Next Article in Journal
Cross-Border M&A and the Acquirers’ Innovation Performance: An Empirical Study in China
Next Article in Special Issue
Public Value of Marine Biodiesel Technology Development in South Korea
Previous Article in Journal
Experimental Performance Analysis of Flat Plate Solar Collectors Using Different Nanofluids
Open AccessArticle

Valorization of Biomass Hydrolysis Waste: Activated Carbon from Humins as Exceptional Sorbent for Wastewater Treatment

1
Guangdong Provincial Key Laboratory of Distributed Energy Systems, Dongguan University of Technology, Dongguan 511700, China
2
Hawaii Natural Energy Institute, University of Hawaii, Honolulu, HI 96822, USA
*
Author to whom correspondence should be addressed.
Sustainability 2018, 10(6), 1795; https://doi.org/10.3390/su10061795
Received: 6 May 2018 / Revised: 25 May 2018 / Accepted: 27 May 2018 / Published: 30 May 2018
(This article belongs to the Special Issue Biofuels–Bioenergy Waste to Value Added Feedstock)
Humins, waste from biomass hydrolysis, are the main factor limiting the utilization efficiency of biomass carbon. In the present study, waste humins were employed for activated carbon production though KOH activation in a temperature range of 500–900 °C. The structure and properties of the activated carbons were studied, and a honeycomb-like macropore structure was observed. High activation temperature was demonstrated to be capable of promoting the formation of activated carbon with high surface area, high pore volume and high adsorption capacity. The activated carbon obtained by carbonization at 800 °C (KOH800) was selected as sorbent to adsorb methylene blue (MB) and phenol in aqueous solution, and the adsorption process can be explained by pseudo-second-order kinetic model. The adsorption behavior complies with Langmuir isotherm model and exhibits superior adsorption capacity of 1195 and 218 mg/g for MB and phenol, respectively. The impacts of surface area, acidic active sites and pore structures were also investigated, and it was found that the adsorption of approximately 44.0% MB and 39.7% phenol were contributed by the pores with apertures from 1.7 nm to 300 nm. View Full-Text
Keywords: humins; biomass hydrolysis; activated carbon; phenol; methylene blue humins; biomass hydrolysis; activated carbon; phenol; methylene blue
Show Figures

Graphical abstract

MDPI and ACS Style

Kang, S.; Fu, J.; Deng, Z.; Jiang, S.; Zhong, G.; Xu, Y.; Guo, J.; Zhou, J. Valorization of Biomass Hydrolysis Waste: Activated Carbon from Humins as Exceptional Sorbent for Wastewater Treatment. Sustainability 2018, 10, 1795.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop