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Evaluating the potential of KOH-modified composite biochar amendment to alleviate the ecotoxicity of perfluorooctanoic acid-contaminated sediment on Bellamya aeruginosa
- Source :
- Ecotoxicology and Environmental Safety, Vol 219, Iss, Pp 112346-(2021)
- Publication Year :
- 2021
- Publisher :
- Elsevier, 2021.
-
Abstract
- Modified composite biochar offers a cost-effective solution for the remediation of contaminated sediments; however, few studies have evaluated the effects of modified composite biochar amendment on the ecotoxicity of contaminated sediment based on benthic macroinvertebrates. A 21-day sediment toxicity test was conducted using the freshwater snail Bellamya aeruginosa to examine the intrinsic ecotoxicity of a novel KOH-modified composite biochar (KOH-CBC) and its efficacy for reducing the bioavailability, uptake, and ecotoxicity of perfluorooctanoic acid (PFOA). It was found that KOH-CBC is toxic to B. aeruginosa, which may be attributed to its high polycyclic aromatic hydrocarbons (PAHs) content and alkalinity. The addition of KOH-CBC to PFOA-contaminated sediments can markedly reduce the bioavailability and uptake of PFOA by more than 90% and 50%, respectively, and subsequently alleviate the toxicity of PFOA to B. aeruginosa by at least 30%. Increasing the KOH-CBC dosage is not beneficial for further mitigating the toxicity of PFOA-contaminated sediments. Our findings imply that KOH-CBC is a promising sorbent for the in-situ remediation of PFOA-contaminated sediments. Application of acidified KOH-CBC at a dosage of approximately 1–3% will be sufficient to control the ecotoxicity of PFOA; however, its long-term environmental effects should be further validated.
- Subjects :
- Geologic Sediments
Bioavailability
Environmental remediation
Potassium Compounds
Health, Toxicology and Mutagenesis
0211 other engineering and technologies
Amendment
Alkalinity
Biological Availability
Uptake
02 engineering and technology
010501 environmental sciences
01 natural sciences
Environmental pollution
chemistry.chemical_compound
Biochar
parasitic diseases
Hydroxides
GE1-350
Polycyclic Aromatic Hydrocarbons
Environmental Restoration and Remediation
0105 earth and related environmental sciences
021110 strategic, defence & security studies
Fluorocarbons
Benthic macroinvertebrate
Public Health, Environmental and Occupational Health
General Medicine
Pollution
Environmental sciences
chemistry
TD172-193.5
Environmental chemistry
Charcoal
Pseudomonas aeruginosa
Perfluorooctanoic acid
Bellamya aeruginosa
Ecotoxicity
Caprylates
Biomarkers
Subjects
Details
- Language :
- English
- ISSN :
- 01476513
- Volume :
- 219
- Database :
- OpenAIRE
- Journal :
- Ecotoxicology and Environmental Safety
- Accession number :
- edsair.doi.dedup.....8f3c2f6cad620cf203ed976126ba9d3b