摘要
通过GC/MS法测定了广东清远龙塘镇电子垃圾回收区水生昆虫和水体中短链氯化石蜡(SCCPs)和中链氯化石蜡(MCCPs)的浓度水平.结果显示,4种水生昆虫体内∑SCCPs和∑MCCPs的浓度范围分别为52—410ng·g^(-1) ww(湿重)和40—740ng·g^(-1) ww(湿重),其中,蟌科幼虫的∑SCCPs浓度最高,水龟虫的∑MCCPs浓度最高.主成分分析表明,不同种类水生昆虫中SCCP和MCCP同系物的组成特征表现出种间特异性,可能是由于食性、摄食习性或富集能力的不同.水生昆虫中∑SCCPs和∑MCCPs的生物富集因子(lg BAFs值)的范围分别为3.27—3.79和2.62—3.34.蜻科幼虫中∑SCCPs和∑MCCPs的lgBAFs值均小于多氯联苯(∑PCBs, 4.87)和多溴联苯醚(∑PBDEs,4.65),说明在水生昆虫中SCCPs和MCCPs的生物富集潜力低于PCBs和PBDEs. SCCPs和MCCPs同系物的BAFs值与辛醇/水分配系数(K_(OW))和碳链长度(C_(10-17))均呈显著负相关(P <0.05),表明化合物的理化性质影响了水生昆虫对SCCPs和MCCPs的积累,低KOW和低碳链长度的同系物更容易被生物富集.
The concentrations of short-chain chlorinated paraffins(SCCPs) and medium-chain chlorinated paraffins(MCCPs) in aquatic insects and water from an electronic waste recycling site in Longtang Town, Qingyuan County of Guangdong Province were determined using gas chromatographic-mass spectrometric(GC/MS). The results showed that ∑SCCPs and ∑MCCPs concentrations in aquatic insects were range from 52 ng·g^(-1) to 410 ng·g^(-1) and 40 ng·g^(-1) to 740 ng·g^(-1) wet weight(ww), respectively. Damselfly larvae have the highest level of ∑SCCPs and the highest level of ∑MCCPs was found in waterbeetles. Principal component analysis was conducted, and species-specific different composition patterns of SCCP and MCCP congeners were seen among aquatic insects. This may be due to differences in diet, feeding habits and bioaccumulation ability among different species. Bioaccumulation factor(BAF) values of ∑SCCPs and ∑MCCPs in aquatic insects were range from 3.27 to 3.79 and 2.62 to 3.34, respectively. BAFs of ∑SCCPs and ∑MCCPs in dragonfly larvae were lower than that of ∑PCBs(4.87) and ∑PBDEs(4.65), suggesting the bioaccumulation potential of SCCPs and MCCPs was below that of PCBs and PBDEs in aquatic insects. Significant negatively correlations(P < 0.05) were observed between BAF values and octanol-water partition coefficient(K_(OW)) and carbon-chain length(C_(10-17)) of SCCPs and MCCPs.Those results indicated that the physicochemical properties of compounds affected the bioaccumulation of SCCPs and MCCPs by aquatic insects, and homologues with low KOW and low carbon chain length were preferred to bioaccumulation.
作者
刘煜
王启宇
吴永明
杨春燕
罗孝俊
麦碧娴
LIU Yu;WANG Qiyu;WU Yongming;YANG Chunyan;LUO Xiaojun;MAI Bixian(Research Institute of Poyang Lake,Jiangxi Academy of Sciences,Nanchang,330096,China;State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou,510640,China)
出处
《环境化学》
CAS
CSCD
北大核心
2021年第10期3037-3045,共9页
Environmental Chemistry
基金
国家自然科学基金(41877386,41931290)
中央引导地方科技发展专项资金(20192ZDD01001)
江西省自然科学基金(20192BAB213026)
江西省科学院协同创新专项普惠制项目(2018-XTPH1-20)资助。
