Chemical properties of rare earth elements in typical medical waste incinerator ashes in China.
Chemical properties of rare earth elements in typical medical waste incinerator ashes in China.
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我国典型医疗垃圾焚烧炉灰烬中稀土元素的化学性质
DOI：
10.1016/j.jhazmat.2008.01.091
复制
发表时间：
2008-10-30
影响因子：
13.6
通讯作者：
Zhang J
中科院分区：
文献类型：
--
作者：
Zhao L;Zhang FS;Zhang J
研究了不同类型医疗废物焚烧炉灰渣中稀土元素的特征及其对环境的影响。结果表明，火山灰样品中稀土元素总量为10.2 ~ 78.9mg/kg。底灰中的稀土元素含量明显高于粉煤灰。火山灰中稀土元素平均含量为Ce > La > Nd > Y > Gd > Pr > Sm > Dy > Er > Yb > Ho > Eu > Tb > Lu > Tm。火山灰样品中Sm、Dy、Ho、Er、Yb等元素呈正态分布或接近正态分布，而Y、La、Ce、Pr、Nd、Eu、Gd、Tb、Tm、Lu等元素呈非正态分布，表明部分火山灰样品中富集了这些元素。稀土元素配分模式表明，两种火山灰均明显富集Gd和La。连续提取结果表明，火山灰中稀土元素主要以残渣态存在，交换态和碳酸盐态含量相对较低。DTPA-和EDTA-萃取试验表明，稀土在微波灰烬中普遍处于低生物有效性。
Medical waste (MW) ashes from different types of MW incinerators were examined to detect the characteristics and environmental impact of rare earth elements (REEs). The results showed that total REE contents in the ash samples ranged from 10.2 to 78.9 mg/kg. REEs in bottom ash were apparently higher than those in fly ash. Average REE contents in the ashes followed the sequence of Ce > La > Nd > Y > Gd > Pr > Sm > Dy > Er > Yb > Ho > Eu > Tb > Lu > Tm. Some of the elements, such as Sm, Dy, Ho, Er, Yb in the ash samples were in normal or nearly normal distribution, but Y, La, Ce, Pr, Nd, Eu, Gd, Tb, Tm, Lu were not normally distributed, indicating some of the ash samples were enriched with these elements. Crust-normalized REE patterns indicated that two types of the MW ashes were obviously enriched with Gd and La. Sequential extraction results showed that REEs in the ash mainly presented as residual fraction, while exchangeable and carbonate fractions were relatively low. DTPA- and EDTA-extraction tests indicated that REEs in the MW ashes were generally in low bioavailability.
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DOI：
10.1080/03067319308027621
发表时间：
1993-01-01
影响因子：
2.6
作者：
LEGRET, M
通讯作者：
LEGRET, M
DOI：
10.2136/sssaj1968.03615995003200040035x
发表时间：
1968-01-01
期刊：
SOIL SCIENCE SOCIETY OF AMERICA PROCEEDINGS
影响因子：
--
作者：
WEAR, JI;EVANS, CE
通讯作者：
EVANS, CE
影响因子：
2
作者：
Kawasaki, A;Kimura, R;Arai, S
通讯作者：
Arai, S
影响因子：
13.6
作者：
Lo, Huang-Mu;Liao, Yuan-Lung
通讯作者：
Liao, Yuan-Lung
影响因子：
8.8
作者：
Barry, MJ;Meehan, BJ
通讯作者：
Meehan, BJ