Lead solubility in seawater: an experimental study
Brad M. Angel A , Simon C. Apte A C , Graeme E. Batley A and Mark D. Raven BA CSIRO Land and Water, Locked Bag 2007, Kirrawee, NSW 2232, Australia.
B CSIRO Land and Water, Gate 4, Waite Road, Urrbrae, SA 5064, Australia.
C Corresponding author. Email: simon.apte@csiro.au
Environmental Chemistry 13(3) 489-495 https://doi.org/10.1071/EN15150
Submitted: 14 July 2015 Accepted: 15 September 2015 Published: 30 November 2015
Journal Compilation © CSIRO Publishing 2016 Open Access CC BY-NC-ND
Environmental context. Many trace metals including lead are only sparingly soluble in seawater and may exist in both dissolved and particulate forms (e.g. as precipitates). Aquatic organisms may experience different toxic effects from exposure to dissolved and particulate trace metals. This study reports the limits to lead solubility in seawater that influence the exposure to these forms of lead in the field and the laboratory.
Abstract. A combination of laboratory investigations and thermodynamic modelling were conducted in order to gain an understanding of the factors controlling lead solubility in seawater. In experiments where increasing amounts of lead were added to seawater (in order to avoid supersaturation) and equilibrated for up to 28 days, the maximum solubility was ~2 mg L–1 (pH 8.15, 22 °C). However, at higher added lead concentrations, which caused the rapid formation of lead precipitates, the solution chemistry became dynamic and the observed solubility was markedly lower, varying with both reaction time and precipitate concentration. For instance, when seawater solutions were spiked with 10 mg L–1 of total lead, precipitation occurred immediately and only 1.6 mg L–1 of dissolved lead was measured after 1 h, with this concentration decreasing to 1.3 mg L–1 after 28 days. The solubility of lead in artificial seawater (0.68 mg L–1) was much lower than in natural seawater. This difference was attributed to the significant role played by natural organic matter in complexing dissolved lead. X-Ray diffraction and elemental analysis data suggest that the phase controlling lead solubility is a previously unidentified lead chlorocarbonate, which rapidly transforms to hydrocerussite on washing with deionised water. These observations are of particular relevance to toxicity tests where organisms are exposed to wide ranges of metal concentrations in order to obtain dose–response curves.
Additional keywords: metal solubility, precipitation, speciation.
References
[1] B. K. Schaule, C. C. Patterson, Lead concentrations in the north-east Pacific: evidence for global anthropogenic perturbations. Earth Planet. Sci. Lett. 1981, 54, 97.| Lead concentrations in the north-east Pacific: evidence for global anthropogenic perturbations.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL3MXlt1Sktbs%3D&md5=0e550fbf16b66db1ee745f1dc2eee3beCAS |
[2] F. L. L. Muller, Interactions of copper, lead and cadmium with the dissolved, colloidal and particulate components of estuarine and coastal waters. Mar. Chem. 1996, 52, 245.
| Interactions of copper, lead and cadmium with the dissolved, colloidal and particulate components of estuarine and coastal waters.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK28XjsFOntb8%3D&md5=f7484f59854ce2d0b41003cc5cad5b78CAS |
[3] G. Capodaglio, K. H. Coale, K. W. Bruland, Lead speciation in surface waters of the eastern North Pacific. Mar. Chem. 1990, 29, 221.
| Lead speciation in surface waters of the eastern North Pacific.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK3cXkvVCgtbY%3D&md5=482beb1cfc81b529e699a863836a862eCAS |
[4] M. E. Q. Pilson, An Introduction to the Chemistry of the Sea, 2nd edn 1998 (Cambridge University Press: New York).
[5] W. J. Davis, Contamination of coastal versus open ocean surface waters: a brief meta-analysis. Mar. Pollut. Bull. 1993, 26, 128.
| Contamination of coastal versus open ocean surface waters: a brief meta-analysis.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK3sXksl2mu7c%3D&md5=270de05c845a00bade54d94aa060d15dCAS |
[6] Australian and New Zealand guidelines for fresh and marine water quality 2000 (Australia and New Zealand Environment and Conservation Council (ANZECC); and Agricultural and Resource Management Council of Australia and New Zealand (ARMCANZ): Canberra, ACT).
[7] R. J. Woosley, F. J. Millero, Pitzer model for the speciation of lead chloride and carbonate complexes in natural waters. Mar. Chem. 2013, 149, 1.
| Pitzer model for the speciation of lead chloride and carbonate complexes in natural waters.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXisF2rtrs%3D&md5=deed526574ab98655cc6c1f79aa79949CAS |
[8] D. Marani, G. Macchi, M. Pagano, Lead precipitation in the presence of sulphate and carbonate: testing thermodynamic predictions. Water Res. 1995, 29, 1085.
| Lead precipitation in the presence of sulphate and carbonate: testing thermodynamic predictions.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK2MXktV2itbw%3D&md5=824787dd621cbb095b753f3c333407c1CAS |
[9] J. D. Noel, Y. Wang, D. E. Giammar, Effect of water chemistry on the dissolution rate of the lead corrosion product hydrocerussite. Water Res. 2014, 54, 237.
| Effect of water chemistry on the dissolution rate of the lead corrosion product hydrocerussite.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC2cXkt12mu7o%3D&md5=36745ae1617b177e962b834c7a7add14CAS | 24576699PubMed |
[10] K. B. Krauskopf, Factors controlling the concentration of thirteen trace metals in seawater. Geochim. Cosmochim. Acta 1956, 9, 1.
| Factors controlling the concentration of thirteen trace metals in seawater.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaG28XktlWgsw%3D%3D&md5=0ce8f17002175201166074b918021297CAS |
[11] V. S. Savenko, I. A. Shatalov, Solubility of minerals and forms of lead existence in seawater. Oceanology 2000, 40, 491.
[12] D. R. Kester, I. W. Duedall, D. N. Connors, R. M. Pytkowicz, Preparation of artificial seawater. Limnol. Oceanogr. 1967, 12, 176.
| Preparation of artificial seawater.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaF2sXhtFylur0%3D&md5=a36a7ec97053b17c4a61856b69e2f00cCAS |
[13] J. P. Gustafsson, Visual Minteq ver. 3.1. Available at http://vminteq.lwr.kth.se [Verified 14 May 2015].
[14] A. Stockdale, E. Tipping, J. Hamilton-Taylor, S. Lofts, Trace metals in the open oceans: speciation modelling based on humic-type ligands. Environ. Chem. 2011, 8, 304.
| Trace metals in the open oceans: speciation modelling based on humic-type ligands.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXptVWrsbc%3D&md5=79d2c4570666578baa92db699bb728f0CAS |
[15] B. M. Angel, S. C. Apte, G. E. Batley, L. A. Golding, Geochemical controls on aluminium concentrations in coastal waters. Environ. Chem. 2015, [Published online 15 September 2015]
| Geochemical controls on aluminium concentrations in coastal waters.Crossref | GoogleScholarGoogle Scholar |
[16] P. B. Kozelka, S. Sanudo-Wilhelmy, A. R. Flegal, K. W. Bruland, Physicochemical speciation of lead in south San Francisco Bay. Estuar. Coast. Shelf Sci. 1997, 44, 649.
| Physicochemical speciation of lead in south San Francisco Bay.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK2sXkslaiu7o%3D&md5=5057db745b11b6619355e4df9155e98eCAS |
[17] M. L. Wells, P. B. Kozelka, K. W. Bruland, The complexation of ‘dissolved’ Cu, Zn, Cd and Pb by soluble and colloidal organic matter in Narragansett Bay, RI. Mar. Chem. 1998, 62, 203.
| The complexation of ‘dissolved’ Cu, Zn, Cd and Pb by soluble and colloidal organic matter in Narragansett Bay, RI.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1cXlt1ajs7Y%3D&md5=033bc32070d18bb90400af3a78f4d201CAS |
[18] Y. Louis, C. Garnier, V. Lenoble, D. Omanovic, S. Mounier, I. Pizeta, Characterisation and modelling of marine dissolved organic matter interactions with major and trace cations. Mar. Environ. Res. 2009, 67, 100.
| Characterisation and modelling of marine dissolved organic matter interactions with major and trace cations.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXhtlOks7Y%3D&md5=e8f0d8fc3dfa897e09d064c2356b7ad7CAS | 19135243PubMed |
[19] W. H. Tan, L. H. Lim, The tolerance to and uptake of lead in the green mussel, Perna viridis (L.). Aquaculture 1984, 42, 317.
| The tolerance to and uptake of lead in the green mussel, Perna viridis (L.).Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL2MXht1Krs7g%3D&md5=4917a7cbf5e03f629b8c90a1f05ac42aCAS |
[20] D. Taylor, B. G. Maddock, G. Mance, The acute toxicity of nine ‘grey list’ metals (arsenic, boron, chromium, copper, lead, nickel, tin, vanadium and zinc) to two marine fish species: dab (Limanda limanda) and grey mullet (Chelon labrosus). Aquat. Toxicol. 1985, 7, 135.
| The acute toxicity of nine ‘grey list’ metals (arsenic, boron, chromium, copper, lead, nickel, tin, vanadium and zinc) to two marine fish species: dab (Limanda limanda) and grey mullet (Chelon labrosus).Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL28Xhs1arsw%3D%3D&md5=4d01ee8082029566922be19511b5ca06CAS |
[21] P.-C. Liu, J.-C. Chen, Effects of heavy metals on the hatching rates of brine shrimp Artemia salina cysts. J. World Aquacult. Soc. 1987, 18, 78.
| Effects of heavy metals on the hatching rates of brine shrimp Artemia salina cysts.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL2sXlvFantbY%3D&md5=856b22ee5bfb8e2286727dbf4ac967fdCAS |
[22] S. M. Lussier, J. H. Gentile, J. Walker, Acute and chronic effects of heavy metals and cyanide on Mysidopsis bahia (Crustacea: Mysidacea). Aquat. Toxicol. 1985, 7, 25.
| Acute and chronic effects of heavy metals and cyanide on Mysidopsis bahia (Crustacea: Mysidacea).Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL28XhvVOk&md5=906fb60fbfb2f899dd6548370ea19f97CAS |
[23] G. R. W. Denton, C. Burdon-Jones, Environmental effects on toxicity of heavy metals to two species of tropical marine fish from northern Australia. Chem. Ecol. 1986, 2, 233.
| Environmental effects on toxicity of heavy metals to two species of tropical marine fish from northern Australia.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL28XksFGqur4%3D&md5=256435ddfa8d8638b6b284725ab81f80CAS |
[24] K. P. Gowrinathan, V. N. R. Rao, Physiological responses of some planktonic diatoms to heavy metals. Indian J. Microbiol. 1989, 29, 293.
