Journal article
Nickel Hyperaccumulator Biochar Sorbs Ni(II) from Water and Wastewater to Create an Enhanced Bio-ore
ACS Environmental Au, Vol.3(1), pp.24-33
01/18/2023
DOI: 10.1021/acsenvironau.2c00028
PMCID: PMC9853938
PMID: 36691654
Appears in UI Libraries Support Open Access
Abstract
Nickel (Ni) hyperaccumulators make up the largest proportion of hyperaccumulator plant species; however, very few biochar studies with hyperaccumulator feedstock have examined them. This research addresses two major hypotheses: (1) Biochar synthesized from the Ni hyperaccumulator Odontarrhena chalcidica grown on natural, metal-rich soil is an effective Ni sorbent due to the plant’s ability to bioaccumulate soluble and exchangeable cations; and (2) such biochar can sorb high concentrations of Ni from complex solutions. We found that O. chalcidica grew on sandy, nutrient-poor soil from a Minnesota mining district but did not hyperaccumulate Ni. Biochar prepared from O. chalcidica biomass at a pyrolysis temperature of 900 °C sorbed up to 154 mg g–1 of Ni from solution, which is competitive with the highest-performing Ni sorbents in recent literature and the highest of any unmodified, plant-based biochar material reported in the literature. Precipitation, cation exchange, and adsorption mechanisms contributed to removal. Ni was effectively removed from acidic solutions with initial pH > 2 within 30 min. O. chalcidica biochar also removed Ni(II) from a simulated Ni electroplating rinsewater solution. Together, these results provide evidence for O. chalcidica biochar as an attractive material for simultaneously treating high-Ni wastewater and forming an enhanced Ni bio-ore.
Details
- Title: Subtitle
- Nickel Hyperaccumulator Biochar Sorbs Ni(II) from Water and Wastewater to Create an Enhanced Bio-ore
- Creators
- Rachel A. Smoak - University of IowaJerald L. Schnoor - University of Iowa
- Resource Type
- Journal article
- Publication Details
- ACS Environmental Au, Vol.3(1), pp.24-33
- DOI
- 10.1021/acsenvironau.2c00028
- PMID
- 36691654
- PMCID
- PMC9853938
- NLM abbreviation
- ACS Environ Au
- ISSN
- 2694-2518
- eISSN
- 2694-2518
- Publisher
- American Chemical Society
- Grant note
- DOI: 10.13039/100000001, name: National Science Foundation, award: 1546595, 1633098
- Language
- English
- Electronic publication date
- 09/16/2022
- Date published
- 01/18/2023
- Academic Unit
- Civil and Environmental Engineering; Occupational and Environmental Health
- Record Identifier
- 9984353738802771
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