Abstract
Urine, which is composed of water, urea and mineral substance, has been treated as a kind of wastewater for a long time. In this work, urine was used as a novel activator for sludge activation and porous carbon preparation. The pyrolysis was implemented for urine transformation and sludge carbonization. It was found that urine was firstly converted to pore template g-C3N4 at 550℃ and g-C3N4 was in situ decomposed to form pores at 650℃ in the 2nd stage. The influence of pyrolysis temperature in each stage and urine to sludge ratio on properties of carbon was systematically investigated by using thermogravimetric analysis, N2 adsorption-desorption technique and transmission electron microscope. The maximum specific surface area of the produced carbon was 253 m2 g−1, which was equivalent to the carbon prepared by traditional H3PO4 activation. The carbon also had higher adsorption capacity (19.1 mg g−1) to a typical dye Eriochrome Black T (EBT) and meanwhile showed strong stability and reusability in the repeated adsorption cycles. The implementation of using urine as bio-waste activator for porous carbon preparation would have important implications for waste recycle and reutilization.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
