Effects of Interfaces of Goethite and Humic Acid-Goethite Complex on Microbial Degradation of Methyl Parathion
Microbial degradation plays an essential role in the removal of hydrophobic organic compounds (HOCs) dispersed in soil and sediment, and its performance is greatly affected by mineral particles which regulate HOCs bioavailability by interfacial adsorption. Likewise, bacteria cells attach to the surf...
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| Format: | Article |
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Frontiers Media S.A.
2018-08-01
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| Series: | Frontiers in Microbiology |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fmicb.2018.01748/full |
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| author | Gang Zhao Gang Zhao Enze Li Enze Li Jianjun Li Jianjun Li Meiying Xu Meiying Xu Qiaoyun Huang Xingmin Rong |
| author_facet | Gang Zhao Gang Zhao Enze Li Enze Li Jianjun Li Jianjun Li Meiying Xu Meiying Xu Qiaoyun Huang Xingmin Rong |
| author_sort | Gang Zhao |
| collection | DOAJ |
| description | Microbial degradation plays an essential role in the removal of hydrophobic organic compounds (HOCs) dispersed in soil and sediment, and its performance is greatly affected by mineral particles which regulate HOCs bioavailability by interfacial adsorption. Likewise, bacteria cells attach to the surfaces of mineral particles as well but how bacterial attachment affects biodegradation is largely unknown. Here we report inhibitory effects of goethite and humic acid (HA)-goethite complex addition on microbial degradation of methyl parathion (MP). Using attenuated total reflectance-Fourier transform infrared spectroscopy, we observed that the adhesion of bacterial cells responsible for MP degradation on goethite occurred and the adhesive strength increased over time. We then replaced goethite with phosphate-adsorbed goethite to weaken the goethite-bacteria association and the inhibition of MP biodegradation was alleviated. These results suggested the formation of goethite-bacteria association hinder MP biodegradation. Meanwhile, our results showed that HA coating prevented bacterial attachment on goethite particles along with a drastically increased MP adsorption by goethite. The combined effect would lead to decreased mass fluxes of MP to bacterial cells and could represent another mechanism responsible for the decreased degradation rate observed in the current study. |
| first_indexed | 2024-04-13T05:19:11Z |
| format | Article |
| id | doaj.art-5918a88459d842a3a2a6c63a7b2f3292 |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-04-13T05:19:11Z |
| publishDate | 2018-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-5918a88459d842a3a2a6c63a7b2f32922022-12-22T03:00:48ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2018-08-01910.3389/fmicb.2018.01748389013Effects of Interfaces of Goethite and Humic Acid-Goethite Complex on Microbial Degradation of Methyl ParathionGang Zhao0Gang Zhao1Enze Li2Enze Li3Jianjun Li4Jianjun Li5Meiying Xu6Meiying Xu7Qiaoyun Huang8Xingmin Rong9Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou, ChinaState Key Laboratory of Applied Microbiology Southern China, Guangzhou, ChinaGuangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou, ChinaState Key Laboratory of Applied Microbiology Southern China, Guangzhou, ChinaGuangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou, ChinaState Key Laboratory of Applied Microbiology Southern China, Guangzhou, ChinaGuangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou, ChinaState Key Laboratory of Applied Microbiology Southern China, Guangzhou, ChinaCollege of Resources and Environment, Huazhong Agricultural University, Wuhan, ChinaCollege of Resources and Environment, Huazhong Agricultural University, Wuhan, ChinaMicrobial degradation plays an essential role in the removal of hydrophobic organic compounds (HOCs) dispersed in soil and sediment, and its performance is greatly affected by mineral particles which regulate HOCs bioavailability by interfacial adsorption. Likewise, bacteria cells attach to the surfaces of mineral particles as well but how bacterial attachment affects biodegradation is largely unknown. Here we report inhibitory effects of goethite and humic acid (HA)-goethite complex addition on microbial degradation of methyl parathion (MP). Using attenuated total reflectance-Fourier transform infrared spectroscopy, we observed that the adhesion of bacterial cells responsible for MP degradation on goethite occurred and the adhesive strength increased over time. We then replaced goethite with phosphate-adsorbed goethite to weaken the goethite-bacteria association and the inhibition of MP biodegradation was alleviated. These results suggested the formation of goethite-bacteria association hinder MP biodegradation. Meanwhile, our results showed that HA coating prevented bacterial attachment on goethite particles along with a drastically increased MP adsorption by goethite. The combined effect would lead to decreased mass fluxes of MP to bacterial cells and could represent another mechanism responsible for the decreased degradation rate observed in the current study.https://www.frontiersin.org/article/10.3389/fmicb.2018.01748/fullATR-FTIRgoethiteHA-goethite complexmicrobial degradationmineral interface |
| spellingShingle | Gang Zhao Gang Zhao Enze Li Enze Li Jianjun Li Jianjun Li Meiying Xu Meiying Xu Qiaoyun Huang Xingmin Rong Effects of Interfaces of Goethite and Humic Acid-Goethite Complex on Microbial Degradation of Methyl Parathion Frontiers in Microbiology ATR-FTIR goethite HA-goethite complex microbial degradation mineral interface |
| title | Effects of Interfaces of Goethite and Humic Acid-Goethite Complex on Microbial Degradation of Methyl Parathion |
| title_full | Effects of Interfaces of Goethite and Humic Acid-Goethite Complex on Microbial Degradation of Methyl Parathion |
| title_fullStr | Effects of Interfaces of Goethite and Humic Acid-Goethite Complex on Microbial Degradation of Methyl Parathion |
| title_full_unstemmed | Effects of Interfaces of Goethite and Humic Acid-Goethite Complex on Microbial Degradation of Methyl Parathion |
| title_short | Effects of Interfaces of Goethite and Humic Acid-Goethite Complex on Microbial Degradation of Methyl Parathion |
| title_sort | effects of interfaces of goethite and humic acid goethite complex on microbial degradation of methyl parathion |
| topic | ATR-FTIR goethite HA-goethite complex microbial degradation mineral interface |
| url | https://www.frontiersin.org/article/10.3389/fmicb.2018.01748/full |
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