Low-Cost Biochar Adsorbents for Water Purification Including Microplastics Removal

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Siipola , V , Pflugmacher , S , Romar , H , Wendling , L & Koukkari , P 2020 , ' Low-Cost Biochar Adsorbents for Water Purification Including Microplastics Removal ' , Applied sciences , vol. 10 , no. 3 , 788 . https://doi.org/10.3390/app10030788

Title: Low-Cost Biochar Adsorbents for Water Purification Including Microplastics Removal
Author: Siipola, Virpi; Pflugmacher, Stephan; Romar, Henrik; Wendling, Laura; Koukkari, Pertti
Other contributor: University of Helsinki, Ecosystems and Environment Research Programme



Date: 2020-02
Language: eng
Number of pages: 18
Belongs to series: Applied sciences
ISSN: 2076-3417
DOI: https://doi.org/10.3390/app10030788
URI: http://hdl.handle.net/10138/319444
Abstract: The applicability of steam activated pine and spruce bark biochar for storm water and wastewater purification has been investigated. Biochar samples produced from the bark of scots pine (Pinus sylvestrus) and spruce (Picea spp.) by conventional slow pyrolysis at 475 degrees C were steam activated at 800 degrees C. Steam activation was selected as a relatively inexpensive method for creating porous biochar adsorbents from the bark-containing sidestreams of the wood refining industry. A suite of standard analytical procedures were carried out to quantify the performance of the activated biochar in removing both cations and residual organics from aqueous media. Phenol and microplastics retention and cation exchange capacity were employed as key test parameters. Despite relatively low surface areas (200-600 m(2)/g), the steam-activated biochars were highly suitable adsorbents for the chemical species tested as well as for microplastics removal. The results indicate that ultra-high porosities are not necessary for satisfactory water purification, supporting the economic feasibility of bio-based adsorbent production.
Subject: biochar
activated carbon
steam activation
phenol adsorption
microplastics
bark
ACTIVATED CARBON
EUCALYPTUS-GLOBULUS
AQUEOUS-SOLUTIONS
STEAM ACTIVATION
ADSORPTION
PYROLYSIS
BIOMASS
CARBONIZATION
PHENOL
BARK
1172 Environmental sciences
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