摘要
以威廉腔环蚓(Metaphire guillelmi)为试验生物,利用14C标记壬基酚异构体(p353—NP)研究了14C—p353—NP在蚯蚓生物体内累积特征及对蚯蚓生长影响。结果显示:暴露96 d时蚯蚓体内14C—p353—NP含量为4.49~6.73 mg·g^(-1)(以湿重计),生物-土壤蓄积因子为0.95~1.89;当14C—p353—NP处理组暴露浓度为128、160和200 mg·kg^(-1)时,蚯蚓生长抑制率分别为22.03%、24.82%和26.21%,显著高于空白对照组(P<0.05);14C—p353—NP在蚯蚓体内累积总量及其对蚯蚓生长抑制作用受暴露浓度、暴露时间及两者共同作用,且影响显著(P<0.001)。14C—p353—NP可在蚯蚓体内富集,且在亚致死浓度(≤200 mg·kg^(-1))下抑制蚯蚓的生长。该研究结果可为土壤p353—NP生物毒性和生态风险评价提供基础数据。
A laboratory experiment was conducted using14C-tracer to investigate bioaccumulation of14C—p353—NP in Metaphire guillelmi and its influence on growth of the worm. Results show that after 96 days of exposure,the concentration of14C—p353—NP in Metaphire guillelmi was measured to be 4. 45 ~ 6. 79 mg·g^(-1)( wet weight) with BSAF being in the range of 0. 95^(-1). 89. In the14C—p353—NP-treated groups,earthworms exposed to14C—p353—NP,128、160 and 200mg·kg^(-1)in concentration were inhibited significantly in growth( P < 0. 05). Bioaccumulation of14C—p353—NP in Metaphire guillelmi and its inhibitory effect on growth was closely related to concentration of14C—p353—NP in the soil and duration of the exposure and their interaction( P<0. 001). It was found that14C—p353—NP might keep on accumulating in Metaphire guillelmi,and inhibiting its growth till it reached up to its sublethal concentration( ≤200 mg·kg^(-1)).The findings of the research may serve as basic data for assessment of bio-toxicity and ecological risk of p353—NP in soil.
出处
《生态与农村环境学报》
CAS
CSCD
北大核心
2015年第6期935-941,共7页
Journal of Ecology and Rural Environment
基金
江苏省自然基金(BK2012088)
环保公益性行业科研专项(2013467026)
