The impact of modified nano-carbon black on the earthworm Eisenia fetida under turfgrass growing conditions: Assessment of survival, biomass, and antioxidant enzymatic activities.
The impact of modified nano-carbon black on the earthworm Eisenia fetida under turfgrass growing conditions: Assessment of survival, biomass, and antioxidant enzymatic activities.
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DOI：
10.1016/j.jhazmat.2017.05.035
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发表时间：
2017-09
影响因子：
13.6
通讯作者：
Shulan Zhao;Lu He;Yunfeng Lu;L. Duo
中科院分区：
文献类型：
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作者：
Shulan Zhao;Lu He;Yunfeng Lu;L. Duo
改性纳米碳吸附剂对金属离子具有良好的吸附性能，已被用于土壤重金属的固定化。然而，尚未对土壤生物进行广泛的风险评估。为评价3种改性纳米炭黑（SCB、NCB和KCB）对土壤生物的毒性效应，在室内试验条件下，采用添加5%H2SO4-、HNO 3-和KMnO 4的改性纳米炭黑（SCB、NCB和KCB）对蚯蚓进行处理。系统地研究了蚯蚓的存活率、生物量以及超氧化物歧化酶（SOD）、过氧化物酶（POD）和过氧化氢酶（CAT）的活性。SCB和NCB的毒性和生态危害性更大。在35天和60天的暴露后，观察到生物量和存活率显着下降，存活率显示出随暴露持续时间下降的趋势。在35 d和60 d时，改性纳米炭末处理对SOD、CAT和POD活性均有抑制作用，说明改性纳米炭末处理诱导了氧化胁迫。结果表明，添加5%改性纳米炭黑的土壤对蚯蚓有潜在的危害，应引起重视。
Modified nano-carbon adsorbents have been employed in the immobilization of heavy metals in soil due to their good adsorption capabilities regarding metal ions. However, an assessment of their risks has not been extensively performed with soil organisms. To assess the toxic effects of three types of modified nano-carbon black (CB) on soil organisms, a laboratory test was conducted to expose the earthwormEisenia fetidato artificial soil supplemented with 5% H2SO4-, HNO3- and KMnO4-modified nano-CB (SCB, NCB and KCB, respectively) under turfgrass growing conditions. The tested earthworms were systematically investigated for survival, biomass and the activities of antioxidant enzymes, including superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT). SCB and NCB were found to be more toxic and ecologically dangerous toE. fetidabecause significant decreases in biomass and survival were observed after 35- and 60-d exposures and the survival rate showed a tendency to decrease with exposure duration. The activities of SOD, CAT and POD were inhibited in all treatments with modified nano-CBs at 35- and 60-d, which indicated that oxidative stress was induced by modified nano-CBs. The results suggest that there is potential harm to earthworms in soil with 5% modified nano-CB and that it deserves special attention.