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Phytostabilization of a metal contaminated sandy soil. I: Influence of compost and/or inorganic metal immobilizing soil amendments on phytotoxicity and plant availability of metals

Hasselt University, Centre for Environmental Sciences-Environmental Biology, Agoralaan Building D, B-3590 Diepenbeek, Belgium.
Environmental Pollution (Impact Factor: 3.9). 11/2006; 144(2):524-32. DOI: 10.1016/j.envpol.2006.01.038
Source: PubMed

ABSTRACT In a lysimeter set-up, compost addition to an industrial contaminated soil slightly reduced phytotoxicity to bean seedlings. The "Phytotoxicity Index" (on a scale from 1 to 4) decreased from 3.5 to 2.8. The same treatment also reduced metal accumulation in grasses: mean Zn, Cd and Pb concentrations decreased respectively from 623 to 135, from 6.2 to 1.3 and from 10.7 to <6 mg kg-1 dry weight. When combined with inorganic metal immobilizing amendments, compost had a beneficial effect on plant responses additional to the inorganic amendments alone. Best results were obtained when using compost (C)+cyclonic ashes (CA)+steel shots (SS). The "Phytotoxicity Index" decreased to 1.7, highest diversity of spontaneously colonizing plants occurred, and metal accumulation in grasses reduced to values for uncontaminated soils. Based on the first year evaluation, C+CA+SS showed to be an efficient treatment for amendment assisted phytostabilization of the contaminated Overpelt soil.

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    • "dismutase. Vangronsveld and Clijsters (1992), Mench et al. (1994), Vangronsveld et al. (1995a, b, 1996), and Ruttens et al. (2006) reported that, after incorporating soil amendments like compost, cyclonic ashes, and steel shots, the plant-availability of metals decreased and that this resulted in reductions of activities of stress enzymes in roots and leaves of bean seedlings. With increasing biochar application rates an increasing trend of soluble protein content was observed, but differences between the treatments were not significant. "
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    Environmental Science and Pollution Research 08/2014; 22(2):1444-1456. DOI:10.1007/s11356-014-3467-6 · 2.76 Impact Factor
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    • "At a 25 cm depth in all untreated soils, Zn concentrations (Figure 4) were highest during the first and third months. Similar results were reported by Ruttens et al. (2006). In the sludged columns, Zn release to the soil solution was very low compared to untreated columns. "
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    International Journal of Phytoremediation 06/2014; 16(6):593-608. DOI:10.1080/15226514.2013.798625 · 1.47 Impact Factor
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    • "As well as restoring natural cycling of organic matter and nutrients, re-vegetation of contaminated soils is key to onward remediation. The presence of a vegetative cover over bare soil reduces the potential for migration of contaminants to proximal watercourses or inhalation following soil erosion and windblow (Tordoff et al., 2000; Arienzo et al., 2004; Ruttens et al., 2006) but a major limitation to re-vegetation is phyto-toxic concentrations of heavy metals in soils (Pulford and Watson, 2003). Organic soil amendments, such as composts, manures and sludges are now established amongst in-situ alternatives to expensive and/or disruptive hard-engineered removal or capping of contaminated substrates to reduce contaminantassociated risk (Brown et al., 2003; Hartley et al., 2009). "
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