PMID: 11918028Mar 29, 2002Paper

Physicochemical aspects of lead bioaccumulation by Chlorella vulgaris

Environmental Science & Technology
Vera I Slaveykova, Kevin J Wilkinson

Abstract

The relationship between lead speciation and its bioaccumulation by the alga Chlorella vulgaris was studied in the absence and presence of nitrilotriacetic, iminodiacetic, malonic, and citric acids. Pb uptake fluxes were rigorously analyzed by considering the simultaneous effects of metal transport in the medium coupled with metal complex dissociation kinetics. Under the conditions examined here, lead biouptake by C. vulgaris was governed by the free lead ion activity. Potentially labile hydrophilic complexes such as lead citrate and lead malonate did not contribute to the internalization fluxes. Kinetic modeling of the mass transport, adsorption reactions, and internalization fluxes confirmed the rate limiting role of the internalization flux. Comparison of the internalization and diffusive fluxes revealed that even in the presence of a large excess of Pb complexes, the supply of free ion (Pb2+) was sufficient to account for the observed Pb uptake. Pb adsorption to the cell surface was described by Langmuir isotherm. A new method was proposed as a means to estimate the number of Pb occupied transport sites at steady state. The apparent stability constant for the interaction of Pb with transport sites was determined to be 10(5....Continue Reading

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Citations

Jan 29, 2013·Environmental Science and Pollution Research International·Martin Mkandawire
Dec 18, 2013·Journal of Plant Physiology·Stefanie VollandUrsula Lütz-Meindl
Jun 23, 2004·The Science of the Total Environment·Vera I SlaveykovaKevin J Wilkinson
Oct 3, 2002·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Peter G C CampbellBernard Vigneault
Jun 5, 2003·International Immunopharmacology·Mary L S QueirozSolange Malacrida
Mar 1, 2011·Environmental Science & Technology·Julian SpieringsVera I Slaveykova
Jan 21, 2014·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Paula Sánchez-MarínPeter G C Campbell
Jan 13, 2016·Inorganic Chemistry·Daniele CortecchiaNripan Mathews
Aug 8, 2008·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Mary L S QueirozChrislaine O Soares
Nov 3, 2011·Environmental Toxicology and Chemistry·Tasha L StoiberDavid E Armstrong
Oct 16, 2013·Environmental Toxicology and Chemistry·Séverine Le FaucheurVera I Slaveykova
Jan 23, 2015·Environmental Science & Technology·Chun-Mei Zhao, Kevin J Wilkinson
May 3, 2011·Environmental Pollution·Isidoro Rubio-Franchini, Roberto Rico-Martínez
Dec 22, 2005·Environmental Pollution·G R MacFarlaneR A Russell
Aug 9, 2011·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Mary L S QueirozAndrana K Calgarotto
Jul 5, 2005·Aquatic Toxicology·Christel S HasslerKevin J Wilkinson
Mar 12, 2003·Environmental Toxicology and Chemistry·Christel S Hassler, Kevin J Wilkinson
Jul 23, 2020·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Ping LuoXin Xiao
Oct 25, 2008·Journal of Environmental Quality·Erwin J J KalisWillem H van Riemsdijk
Apr 30, 2008·Environmental Science & Technology·Thomas A DavisHerman P van Leeuwen
May 25, 2010·Environmental Science & Technology·Rita HajduVera I Slaveykova
May 8, 2010·Environmental Science & Technology·Pascal L R van der VeekenHerman P van Leeuwen

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