Plant uptake and in-soil degradation of PCB-5 under varying cropping conditions

Li, Huashou and Liu, Longyuan and Lin, Chuxia and Wang, Shaorui (2011) Plant uptake and in-soil degradation of PCB-5 under varying cropping conditions. Chemosphere, 84 (7). pp. 943-949. ISSN 0045-6535

Abstract

A 60-d greenhouse experiment was conducted to investigate the uptake and in-soil degradation of PCB-5 under single cropping and intercropping conditions involving three crop plant species: pumpkin, soybean and corn. Volatilization of PCB-5 from the soil surface was also tested. The results show that while uptake of PCB-5 by the test plant species is possible and the root concentration of PCB-5 had a control on the upward transport of PCB-5 to the above-ground portion of the plants, the PCB-5 extracted by the plants mainly accumulated in the root materials. Phytoextraction contributed insignificantly toward the loss of the soil-borne PCB-5. Volatilization of PCB-5 from the soil was recorded but it appeared that this did not result in a marked loss of PCB-5 in the bulk soil though it might cause remarkable removal of PCB-5 in a thin layer of the topsoil (1 mm). It is likely that the in-soil biodegradation contributed markedly to the observed reduction in soil-borne PCB-5. The in-soil biodegradation of PCB-5 was significantly enhanced under intercropping conditions, which appeared to be related to increased microbial activities, particularly bacterial activities. The soil residual PCB-5 was correlated with the activity of the following enzymes: catalase (CAT), polyphenol oxidase (PPO) and peroxidase (POD).


Statistics for USQ ePrint 19428
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version due to publisher copyright policy.
Depositing User: Dr Chuxia Lin
Faculty / Department / School: Historic - Faculty of Sciences - No Department
Date Deposited: 05 Aug 2011 11:36
Last Modified: 03 Jul 2013 00:44
Uncontrolled Keywords: polychlorinated biphenyl; intercropping; biodegradation; phytoextraction; organic pollutant; soil; organic pollutants
Fields of Research (FOR2008): 05 Environmental Sciences > 0503 Soil Sciences > 050304 Soil Chemistry (excl. Carbon Sequestration Science)
05 Environmental Sciences > 0502 Environmental Science and Management > 050299 Environmental Science and Management not elsewhere classified
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9614 Soils > 961402 Farmland, Arable Cropland and Permanent Cropland Soils
Identification Number or DOI: doi: 10.1016/j.chemosphere.2011.06.007
URI: http://eprints.usq.edu.au/id/eprint/19428

Actions (login required)

View Item Archive Repository Staff Only