Hierarchically porous biochar preparation and simultaneous nutrient recovery from sewage sludge via three steps of alkali-activated pyrolysis, water leaching and acid leaching
Resources, Conservation and Recycling(2022)
摘要
•Hierarchically porous biochar was derived from sludge via KHCO3-activated pyrolysis.•Porous biochar prepared at 900 °C has a high specific surface area of 1476.0 m2/g.•Water-soluble potassium salts were formed during KHCO3-activated sludge pyrolysis.•Porous biochar showed a high adsorption rate of 14.4 mg/(g∙min).•Water leaching solution rich in nutrient elements could be reused for plant growth.
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关键词
Sludge pyrolysis,KHCO3 activation,Hierarchically porous biochar,4-chlorophenol,Adsorption performance,Nutrient recovery
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