Lindane degradation in wet-dry cycling soil as affected by aging and microbial toxicity of biochar
This study determined the degradation of lindane in soil amended with biochar to evaluate the effects of biochar aging and microbial toxicity. Two biochars were prepared at 400 and 600 °C (BC400 and BC600) and subjected to acid washing to remove nutrition (WBC400 and WBC600). After 89 days of incuba...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-08-01
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| Series: | Ecotoxicology and Environmental Safety |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651321004863 |
| _version_ | 1819005220746690560 |
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| author | Anfei He Zilan Zhang Qi Yu Kan Yang G. Daniel Sheng |
| author_facet | Anfei He Zilan Zhang Qi Yu Kan Yang G. Daniel Sheng |
| author_sort | Anfei He |
| collection | DOAJ |
| description | This study determined the degradation of lindane in soil amended with biochar to evaluate the effects of biochar aging and microbial toxicity. Two biochars were prepared at 400 and 600 °C (BC400 and BC600) and subjected to acid washing to remove nutrition (WBC400 and WBC600). After 89 days of incubation under the alternate “wet–dry” conditions, scanning electron microscopy showed that acid washing rendered biochars especially susceptible to aging with structural collapse and fragmentation, with less surface covering. Aging impeded the release of toxic substances in BC400 and BC600 with reduced toxicity to degrading microorganisms. Lindane degradation was somewhat stimulated by biochar nutrition but mainly inhibited by adsorption. Acid washing facilitated the release of toxic substances and additionally reduced lindane degradation. The variations in fatty acid saturation degree (SFA/UFA) in soils confirmed the microbial toxicity of 5% WBC400 > 5% BC400 > 5% BC600 > 5% WBC600. High-throughput DNA sequencing showed that biochar delayed the formation of dominant degrading microbial communities in soil. Lindane degradation was completed by joint Sphingomonas, Flaviolibacter, Parasegetibacter, Azoarcus, Bacillus and Anaerolinaea. These findings are helpful for better understanding the effect of biochar in soil on long-term degradation of persistent organic pollutants. |
| first_indexed | 2024-12-20T23:49:20Z |
| format | Article |
| id | doaj.art-4e4f836a480e4e89a89708160859863f |
| institution | Directory Open Access Journal |
| issn | 0147-6513 |
| language | English |
| last_indexed | 2024-12-20T23:49:20Z |
| publishDate | 2021-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj.art-4e4f836a480e4e89a89708160859863f2022-12-21T19:22:52ZengElsevierEcotoxicology and Environmental Safety0147-65132021-08-01219112374Lindane degradation in wet-dry cycling soil as affected by aging and microbial toxicity of biocharAnfei He0Zilan Zhang1Qi Yu2Kan Yang3G. Daniel Sheng4School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, ChinaSchool of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, ChinaState Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaSchool of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, ChinaSchool of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, China; Corresponding author.This study determined the degradation of lindane in soil amended with biochar to evaluate the effects of biochar aging and microbial toxicity. Two biochars were prepared at 400 and 600 °C (BC400 and BC600) and subjected to acid washing to remove nutrition (WBC400 and WBC600). After 89 days of incubation under the alternate “wet–dry” conditions, scanning electron microscopy showed that acid washing rendered biochars especially susceptible to aging with structural collapse and fragmentation, with less surface covering. Aging impeded the release of toxic substances in BC400 and BC600 with reduced toxicity to degrading microorganisms. Lindane degradation was somewhat stimulated by biochar nutrition but mainly inhibited by adsorption. Acid washing facilitated the release of toxic substances and additionally reduced lindane degradation. The variations in fatty acid saturation degree (SFA/UFA) in soils confirmed the microbial toxicity of 5% WBC400 > 5% BC400 > 5% BC600 > 5% WBC600. High-throughput DNA sequencing showed that biochar delayed the formation of dominant degrading microbial communities in soil. Lindane degradation was completed by joint Sphingomonas, Flaviolibacter, Parasegetibacter, Azoarcus, Bacillus and Anaerolinaea. These findings are helpful for better understanding the effect of biochar in soil on long-term degradation of persistent organic pollutants.http://www.sciencedirect.com/science/article/pii/S0147651321004863BiocharSoilLindaneAgingMicrobial communityWet-dry cycling |
| spellingShingle | Anfei He Zilan Zhang Qi Yu Kan Yang G. Daniel Sheng Lindane degradation in wet-dry cycling soil as affected by aging and microbial toxicity of biochar Ecotoxicology and Environmental Safety Biochar Soil Lindane Aging Microbial community Wet-dry cycling |
| title | Lindane degradation in wet-dry cycling soil as affected by aging and microbial toxicity of biochar |
| title_full | Lindane degradation in wet-dry cycling soil as affected by aging and microbial toxicity of biochar |
| title_fullStr | Lindane degradation in wet-dry cycling soil as affected by aging and microbial toxicity of biochar |
| title_full_unstemmed | Lindane degradation in wet-dry cycling soil as affected by aging and microbial toxicity of biochar |
| title_short | Lindane degradation in wet-dry cycling soil as affected by aging and microbial toxicity of biochar |
| title_sort | lindane degradation in wet dry cycling soil as affected by aging and microbial toxicity of biochar |
| topic | Biochar Soil Lindane Aging Microbial community Wet-dry cycling |
| url | http://www.sciencedirect.com/science/article/pii/S0147651321004863 |
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