Production of magnetic biochar from waste-derived fungal biomass for phosphorus removal and recovery

JOURNAL OF CLEANER PRODUCTION

卷:224

Article

Jack, Joshua^1,2  Huggins, Tyler M.¹  Huang, Yingping³  Fang, Yanfen³  Ren, Zhiyong Jason^1,4,5 

[1] Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA

[2] Natl Renewable Energy Lab, Biosci Ctr, Golden, CO USA

[3] Hubei Prov Collaborat Innovat Ctr Geol Hazards &, Yichang, Hubei, Peoples R China

[4] Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA

[5] Princeton Univ, Andlinger Ctr Energy & Environm, Princeton, NJ 08544 USA

关键词: Magnetic biochar;    Iron impregnation;    Neurospora crassa;    Wastewater;    Phosphorus;    Biofabrication;   

DOI  :  10.1016/j.jclepro.2019.03.120

来源: Elsevier

【 摘 要 】

This study presents a new bottom-up biofabrication method to produce highly porous magnetic biochar from waste-derived fungal biomass. Neurospora crassa was grown in iron containing coagulation backwash (BW) diluted with primary effluent (PE) wastewater in two ratios of 1:4 (PE-BW 1:4) and 3:4 (PEBW 3:4). The fungi encapsulated iron directly into biomass hyphae and carbonization resulted in one-step biochar preparation and maghemite (Fe2O3) formation. The morphology and structure of the materials were investigated using a suite of characterization tools. Results indicated that the physiochemical properties of each char were dependent on the blend used for fungal cultivation. PE-BW 1:4 had much larger average pore diameters (13.2 nm vs. 6.1 nm), less elemental surface carbon (2.1% vs. 23.7%), and more expansive Fe2O3 formation. Batch phosphorus adsorption experiments were conducted in the range of 0-90 mg-PAL, and a maximum adsorption density of 23.9 mg/g was achieved. Langmuir, Freundlich and Temkin isotherms were used to describe the interactions of the phosphate on the absorbents and an in-depth error analysis was conducted. Further characterization of the P-loaded chars indicated adsorption primarily via P-OH bonding on the surface of the materials. This new biofabrication method showed great potential to magnetic biochar production with excellent phosphorus adsorption, which can be effectively used in wastewater resource recovery. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

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