Recovery of the Phosphorus from the Nitric Acid Extract of Powder Collected in a Bag Filter during the Recycling of Used Fluorescence Tubes
Recovery of the Phosphorus from the Nitric Acid Extract of Powder Collected in a Bag Filter during the Recycling of Used Fluorescence Tubes
复制标题
废旧荧光管回收过程中袋式过滤器收集粉末的硝酸提取物中磷的回收
DOI：
10.1252/jcej.14we171
复制
发表时间：
2015
影响因子：
0.8
通讯作者：
Koh
中科院分区：
文献类型：
--
作者：
S. Sugiyama;Haruka Kinoshita;Ippei Shinomiya;Ryuta Kitora;Keizo Nakagawa;M. Katoh;Koh
在回收使用过的荧光管（袋粉）期间，从袋式过滤器中收集的粉末中回收磷时，采用使用 HNO3 水溶液的间歇方法来检查袋粉中所含磷酸盐水溶液的洗脱行为。袋粉的主要成分包括Ca2+、PO4 3- 和Y3+，以及Si4+、Sr2+ 和镧系元素阳离子，例如La3+ 和Ce4+。因此，通过袋粉中 Ca2+ 和 PO4 3- 的选择性溶解，残渣中的这些镧系阳离子可能会被富集。采用间歇法时，使用1.0 mol/L HNO3 在0.2 min 内溶解袋粉中的大部分磷酸盐。钙阳离子的溶解行为与磷酸盐相似。相比之下，袋粉中镧系阳离子中含量最高的钇的溶解量随着溶解时间的延长而增加，24小时后达到完全溶解。然而，袋装粉末中的Sr2+、La3+和Si4+在相同条件下并不溶解。尽管Ca2+、PO4 3- 和Y3+ 是硝酸提取物中的主要成分，但Y3+ 在pH = 4.0 时以YPO4 形式分离，而Ca2+ 和PO4 3- 在pH = 7.0 时以磷酸钙形式分离。这些结果表明，磷酸钙、YPO4 和一些残留物的分离是可能的，并导致镧系阳离子的富集以及袋粉中磷的回收。使用本技术，袋装粉末中 91% 的磷被回收。
During the recovery of phosphorus from the powder collected in a bag filter during the recycling of used fluorescence tubes (bag-powder), the batch method with aqueous HNO3 was used to examine the elution behavior of aqueous phosphate contained in the bag-powder. The main components of the bag-powder included Ca2+, PO4 3- and Y3+ along with Si4+, Sr2+ and lanthanide cations such as La3+ and Ce4+. Therefore, it seemed possible that, with the selective dissolution of Ca2+ and PO4 3- from the bag-powder, these lanthanide cations in the residue could be enriched. With the batch method, most of the phosphate in the bag-powder was dissolved within 0.2 min using 1.0 mol/L HNO3. The dissolution behavior of calcium cation was similar to that of the phosphate. In contrast, the dissolution of yttrium, the content of which was the highest among the lanthanide cations in the bag-powder, was increased with the dissolution times, reaching complete dissolution after 24 h. The Sr2+, La3+ and Si4+ in the bag-powder, however, did not dissolve under the same conditions. Although Ca2+, PO4 3- and Y3+ were the main components in the nitric acid extract, Y3+ was separated as YPO4 at pH = 4.0, while Ca2+ and PO4 3- were separated as calcium phosphates at pH= 7.0. These results revealed that the separation of calcium phosphates, YPO4 and some residue was possible, and resulted in the enrichment of lanthanide cations along with the recovery of phosphorus from the bag-powder. Using the present technique, 91% of the P in the bag-powder was recovered.
DOI：
--
发表时间：
2010
期刊：
影响因子：
--
作者：
Sugiyama S;et al.
通讯作者：
et al.