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Use of sewage sludge biochar as a catalyst in production of biodiesel through thermally induced transesterification

Biochar 2022年第1期4卷 74-88页

作者： Sungyup Jung Minyoung Kim Yong-Hyun Kim Kun-Yi Andrew Lin Wei-Hsin Chen Yiu Fai Tsang eilhann e.kwon Department of environmental engineering Kyungpook National UniversityDaegu 41566Republic of Korea. Department of earth Resources and environmental engineering Hanyang UniversitySeoul 04763Republic of Korea Department of Civil EnvironmentalResources and Energy EngineeringJeonbuk National UniversityJeollabukdoJeonju 54896Republic of Korea Department of environmental engineering and Innovation and Development Center of Sustainable Agriculture National Chung Hsing University250 Kuo-Kuang RoadTaichungTaiwanChina Department of Aeronautics and Astronautics National Cheng Kung UniversityTainan 701TaiwanChina Research Center for Smart Sustainable Circular economy Tunghai UniversityTaichung 407TaiwanChina Department of Mechanical engineering National Chin-Yi University of TechnologyTaichung 411TaiwanChina Department of Scienceand environmental Studies The Education University of Hong KongTai PoNew Territories999077 Hong KongHong Kong

Sewage sludge(SS)is a residual/semi-solid material produced from industrial and municipal wastewater treatment *** contains a high content of lipids and earth alkaline metals that can be used as catalysts for various chemical applications;however,its valorization has rarely been the focus of *** study demonstrates that SS could be a promising raw material for biodiesel production and a biochar catalyst to promote the reaction kinetics of *** induced transesterification of the SS extract(SSe)was performed in comparison with the conventional homogeneous *** biochar was fabricated via *** highest yield(33.5 wt.%per SSe)of biodiesel production was achieved in 1 min of reaction at 305℃via thermally induced transesterification in the presence of SS biochar,while the yield of biodiesel from(trans)esterification with 5 wt.%H_(2)SO_(4)was less than 1%even after 24 *** reaction kinetics(ermally induced transesterification was extraordinarily faster than that of conventional transesterification(3-24 h).The porous structure and high content of alkaline species in the SS biochar expedited the reaction ***,the integrated/hybridized process for thermally induced transesterification and pyrolysis of the solid residue of SS was experimentally proved for the valorization of SS in this *** that SS is being disposed of as a waste material and generates toxic chemicals in the environment,its valorization into value-added biodiesel and a catalyst could be an environmentally benign and sustainable technique.

关键词： Circular economy Waste-to-energy Biochar catalyst Biodiesel Wastewater treatment

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Removal of toxic elements from aqueous environments using nano zero-valent iron-and iron oxide-modified biochar:a review

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Biochar 2022年第1期4卷 779-799页

作者： Sabry M.Shaheen Ahmed Mosa Natasha Hamada Abdelrahman Nabeel Khan Niazi Vasileios Antoniadis Muhammad Shahid Hocheol Song eilhann e.kwon Jörg Rinklebe Laboratory of Soil-and Groundwater-Management Institute of Foundation EngineeringWater-and Waste-ManagementSchool of Architecture and Civil EngineeringUniversity of WuppertalPauluskirchstraße 742285 WuppertalGermany Department of Arid Land Agriculture Faculty of MeteorologyEnvironmentand Arid Land AgricultureKing Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Soil and Water Sciences Faculty of AgricultureUniversity of KafrelsheikhKafr El-Sheikh 33516Egypt Soils Department Faculty of AgricultureMansoura UniversityMansoura 35516Egypt Department of environmental Sciences COMSATS University IslamabadVehari CampusVehari 61100Pakistan Soil Science Dept. Faculty of AgricultureCairo UniversityGiza 12613Egypt Institute of Soil and environmental Sciences University of Agriculture FaisalabadFaisalabad 38040Pakistan Department of Agriculture Crop Production and Rural environment University of ThessalyFytokou Street38446VolosGreece Department of environment Energy and GeoinformaticsUniversity of SejongGuangjin-GuSeoul 05006Republic of Korea Department of earth Resources and environmental engineering Hanyang UniversitySeoul 04763Republic of Korea

Biochar(BC)has gained attention for removal of toxic elements(Tes)from aqueous media;however,pristine biochar often exhibits low adsorption ***,various modification strategies in BC have been developed to improve its removal capability against *** zero-valent iron(nZVI)and iron oxides(FeOx)have been used as sorbents for Te ***,these materials are prone to agglomeration and also expensive,which make their usage limited for large-scale *** nZVI technical demerits could be resolved by the development of BC-based composite sorbents through the loading of nZVI or FeOx onto BC *** zero-valent iron modified BC(nZVIBC),FeOx-modified BC(FeOxBC)have attracted attention for their capability in removing pollutants from the aqueous ***,a potential use of nZVIBC and FeOxBC for Te removal from aqueous environments has not been well-realized or *** such,this article reviews:(i)the preparation and characterization of nZVIBC and FeOxBC;(ii)the capacity of nZVIBC and FeOxBC for Te retention in line with their physicochemical properties,and(iii)Te removal mechanisms by nZVIBC and *** nZVI and FeOx in BC increases its sporptive capability of Tes due to surface modifications in morphology,functional groups,and elemental *** combined effects of BC and nZVI,FeOx or Fe salts on the sorption of Tes are complex because they are very specific to *** review identified significant opportunities for research and technol-ogy advancement of nZVIBC and FeOxBC as novel and effective sorbents for the remediation of Tes contaminated water.

关键词： Feedstock engineered biochar Toxic metal(loid)s Biosorption Wastewater remediation

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