Influence of Phenanthrene on Cadmium Toxicity to Soil Enzymes and Microbial Growth (5 pp) |
| |
Authors: | Guoqing?Shen Linkui?Cao Email author" target="_blank">Yitong?LuEmail author Jingbo?Hong |
| |
Institution: | (1) Dr. Guoqing Shen Department of Environment and Resource College of Agriculture and Biology Shanghai Jiaotong University No. 2678 Qixin Road Shanghai, 201101 P. R. CHINA,;(2) Dr. Linkui Cao Department of Environment and Resource College of Agriculture and Biology Shanghai Jiaotong University No. 2678 Qixin Road Shanghai, 201101 P. R. CHINA,;(3) Prof. Yitong Lu Department of Environment and Resource College of Agriculture and Biology Shanghai Jiaotong University No. 2678 Qixin Road Shanghai, 201101 P. R. CHINA,;(4) Dr. Jingbo Hong Department of Environment and Resource College of Agriculture and Biology Shanghai Jiaotong University No. 2678 Qixin Road Shanghai, 201101 P. R. CHINA, |
| |
Abstract: | Background Many contaminated sites contain a variety of toxicants. Risk assessment and the development of soil quality criteria therefore
require information on the interaction among toxicants. Interactions between heavy metals are relatively well studied, but
little is known about those between heavy metals and polycyclic aromatic hydrocarbons (PAHs).
Methods 0.1 mg/kg dry soil phenanthrene alone or phenanthrene plus 10 mg/kg cadmium (Cd) were added to soil to determine the influence
of phenanthrene on Cd toxicity to soil enzymes (invertase, urease, dehydrogenase and phosphatase) and microorganisms (fungi,
bacteria and actinomycete) in paddy soil.
Results and Discussion 0.1 mg/kg phenanthrene did not reduce the number of microorganisms. However, the addition of phenanthrene to soil with Cd
enhanced the Cd toxicity to soil enzymes and microorganisms. This deleterious effect was seen to mainly affect the growth
of fungi and the activity of invertase, urease and dehydrogenase. The order of combined inhibition of Cd and phenanthrene
was fungi>bacteria>actinomycete.
Conclusion The presence of phenanthrene might enhance the toxicity of Cd to soil microorganisms. Phenanthrene can easily be used by
the soil actinomycetes as a source of carbon and energy and the finding may be supportive to the development of bioremediation
techniques. |
| |
Keywords: | polycyclic aromatic hydrocarbons (PAHs) cadmium Cd heavy metals soil enzymes microorganisms phenanthrene |
本文献已被 PubMed SpringerLink 等数据库收录! |
|