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- W2390475554 abstract "Thermodynamic and dynamic characteristics of Hg~(2+),Cu~(2+),Pb~(2+),Zn~(2+)and Cd~(2+) adsorption to sediments in the Songhua River in the multi-metal system were investigated,and the effect of pH on the adsorption capacity was also analyzed.The results indicated that the Langmuir adsorption isotherm could be used to describe well the adsorption thermodynamics of heavy metals in the multi-metal system.Heavy metal adsorbability to sediments decreased in the order of Hg~(2+)Cu~(2+)Pb~(2+)Zn~(2+)Cd~(2+).Compared with the single metal system,the adsorption capacity of Pb~(2+),Zn~(2+) and Cd~(2+) to sediments decreased 31.9%,32.1% and 68.1% respectively under the same conditions in the multi-metal system,higher than the reductions of Hg~(2+) and Cu~(2+).The Langmuir kinetic equation and first-order kinetic equation could well describe adsorption dynamics of these five heavy metals to sediments.The heavy metals adsorption rate increased in the order of Cd~(2+)Zn~(2+)Pb~(2+)Cu~(2+)Hg~(2+).Cu~(2+),Pb~(2+),Zn~(2+) and Cd~(2+) adsorbability to sediments decreased with pH decrease.The dissolution of Mn~(2+) oxide due to pH decrease could affect the adsorbability of heavy metals to sediments to some extent." @default.
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- W2390475554 date "2010-01-01" @default.
- W2390475554 modified "2023-09-27" @default.
- W2390475554 title "Competitive adsorption of heavy metals on Songhua River sediments and effect of pH." @default.
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