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Chronic toxicity of 50 metals to Ceriodaphnia dubia
Journal of Applied Toxicology ( IF 3.3 ) Pub Date : 2020-10-09 , DOI: 10.1002/jat.4049
Akira Okamoto 1 , Shigeki Masunaga 2 , Norihisa Tatarazako 1, 3
Affiliation  

Metals are essential elements for human life but may cause disorders when exposure is excessive. Previously, we reported on the acute toxicity of 50 metals; however, the chronic toxicity data of some metals are not available. Therefore, we conducted chronic toxicity tests to determine the effects of 50 metals on the water flea, Ceriodaphnia dubia. The IC20 of 20 metals (Be, Sc, Cr, Co, Ni, Cu, Zn, Y, Ru, Ag, Cd, In, Te, W, Os, Pt, Au, Hg, Tl and Pb) were <100 μg/L; nine metals (Al, V, As, Se, Zr, Nb, Rh, Sb and Bi) were 100 ≤ IC20 < 1000 μg/L; 16 metals (Li, Mg, K, Ti, Mn, Fe, Ga, Ge, Rb, Sr, Mo, Sn, Cs, Ba, Re and Ir) were 1000 ≤ IC20 ≤ 100 000 μg/L; and two metals (Na and Ca) were >100 000 μg/L. Three metals (Pd, Hf and Ta) did not show IC20 at the upper limit of respective aqueous solubility, and IC20s were not obtained. The maximum test concentrations (almost aqueous solubility) of Pd, Hf and Ta were 83, 2400 and 5.3 μg/L, respectively. These data show the high correlation between our IC50s for C. dubia and those for Dahpnia magna published previously. The IC50s of 47 metals were not correlated with electronegativity, first ionization energy, atomic weight, atomic number, covalent radius, atomic radius or ionic radius.

中文翻译:

50 种金属对 Ceriodaphnia dubia 的慢性毒性

金属是人类生活必不可少的元素,但如果接触过多,可能会导致疾病。此前,我们报道了 50 种金属的急性毒性;然而,某些金属的慢性毒性数据不可用。因此,我们进行了慢性毒性测试,以确定 50 种金属对水蚤Ceriodaphnia dubia 的影响20种金属(Be、Sc、Cr、Co、Ni、Cu、Zn、Y、Ru、Ag、Cd、In、Te、W、Os、Pt、Au、Hg、Tl 和 Pb)的 IC 20 <100微克/升;九种金属(Al、V、As、Se、Zr、Nb、Rh、Sb 和 Bi)的 100 ≤ IC 20 < 1000 μg/L; 16 种金属(Li、Mg、K、Ti、Mn、Fe、Ga、Ge、Rb、Sr、Mo、Sn、Cs、Ba、Re 和 Ir) 1000 ≤ IC 20≤ 100 000 微克/升;和两种金属(Na 和 Ca)>100 000 μg/L。三种金属(Pd、Hf和Ta)在各自的水溶解度上限处未显示IC 20,并且未获得IC 20 s。Pd、Hf 和 Ta 的最大测试浓度(几乎是水溶性)分别为 83、2400 和 5.3 μg/L。这些数据显示了我们对C. dubia 的IC 50 s与之前发表的Dahpnia magna 的IC 50之间的高度相关性。47种金属的IC 50 s与电负性、第一电离能、原子量、原子序数、共价半径、原子半径或离子半径无关。
更新日期:2020-10-09
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