Adsorption of Cu(II), Zn(II), Ni(II), Cd(II) and Pb(II) on Rice-Straw Biochars
碩士 === 國立中興大學 === 土壤環境科學系所 === 100 === Burning crop residues, such as rice straw, is a common post-harvest practice on farmland, leading to the accumulation of biochars in the soil. To understand the role of biochar in determining the mobility and bioavailability of heavy metals in soil, this study...
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ndltd-TW-100NCHU50200502015-10-13T21:55:42Z http://ndltd.ncl.edu.tw/handle/70034460345037837708 Adsorption of Cu(II), Zn(II), Ni(II), Cd(II) and Pb(II) on Rice-Straw Biochars 稻稈生質炭對重金屬銅、鋅、鎳、鎘、鉛吸附反應之探討 I-Hui Liao 廖怡慧 碩士 國立中興大學 土壤環境科學系所 100 Burning crop residues, such as rice straw, is a common post-harvest practice on farmland, leading to the accumulation of biochars in the soil. To understand the role of biochar in determining the mobility and bioavailability of heavy metals in soil, this study investigated the adsorptions of Cu(II), Zn(II), Ni(II), Cd(II) and Pb(II) ions by two biochars derived from rice straw. Batch adsorption experiments were performed as a function of pH, contact time, initial concentration and ionic strength. The results showed that the adsorptions of metal ions on the biochars were strongly dependent on pH and ionic strength. The biochars exhibited affinity toward the metal ions in the order of : Pb(II)>Cu(II)>Cd(II)≅Zn(II)≅Ni(II). The adsorption isotherms of these metal ions were all fitted well to the Langmuir isotherm. Desorption hysteresis was observed for Cu(II) and Pb(II), indicating that their adsorptions were not reversible. 王尚禮 2012 學位論文 ; thesis 102 zh-TW |
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碩士 === 國立中興大學 === 土壤環境科學系所 === 100 === Burning crop residues, such as rice straw, is a common post-harvest practice on farmland, leading to the accumulation of biochars in the soil. To understand the role of biochar in determining the mobility and bioavailability of heavy metals in soil, this study investigated the adsorptions of Cu(II), Zn(II), Ni(II), Cd(II) and Pb(II) ions by two biochars derived from rice straw. Batch adsorption experiments were performed as a function of pH, contact time, initial concentration and ionic strength. The results showed that the adsorptions of metal ions on the biochars were strongly dependent on pH and ionic strength. The biochars exhibited affinity toward the metal ions in the order of : Pb(II)>Cu(II)>Cd(II)≅Zn(II)≅Ni(II). The adsorption isotherms of these metal ions were all fitted well to the Langmuir isotherm. Desorption hysteresis was observed for Cu(II) and Pb(II), indicating that their adsorptions were not reversible.
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author2 |
王尚禮 |
author_facet |
王尚禮 I-Hui Liao 廖怡慧 |
author |
I-Hui Liao 廖怡慧 |
spellingShingle |
I-Hui Liao 廖怡慧 Adsorption of Cu(II), Zn(II), Ni(II), Cd(II) and Pb(II) on Rice-Straw Biochars |
author_sort |
I-Hui Liao |
title |
Adsorption of Cu(II), Zn(II), Ni(II), Cd(II) and Pb(II) on Rice-Straw Biochars |
title_short |
Adsorption of Cu(II), Zn(II), Ni(II), Cd(II) and Pb(II) on Rice-Straw Biochars |
title_full |
Adsorption of Cu(II), Zn(II), Ni(II), Cd(II) and Pb(II) on Rice-Straw Biochars |
title_fullStr |
Adsorption of Cu(II), Zn(II), Ni(II), Cd(II) and Pb(II) on Rice-Straw Biochars |
title_full_unstemmed |
Adsorption of Cu(II), Zn(II), Ni(II), Cd(II) and Pb(II) on Rice-Straw Biochars |
title_sort |
adsorption of cu(ii), zn(ii), ni(ii), cd(ii) and pb(ii) on rice-straw biochars |
publishDate |
2012 |
url |
http://ndltd.ncl.edu.tw/handle/70034460345037837708 |
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