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- W2377989939 abstract "Lead(Pb)is one of the most common and toxic heavy metals in soil.Phosphorus(P)amendment is found to be the most effective way of immobilizing Pb in soil.However,application of large amount of P is both a waste of P resource and a threat of the environment quality.Honeycomb briquette combustion residue(HBCR)is a kind of solid waste in rural area of China,it is often discarded as a waste.The purpose of this study was to explore the feasibility of immobilizing Pb in a Chaotu soil with low P availability by application of P fertilizer and HBCR.A Chaotu soil with low P availability(Olsen-P=2.50mg·kg-1)was spiked with 0 or 500mg·kg-1 Pb,single superphosphate was applied in Pb-spiked soil at P:Pb=0 or 4,2mm HBCR was applied at the rates of 0% or 2% of the soil(dry weight),ryegrass(Lolium perenne L.)was planted in all treatments.After ryegrass plants were harvested,soil DTPA-Pb,Olsen-P,pH,electrical conductivity(EC)and plant yield were determined.HBCR amendment reduced soil DTPA-Pb contents at both 0 and 500mg·kg-1 Pb rates,average reduction reached 5.61% for all treatments with HBCR application,the effect of HBCR in soil with Pb-spiking and without P amendment was significant at 0.05 level.Soil amended with P and HBCR had the lowest DTPA-Pb contents in all Pb-spiked soils.HBCR application also increased Olsen-P contents(2.71mg·kg-1 on the average)in all treatments.HBCR increased soil pH for 0.1 unit and resulted in higher EC compared with soil without HBCR application,however,only the effect on pH was significant(p0.05).HBCR resulted in lower ryegrass yield in all treatments.An interesting result was that in soil spiked with 500mg·kg-1 Pb and without P application,Olsen-P contents increased significantly compared with soil without Pb-spiking(p0.05),suggesting that in a soil with very low P availability,stress of high Pb availability may result in more root exudates,which enhances P availability in the soil.Thus,HBCR amendment can reduce Pb availability and improve P availability;however,its negative effect on plant growth should be subjected to further research if it is to be used for immobilizing Pb in soil." @default.
- W2377989939 created "2016-06-24" @default.
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- W2377989939 date "2010-01-01" @default.
- W2377989939 modified "2023-09-26" @default.
- W2377989939 title "Remediation of Lead Polluted Chaotu Soil with Low Phosphorus Availability by Application of Honeycomb Briquette Combustion Residue and Phosphorus Fertilizer" @default.
- W2377989939 hasPublicationYear "2010" @default.
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