Stabilising metal(loid)s in soil with iron and aluminium-based products: Microbial, biochemical and plant growth impact.
Four iron and aluminium-based products, including red mud (RM), hematite (FeO), an iron-rich water treatment residual (Fe-WTR) and amorphous Al hydroxide (Al-OH), were evaluated for their effectiveness at stabilising As and heavy metals (i.e. Cd, Cu, Pb, Zn) in a circumneutral contaminated soil [As...
| Publicado en: | Journal of Environmental Management Vol. 139; pp. 146 - 154 |
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| Autores principales: | , , , , , |
| Formato: | Artículo |
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Academic Press Inc.
Jun2014
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=95987454&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 95987454 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 03014797 EMJ jtl: Journal of Environmental Management issn: 03014797 maglogo: N pubinfo: dt: Jun2014 vid: 139 pid: 735 pub: Academic Press Inc. artinfo: ui: 95987454 10.1016/j.jenvman.2014.02.024 ppf: 146 ppct: 8 formats: tig: atl: Stabilising metal(loid)s in soil with iron and aluminium-based products: Microbial, biochemical and plant growth impact. aug: au: Garau, Giovanni Silvetti, Margherita Castaldi, Paola Mele, Elena Deiana, Pietrino Deiana, Salvatore affil: Sezione di Scienze e Tecnologie Ambientali e Alimentari (S.T.A.A.), Dipartimento di Agraria, University of Sassari, Viale Italia 39, 07100 Sassari, Italy su: Soil amendments Semimetals -- Environmental aspects Iron & the environment Aluminum compounds Soil microbiology Soil biochemistry Effect of iron on plants Effect of aluminum on plants sug: subj: Other Basic Inorganic Chemical Manufacturing All other basic inorganic chemical manufacturing Iron and Steel Mills and Ferroalloy Manufacturing Metal service centres Soil amendments Semimetals -- Environmental aspects Iron & the environment Aluminum compounds Soil microbiology Soil biochemistry Effect of iron on plants Effect of aluminum on plants keyword: Arsenic-polluted soil Iron and aluminium-based products Plant growth Sequential extraction Soil enzyme activity Soil microbial community Arsenic-polluted soil Iron and aluminium-based products Plant growth Sequential extraction Soil enzyme activity Soil microbial community ab: Four iron and aluminium-based products, including red mud (RM), hematite (FeO), an iron-rich water treatment residual (Fe-WTR) and amorphous Al hydroxide (Al-OH), were evaluated for their effectiveness at stabilising As and heavy metals (i.e. Cd, Cu, Pb, Zn) in a circumneutral contaminated soil [As (2105 mg kg), Cd (18 mg kg), Cu (264 mg kg), Pb (710 mg kg), Zn (522 mg kg)]. Treatment impacts on soil microbial and biochemical features (i.e. microbial biomass-C, microbial counts, 16S rRNA PCR-TTGE of culturable bacteria, dehydrogenase, urease and β-glucosidase activity, Biolog derived parameters-AWCD and richness) as well as bean (Phaseolus vulgaris) and wheat (Triticum vulgare) growth were also assessed. After 6 months equilibration, all the amendments (application rate 3% w/w) but RM reduced labile As while only Al-OH reduced the concentration of water-soluble heavy metals. Despite the highest bioavailability of contaminants, most of the soil microbial and biochemical features monitored (i.e. microbial biomass-C, total bacterial counts, dehydrogenase activity and AWCD) were significantly higher in the RM-soil. Bean germination was completely inhibited in RM-soil while wheat growth was similar to that of the control. The Al-OH treatment was best overall, promoting microbial abundance, diversity and activity while increasing bean and wheat growth and reducing As accumulated in plant shoots. Results suggest that Al-OH is a suitable candidate for field evaluations while the use of RM in the remediation of circumneutral or subalkaline contaminated soils should be reconsidered. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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