Tags

Type your tag names separated by a space and hit enter

Shorter interval and multiple flooding-drying cycling enhanced the mineralization of 14C-DDT in a paddy soil.

Abstract

DDT and its main metabolites (DDTs) are still the residual contaminants in soil. Sequential anaerobic-aerobic cycling has long been approved for enhancing the degradation of DDTs in soil. However, there is a lack of study investigating whether anaerobic-aerobic cycling would enhance the mineralization of DDT, and what a kind of anaerobic-aerobic management regimes would be optimal. To fill these gaps, the fate of 14C-DDT under different flooding-drying cycles was examined in a paddy soil by monitoring its mineralization and bioavailability. The results show the total mineralization of 14C-DDT in 314 days accounted for 1.01%, 1.30%, and 1.41%, individually for the treatments subjected to one, two, and three flooding-drying cycles. By comparison, the treatment subjected to the permanently aerobic phase had only 0.12% cumulative mineralization. Shorter intervals and multiple flooding-drying cycles enhanced the mineralization of 14C-DDT, however, reduced its bioavailability. Therefore, the enhanced mineralization was explained from an abiotic pathway as predicted by the one-electron reduction potential (E1), the Fukui function for nucleophilic attack (f+) and the steps for anaerobic decarboxylation. From a practical view, it is important to investigate how the anaerobic-aerobic interval and frequency would affect the degradation and mineralization of DDT, which is very essential in developing remediation strategies.

Links

  • Publisher Full Text
  • Authors+Show Affiliations

    ,

    School of the Environment Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing 210008, China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Helmholtz Zentrum München, German Research Center for Environmental Health, Research Unit Microbe-Plant Interactions, Neuherberg 85764, Germany. Electronic address: xjin@nju.edu.cn.

    ,

    Helmholtz Zentrum München, German Research Center for Environmental Health, Research Unit Microbe-Plant Interactions, Neuherberg 85764, Germany; Department of Chemistry, Maseno University, Maseno 40105, Kenya.

    ,

    School of the Environment Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing 210008, China.

    ,

    Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China.

    ,

    Helmholtz Zentrum München, German Research Center for Environmental Health, Research Unit Microbe-Plant Interactions, Neuherberg 85764, Germany.

    ,

    Lehrstuhl für Grünlandlehre, Technische Universität München, Fresing D-85350, Germany.

    ,

    School of the Environment Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing 210008, China.

    Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China.

    Source

    The Science of the total environment 676: 2019 Aug 01 pg 420-428

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    31048172

    Citation

    Jin, Xin, et al. "Shorter Interval and Multiple Flooding-drying Cycling Enhanced the Mineralization of 14C-DDT in a Paddy Soil." The Science of the Total Environment, vol. 676, 2019, pp. 420-428.
    Jin X, Kengara FO, Yue X, et al. Shorter interval and multiple flooding-drying cycling enhanced the mineralization of 14C-DDT in a paddy soil. Sci Total Environ. 2019;676:420-428.
    Jin, X., Kengara, F. O., Yue, X., Wang, F., Schroll, R., Munch, J. C., ... Jiang, X. (2019). Shorter interval and multiple flooding-drying cycling enhanced the mineralization of 14C-DDT in a paddy soil. The Science of the Total Environment, 676, pp. 420-428. doi:10.1016/j.scitotenv.2019.04.284.
    Jin X, et al. Shorter Interval and Multiple Flooding-drying Cycling Enhanced the Mineralization of 14C-DDT in a Paddy Soil. Sci Total Environ. 2019 Aug 1;676:420-428. PubMed PMID: 31048172.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Shorter interval and multiple flooding-drying cycling enhanced the mineralization of 14C-DDT in a paddy soil. AU - Jin,Xin, AU - Kengara,Fredrick O, AU - Yue,Xianhui, AU - Wang,Fang, AU - Schroll,Reiner, AU - Munch,Jean C, AU - Gu,Cheng, AU - Jiang,Xin, Y1 - 2019/04/23/ PY - 2019/02/28/received PY - 2019/04/18/revised PY - 2019/04/19/accepted PY - 2019/5/3/pubmed PY - 2019/5/3/medline PY - 2019/5/4/entrez KW - (14)C-DDT KW - Anaerobic-aerobic cycling KW - DFT calculation KW - Mineralization SP - 420 EP - 428 JF - The Science of the total environment JO - Sci. Total Environ. VL - 676 N2 - DDT and its main metabolites (DDTs) are still the residual contaminants in soil. Sequential anaerobic-aerobic cycling has long been approved for enhancing the degradation of DDTs in soil. However, there is a lack of study investigating whether anaerobic-aerobic cycling would enhance the mineralization of DDT, and what a kind of anaerobic-aerobic management regimes would be optimal. To fill these gaps, the fate of 14C-DDT under different flooding-drying cycles was examined in a paddy soil by monitoring its mineralization and bioavailability. The results show the total mineralization of 14C-DDT in 314 days accounted for 1.01%, 1.30%, and 1.41%, individually for the treatments subjected to one, two, and three flooding-drying cycles. By comparison, the treatment subjected to the permanently aerobic phase had only 0.12% cumulative mineralization. Shorter intervals and multiple flooding-drying cycles enhanced the mineralization of 14C-DDT, however, reduced its bioavailability. Therefore, the enhanced mineralization was explained from an abiotic pathway as predicted by the one-electron reduction potential (E1), the Fukui function for nucleophilic attack (f+) and the steps for anaerobic decarboxylation. From a practical view, it is important to investigate how the anaerobic-aerobic interval and frequency would affect the degradation and mineralization of DDT, which is very essential in developing remediation strategies. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/31048172/Shorter_interval_and_multiple_flooding-drying_cycling_enhanced_the_mineralization_of_14C-DDT_in_a_paddy_soil L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(19)31819-4 DB - PRIME DP - Unbound Medicine ER -