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首页> 外文期刊>Environmental toxicology and chemistry >THE TOXICITY OF DIFFERENT LEAD SALTS TO ENCHYTRAEUS CRYPTICUS IN RELATION TO BIOAVAILABILITY IN SOIL
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THE TOXICITY OF DIFFERENT LEAD SALTS TO ENCHYTRAEUS CRYPTICUS IN RELATION TO BIOAVAILABILITY IN SOIL

机译：不同铅盐对肠球菌的毒性与土壤生物利用度的关系

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The present study aimed to assess the bioavailability and toxicity of lead nitrate and lead chloride to Enchytraeus crypticus in a natural standard soil. Worms were exposed to Pb-spiked soil for 21 d, and survival and reproduction were related to total, 0.01 M CaCl2-extractable, and porewater Pb concentrations in the soil and internal concentrations in the surviving animals. The Pb availability for Pb(NO3)(2) and PbCl2 was similar, as confirmed by Langmuir and Freundlich isotherms. The Pb concentrations in surviving worms increased with increasing Pb concentrations in the soil and did not differ for the 2 Pb salts. Lead was toxic to E. crypticus at median lethal concentrations (LC50s) of 543 and 779 mg Pb/kg dry soil and median effect concentrations (EC50s) of 189 and 134 mg Pb/kg dry soil, for Pb(NO3)(2) and PbCl2, respectively. Mortality of E. crypticus was related to internal Pb concentrations in the worms rather than to total or available Pb concentrations in the soil, whereas reproduction toxicity was better explained from Pb concentrations in 0.01 M CaCl2 extracts or porewater of the test soil than from total Pb concentrations in the soil or Pb concentrations in the worms. Overall, the bioavailability and toxicity of Pb(NO3)(2) and PbCl2 to E. crypticus in LUFA 2.2 soil did not differ. (C) 2017 SETAC
机译：本研究旨在评估硝酸铅和氯化铅对天然标准土壤中棘孢隐藻的生物利用度和毒性。蠕虫暴露在掺有Pb的土壤中21 d，其存活和繁殖与土壤中总Pb，0.01 M CaCl2可萃取物和孔隙中Pb的浓度以及存活动物体内的浓度有关。 Langmuir和Freundlich等温线证实，Pb（NO3）（2）和PbCl2的铅可用性相似。存活的蠕虫中的Pb浓度随土壤中Pb浓度的增加而增加，并且对于2种Pb盐而言没有差异。对于Pb（NO3），铅在543和779 mg Pb / kg干燥土壤的中位致死浓度（LC50s）和189和134 mg Pb / kg干燥土壤的中位有效浓度（EC50s）时对隐孢菌有毒（2）（2）和PbCl2。隐孢子虫的死亡率与蠕虫中的内部Pb浓度有关，而不是与土壤中的总Pb或有效Pb浓度有关，而从0.01 M CaCl2提取物或被测土壤的孔隙水中的Pb浓度比总Pb更好地解释了繁殖毒性。土壤中的铅浓度或蠕虫中的铅浓度。总体而言，LUFA 2.2土壤中Pb（NO3）（2）和PbCl2对隐孢子虫的生物利用度和毒性没有差异。 （C）2017年SETAC

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