Please use this identifier to cite or link to this item:
http://hdl.handle.net/1942/2993
Title: | Evaluation of hydroxyapatite as a metal immobilizing soil additive for the remediation of polluted soils. Part 1. Influence of hydroxyapatite on metal exchangeability in soil, plant growth and plant metal accumulation | Authors: | Boisson, J RUTTENS, Ann Mench, M VANGRONSVELD, Jaco |
Issue Date: | 1999 | Publisher: | ELSEVIER SCI LTD | Source: | ENVIRONMENTAL POLLUTION, 104(2). p. 225-233 | Abstract: | In order to evaluate the possible use of hydroxyapatite (HA) as a soil additive for the in situ remediation of metal contaminated soils, the immobilizing capacity of this product was investigated. Three different concentrations of HA (0.5%, 1%, and 5% by weight (w/w)) were applied to a metal (Zn, Pb, Cu, Cd) and As contaminated soil originating from an old zinc smelter site in Belgium. After a three weeks equilibration period, exchangeable metal concentrations of the soils were determined using 0.1 M Ca(NO3)(2) extraction. Test plants (Zea Mays cv. Volga and Phaseolus vulgaris cv. Limburgse vroege) were grown on all soils. Growth parameters were determined and mineral analysis (Cu, Zn, Pb, Cd, Ni, Mn, Mg, Ca, K, As and P) of plants was performed. Exchangeable metal contents in soil decreased with increasing HA application. Plant growth was partly restored on the 0.5% and 1% HA treated soils. However, at the 5% HA application rate growth was inhibited again. Plant mineral analysis showed that concentrations of 'toxic' metals in the leaves of the test plants decreased after HA application. However, the uptake of essential trace elements also decreased and probably led to Mn-deficiency in maize. In bean, addition of 0.5% and 1% HA resulted in a gradual decrease of metal uptake. At the 5% application level an increase of Zn, Cu, and Ni uptake was observed compared to the 0.5% and 1% application rate. In contrast to metal uptake, As uptake was found to increase after HA treatment. The increased PO42- concentration in the soil may be responsible for this. These results illustrate that HA application for the remediation of metal contaminated soils can be effective, but is not self evident. Strong immobilization of essential nutrients may lead to deficiency problems and mobilization of As may lead to an increased transfer to plants and animals and to an increased percolation of this element to the ground water. (C) 1999 Elsevier Science Ltd. All rights reserved. | Notes: | INRA, Bordeaux Aquitaine Res Ctr, Agron Unit, F-33883 Villenave Dornon, France. Limburgs Univ Ctr, B-3590 Diepenbeek, Belgium.Boisson, J, INRA, Bordeaux Aquitaine Res Ctr, Agron Unit, BP 81, F-33883 Villenave Dornon, France. | Keywords: | heavy metals; hydroxyapatite; immobilization; extractability; phytoavailability | Document URI: | http://hdl.handle.net/1942/2993 | DOI: | 10.1016/S0269-7491(98)00184-5 | ISI #: | 000078178500007 | Type: | Journal Contribution | Validations: | ecoom 2000 |
Appears in Collections: | Research publications |
Show full item record
SCOPUSTM
Citations
199
checked on Sep 3, 2020
WEB OF SCIENCETM
Citations
200
checked on Oct 13, 2024
Page view(s)
118
checked on Nov 7, 2023
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.