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- W2351036163 abstract "The present paper intends to evaluate the effects of nano-particle hydroxyapatite( n-HAP) on the bioavailability of Pb in the farmland soils near the e-waste dismantling site. For this purpose,we have laid out experiments at different mass ratios( e. g. 0,5 g/kg,10 g/kg,15 g/kg,20 and 25 g/kg) of n-HAP and two kinds of plants( rape and cabbage) for testing the effects of n-HAP on the biomass of rape and cabbage,the form of Pb and the accumulation of Pb in the rape and cabbage. Results have shown that the biomass of rape and cabbage increases,the residual form of Pb increases and exchanged form of Pb decreases by nHAP with 5 g / kg,10 g / kg,15 g / kg,20 g / kg and 25 g / kg with the biomass in the order of rape cabbage. The exchanged form of Pb tends to drop significantly( p 0. 05) and the bound to the carbonate form of Pb turns out to drop by 66. 67%- 91. 67% and20. 02%- 73. 34% in the rape and cabbage planted soil,respectively( p 0. 01). What is more,the bound to iron and manganese oxides form of Pb is expected to be reduced by 18. 01%-50. 00% and 19. 07%- 49. 92% in the rape and cabbage planted soil,respectively. In addition,the bound to organic matter form of Pb is likely to decrease whereas the residual form of Pb tends to rise by 17%- 167. 0% and 10. 0%- 250. 0% in the cabbage and rape planted soil,respectively. As to the accumulation of Pb in the rape and cabbage by different concentrations of n-HAP,the accumulation order should be taken as that of rape cabbage. The bioavailability values of Pb in the soils planting rape and cabbage turn to drop by 25. 53%- 82. 77% and45. 79%- 71. 68%,respectively because of the significant decrease of the content of availability form of Pb. When the mass ratio of n- HAP is 20 g / kg,the biomass of the rape and cabbage is higher,the accumulation of Pb in the rape and cabbage is lower,and the maximum reduction of the bioavailability values of Pb are 81. 84% and 70. 89% in the rape and cabbage planted soil,respectively. Thus,a conclusion can be drawn that the optimized dosage of n- HAP should be 20 g / kg whereas the rape should be a potential desirable passivator in the farmland near the e-waste dismantling site." @default.
- W2351036163 created "2016-06-24" @default.
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- W2351036163 date "2015-01-01" @default.
- W2351036163 modified "2023-09-28" @default.
- W2351036163 title "Effect of nano-particle hydroxyapatite on the bioavailability of Pb in the farmland soils around the e-waste dismantling site" @default.
- W2351036163 hasPublicationYear "2015" @default.
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