Solubility, toxicity, and accumulation of metals from biotite schist rock in <i>Danio rerio</i> fish

Oliveira Filho, Eduardo Cyrino; Muniz, Daphne Heloisa de Freitas; Resende, Álvaro Vilela de; Martins, Eder de Souza

doi:10.1590/S1678-3921.pab2022.v57.01342

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Pesquisa Agropecuária Brasileira

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Sumário

Thematic Issue – Regional Agrominerals, Scientific Notes • Pesq. agropec. bras., Brasília 57 • 2022 • https://doi.org/10.1590/S1678-3921.pab2022.v57.01342 copy

Solubility, toxicity, and accumulation of metals from biotite schist rock in Danio rerio fish

Solubilidade, toxicidade e acumulação de metais da rocha biotita xisto no peixe Danio rerio

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The objective of this work was to determine the solubility of biotite schist rock powder by different methods, as well as the potential toxicity/accumulation of its metals in Danio rerio freshwater fish. Solubility was tested in ultrapure water and in CaCl₂ solution (10 mmol L^-1). Metal contents were analyzed by inductively coupled plasma optical emission spectroscopy. Fish were separated into different groups and then exposed to biotite schist powder. The solubility of toxic elements in water is not lethal, and, 30 days after the end of exposure, there is no accumulation of metals in the fish.

Index terms:
bioaccumulation; bioavailability; ecotoxicology; fertilizers

Group		Al	Co	Cr	Cu	Fe	K	Mn	Ni	Sr	Zn
Group		------------------------------(mg kg^-1)------------------------------
Control 96 hours	Mean	43.25	0.26	12.97	3.41	60.90	7700	28.92	1.33	100.8	326.6
	SD	1.21	0.11	1.48	0.24	2.75	111.5	1.19	0.11	1.13	8.53
	CV	0.03	0.37	0.12	0.08	0.04	0.01	0.04	0.08	0.01	0.03
Control 15 days	Mean	42.53	0.21	11.16	2.40	65.90	8700	27.72	1.01	115.7	288.2
	SD	1.61	0.04	1.04	0.37	4.21	150.4	3.74	0.13	8.20	3.61
	CV	0.04	0.17	0.09	0.16	0.07	0.02	0.15	0.13	0.07	0.01
Control 30 days	Mean	46.04	0.22	14.77	3.14	62.95	7300	26.02	0.97	119.1	306.4
	SD	2.20	0.02	0.44	0.15	2.17	183.9	2.34	0.16	3.91	4.02
	CV	0.05	0.09	0.03	0.05	0.04	0.03	0.10	0.15	0.03	0.01
96 hours exposed	Mean	229.3	0.17	23.05	7.49	215.3	17750	23.33	1.23	112.9	550.5
	SD	4.95	0.01	1.21	0.30	8.83	758.3	1.53	0.16	2.41	15.09
	CV	0.02	0.08	0.06	0.04	0.04	0.08	0.07	0.15	0.03	0.03
15 days after exposure in clean water	Mean	58.70	0.23	15.71	5.39	95.25	8350	22.49	1.38	106.8	318.1
	SD	1.24	0.02	1.02	0.31	2.62	199.8	1.58	0.14	2.16	9.15
	CV	0.02	0.07	0.07	0.06	0.03	0.02	0.07	0.11	0.02	0.03
30 days after exposure in clean water	Mean	36.01	0.17	13.86	3.16	63.55	7500	20.98	0.81	90.73	314.0
	SD	1.24	0.02	0.18	0.11	1.64	187.36	1.09	0.06	1.17	2.85
	CV	0.04	0.08	0.01	0.03	0.03	0.03	0.05	0.07	0.01	0.01

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