Journal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Volume 158, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jaap.2021.105263
Keywords
Biochar technologies; Wastewater treatment; Heavy metals; Dyes; Pyrolysis; HTC
Funding
- COST (European Cooperation in Science and Technology) [CA17128]
- European Union [101018756]
- PRIMA program of the European Union
- Marie Curie Actions (MSCA) [101018756] Funding Source: Marie Curie Actions (MSCA)
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Clean water is crucial for life, but with the growing population, demand for it is increasing while reserves are decreasing. Wastewater from industries poses a threat to freshwater reserves and the environment. Activated carbon is a key tool for wastewater treatment and can help produce high purity water.
Clean water is an essential resource for life, and its demand is continuously increasing with the rapid growth in population, while the freshwater reserves are also depleting. A large amount of wastewater is released by different industries, which is affecting the environment as well as polluting the freshwater reserves. Recycling and treatment of wastewater are highly essential to meet the demand for clean water and to protect the environment. Activated carbon can be used in primary, secondary and tertiary wastewater treatment steps. It can be used to capture pollutants which stop microbial activity or to produce clean water with high purity. About 3 million tons of activated carbon are produced per year and it is mainly used for fluid purification. The objective of this review is to investigate the preparation and production of biochar from lignin which is an important resource available in great quantities (about 100 Million tons per year) and the practical application of it for wastewater treatment. Biochar can be produced through pyrolysis (at temperatures of 600-700 degrees C) and hydrothermal carbonization (at temperature between 180-300 degrees C). Subsequent activation can be performed in two ways (physical and chemical), usually at temperatures between 600-800 degrees C. The quality of biochar and activated carbon produced from lignin-rich residue can be very high, even though the costs also are higher respect to other fossil derived materials (carbon black, lignite and pet coke).
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