佳乐麝香和镉复合污染对土壤中放线菌数量的影响

生态学杂志

佳乐麝香和镉复合污染对土壤中放线菌数量的影响

律泽^1,2,胡筱敏^1**,安婧²,魏炜³

（¹东北大学资源与土木工程学院，沈阳 110004； ^2中国科学院沈阳应用生态研究所污染生态与环境工程重点实验室，沈阳 110016； ^3沈阳建筑大学市政与环境工程学院，沈阳 110168）

出版日期:2014-06-10 发布日期:2014-06-10

Joint effects of galaxolide and cadmium on actinomycetes quantities in soils.

LU Ze^1,2, HU Xiao-min^1**, AN Jing², WEI Wei^3

(¹School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; ²Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; ³School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang 110168, China)

Online:2014-06-10 Published:2014-06-10

摘要/Abstract

摘要：

佳乐麝香是目前备受关注的PPCPs污染物之一，重金属Cd是土壤中常见的重要污染物，两者在土壤生态系统中存在联合暴露的潜在可能性；放线菌是土壤中分布最广数量最多的一类微生物。本研究在实验室模拟条件下，研究了佳乐麝香（HHCB）和Cd单一、复合污染对持续培养10周土壤中放线菌数量的影响，结果发现，HHCB和Cd单一、复合处理对土壤放线菌数量抑制作用显著(P<0.01)，随着HHCB浓度的增加，对土壤放线菌数量的抑制作用增加，其浓度效应关系都呈对数关系，第3周的EC₅₀值最低，前5周的EC₅₀值均不超过10 mg·kg^-1；土壤HHCB和Cd复合污染的联合毒性效应为拮抗作用。本研究表明，在实际风险评价中，应考虑到HHCB输入土壤的特征选择特定的EC₅₀值范围。

关键词: 黑臭水体, 乔司脒, 形成机理, 挥发性有机硫化物, 评价方法

Abstract:

HHCB is one of the most significant PPCPs pollutants concerned by environmental scientists. Meanwhile, Cd is one of the most important heavy metal pollutants existing widely in environment. Combined exposure of HHCB and Cd is possible in the soil ecosystem. However, few studies have been reported regarding the impacts of joint pollution of these two pollutants on soil microbes. In this paper, the joint toxic effects of HHCB and Cd on actinomycetes were studied using soil microcosm for a 10 week duration. Results showed that single and joint effects of HHCB and Cd on actinomycetes quantities in soils were markedly significant (P<0.01). The inhibitory effect of actinomycetes quantities in soils increased with the increase of HHCB concentration under both single and combined treatments of HHCB and Cd. The doseeffect relationship between HHCB and the inhibitory rate of actinomycetes quantity in soils was logarithmic. The EC₅₀ value was the least in the 3rd week after treatment. In the first 5 weeks of incubation, the EC₅₀ values were not more than 10 mg·kg^-1. It was suggested the joint effects of HHCB and Cd were antagonistic. It could be concluded that the input characteristics of HHCB to soils should be considered for selecting a suitable EC₅₀ value for assessing its ecological risks in soils.

Key words: assessment methodology., formation mechanism, VOSCs, Geosmin, black and odorous water body

律泽1,2,胡筱敏1**,安婧2,魏炜3. 佳乐麝香和镉复合污染对土壤中放线菌数量的影响[J]. 生态学杂志.

LU Ze1,2, HU Xiao-min1**, AN Jing2, WEI Wei3. Joint effects of galaxolide and cadmium on actinomycetes quantities in soils.[J]. cje.

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