Rice husk hydrochars from metal chloride-assisted hydrothermal carbonization as biosorbents of organics from aqueous solution
Open Access
- 9 October 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in Bioresources and Bioprocessing
- Vol. 8 (1), 1-15
- https://doi.org/10.1186/s40643-021-00451-w
Abstract
Hydrochar a carbon-rich material resulting from hydrothermal carbonization of biomass, has received substantial attention because of its potential application in various areas such as carbon sequestration, bioenergy production and environmental amelioration. A series of hydrochars were prepared by metal chloride-assisted hydrothermal carbonization of rice husk and characterized by elemental analysis, zeta potential, X-ray diffraction, Brunauer–Emmett–Teller measurements, Fourier transform infrared spectroscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy and scanning electron microscopy. The results reveal that the prepared hydrochars have carbon contents ranging from 45.01 to 58.71%, BET specific areas between 13.23 and 45.97 m2/g, and rich O-containing functional groups on the surfaces. The metal chlorides added in the feedwater could improve the degree of carbonization and show significant effects on the physical, chemical and adsorption properties of the hydrochars. The adsorption of the selected organics on the hydrochars is a spontaneous and physisorption-dominated process. The hydrochars possess larger adsorption capacities for 2-naphthol than for berberine hydrochloride and Congo red, and the modeling maximum adsorption capacities of 2-naphthol are in the range of 170.1–2680 mg/g. The adsorption equilibrium could be accomplished in 10, 40 and 30 min for 2-naphthol, berberine hydrochloride and Congo red, respectively. These results suggest metal chloride-assisted hydrothermal carbonization a promising method for converting biomass waste into effective adsorbents for wastewater treatment.Funding Information
- Science Foundation Project of Zhejiang University of Science and Technology (2021QN038)
- Zhejiang Provincial Association of Science and Technology (SKX201901)
- Zhejiang Provincial Key Research and Development Plan of China (2020C01017)
This publication has 46 references indexed in Scilit:
- Preparation of sewage sludge based activated carbon by using Fenton’s reagent and their use in 2-Naphthol adsorptionBioresource Technology, 2013
- Development of a heterogeneous catalyst for lignocellulosic biomass conversion: Glucose dehydration by metal chlorides in a silica-supported ionic liquid layerEnvironmental Progress & Sustainable Energy, 2013
- Pretreatment of olive tree biomass with FeCl3 prior enzymatic hydrolysisBioresource Technology, 2013
- Effect of salt addition on hydrothermal carbonization of lignocellulosic biomassFuel, 2012
- Acetic acid and lithium chloride effects on hydrothermal carbonization of lignocellulosic biomassBioresource Technology, 2011
- A new route for preparation of hydrochars from rice huskBioresource Technology, 2010
- Adsorption behaviors of a novel carbonyl and hydroxyl groups modified hyper-cross-linked poly(styrene-co-divinylbenzene) resin for β-naphthol from aqueous solutionJournal of Hazardous Materials, 2010
- Removal of Zn (II) from aqueous solution by using hybrid precursor of silicon and carbonBioresource Technology, 2010
- Corn stover pretreatment by inorganic salts and its effects on hemicellulose and cellulose degradationBioresource Technology, 2009
- CONTROLLING HOPF BIFURCATION IN FLUID FLOW MODEL OF INTERNET CONGESTION CONTROL SYSTEMInternational Journal of Bifurcation and Chaos, 2009