which resulted in the direct electron transfer (DET) between the active sites of enzyme and electrode in the help of PEDOT. The sensor exhibited selective response to glucose in the presence of some common interference. The biosensor operates at a low potential of −0.65 V vs Ag/AgCl, and the amperometric response was linear over range from 0.5 mM to 15 mM for glucose with a sensitivity of 8.5 μA·cm−2·mM−1. The Michaelis-Menten constant was calculated as 6.5 mM, and the sensor retain 81.3% sensitivity after 60 d storage. Moreover, the extremely simple process of DET construction could be potentially extended for the mass production.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.