Phosphate Fertilizer Enhances Arsenic Uptake by Apricot Liners Grown in Lead-arsenate-enriched Soil

Abstract

<jats:p>Phosphate fertilizer additions to soils containing lead arsenate (LA) pesticide residues can increase As volubility. Apricot <jats:italic>(Prunus armeniaca</jats:italic> L.) rootstock liners were grown in nondraining pots containing Burch loam soil that received a factorial treatment combination: 1) LA enrichment [no added LA (-LA), and LA added at 138 mg Pb/kg and 50 mg As/kg (+LA)]; 2) fertilizer type [monoammonium phosphate (MAP) and its sulfur analog ammonium hydrogen sulfate (AHS)]; and 3) fertilizer anion rate (0-26.1 mol/m<jats:sup>3</jats:sup> soil). Measured response variables were soil salinity and pH, plant biomass, and plant As and Pb concentrations. Both MAP and AHS increased soil electrical conductivity (EC) and decreased soil pH, with AHS usually being more salinizing and acidifying than MAP was at equivalent rates. Adding LA reduced shoot and root mass and increased As and Pb concentration in shoots and roots. Shoot and root mass were inversely related to soil EC in the -LA soil but not in the +LA soil. Adding MAP increased shoot and root As concentration in the +LA soil, but adding AHS had no effect. Fertilizer type and rate did not influence shoot As concentration or root Pb concentration in the -LA soil or shoot Pb concentration in either the +LA or -LA soil. Adding AHS to the +LA soil increased root Pb concentration. These results are consistent with a P-enhanced solid-phase As release mechanism, which consequently increases plant uptake of soil As. Phosphate amendment had no effect on soil Pb phytoavailability.</jats:p>

Resource manipulation in uranium and arsenic attenuation by Lemna gibba L. (duckweed) in tailing water of a former uranium mine

“…Decrease of PO 3− 4 to 0.014 mg l −1 increased arsenic accumulation by L. gibba by six-fold (significant at t-test p ≤ 0.05). The current results agree with finding in other studied where PO 3− 4 reduces the arsenic accumulation in plants, fungi and algae (Aracil et al, 2001;Barrachina et al, 1995;Creger and Peryea, 1994;Meharg and Hartley-Whitaker, 2002). The surface tailing waters in Neuensalz-Mechelgrün had considerably high dissolved oxygen (Table I), thus As V were probably the predominant species.…”

Effect of application of phosphate and organic manure-based fertilizers on arsenic transformation in soil columns

“…The changes in the As concentrations would be connected with replacement of the adsorbed AsO 4 ions by PO 4 ions (e.g. Creger and Pereyra 1994).…”

“…Adsorption of As on soil components can be substantially suppressed by application of phosphate as a consequence of competition for the adsorption sites between phosphate and As(V) (Creger and Pereyra 1994;Davenport and Pereyra 1991;Pereyra 1998). Smith et al (2002) observed a substantial reduction in the adsorption of As(III) in the presence of phosphate ions only for soils with low Fe oxide contents (< 100 mmol/kg).…”

Effect of Superphosphate and Arbuscular Mycorrhizal Fungus Glomus mosseae on Phosphorus and Arsenic Uptake in Lentil (Lens culinaris L.)

“…This observation was attributed to the chemical similarity and addition of phosphates to the soil, possibly replacing the arsenate from the sorption sites (Wauchope and McDowell 1984;Peryea 1991). This action could possibly increase the availability of arsenic to the soil solution (Peryea and Kammereck 1997) and may thus enhance arsenate uptake by plants (Creger andPeryea 1994, Quaghebeur andRengel 2001). At comparable soil arsenic level, addition of phosphate caused higher availability of arsenic and phosphorus in soil and increased uptake by corn plants (Ho Man Leung et al 2010;Woolson et al 1973).…”