Structures of Pb-BHA Complexes Adsorbed on Scheelite Surface
Structures of Pb-BHA Complexes Adsorbed on Scheelite Surface
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白钨矿表面吸附的Pb-BHA配合物的结构
DOI：
10.3389/fchem.2019.00645
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发表时间：
2019-09
影响因子：
5.5
通讯作者：
Song Zhenguo
中科院分区：
文献类型：
--
作者：
Wei Zhao;Sun Wenjuan;Hu Yuehua;Han Haisheng;Sun Wei;Wang Ruolin;Zhu Yangge;Li Bicheng;Song Zhenguo
已有研究表明，Pb-BHA络合物（苯异羟肟酸铅络合物）具有较好的捕收能力，可用于BHA作捕收剂、铅离子作活化剂的浮选试验。然而，吸附在矿物表面的Pb-BHA络合物的结构仍不清楚。通过浮选实验和吸附容量测定，研究了Pb-BHA配合物在白钨矿表面的吸附行为，并利用X射线光电子能谱（XPS）和飞行时间二次离子质谱（TOF-SIMS）对Pb-BHA配合物的结构进行了表征。吸附容量结果表明，Pb-BHA浮选时，更多的BHA吸附在白钨矿表面; XPS和TOF-SIMS分析表明，活化浮选和Pb-BHA浮选时，白钨矿表面吸附的Pb-BHA络合物种类相似。因此，白钨矿表面络合物含量的不同是影响其浮选行为的主要原因。XPS和TOF-SIMS分析表明，BHA与铅离子形成了不同结构的配合物，如五元环和四元环结构。结构碎片推断的基础上的测量表明，铅离子形成的单体配合物与两个BHA，并与配合物中的氧原子键合的具有一定聚合度的氢氧化铅聚合物。Pb-BHA配合物联合收割机与白钨矿表面上的氧原子结合形成吸附物，使表面疏水。
Previous studies have shown that Pb-BHA complexes (lead complexes of benzohydroxamic acid) have better collecting ability and can be used in flotation experiments with BHA acting as a collector and lead ions acting as activators. However, the structures of Pb-BHA complexes adsorbed on a mineral surface remain unclear. In this work, the adsorption behavior of Pb-BHA complexes on the scheelite surface was studied by flotation experiments and adsorption capacity measurements, and the structures of the adsorbed Pb-BHA complexes were determined using X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (TOF-SIMS). The adsorption capacity results showed that more BHA was adsorbed on the scheelite surface in Pb-BHA flotation, and the XPS and TOF-SIMS analysis showed that the species of Pb-BHA complexes adsorbed on the scheelite surface were similar in activation flotation and Pb-BHA flotation. Therefore, the different contents of the complexes on the scheelite surface were responsible for the flotation behavior. XPS and TOF-SIMS showed that BHA combined with lead ions to form complexes with different structures, such as five- and four-membered ring structures. Structure fragment inference based on the measurements indicated that lead ions formed monomer complexes with two BHAs, and that lead hydroxide polymers with a certain degree of polymerization bonded with oxygen atoms in the complexes. The Pb-BHA complexes combine with oxygen atoms on the scheelite surface to form an adsorbate, rendering the surface hydrophobic.
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影响因子：
2.8
作者：
Jianyong He;Hai-sheng Han;Chenyang Zhang;Yue-hua Hu;Dandan Yuan;Mengjie Tian;Daixiong Chen;Wei Sun
通讯作者：
Jianyong He;Hai-sheng Han;Chenyang Zhang;Yue-hua Hu;Dandan Yuan;Mengjie Tian;Daixiong Chen;Wei Sun
对苯并异羟肟酸在铅（II）活化锡石表面吸附机制的新见解：综合实验和计算研究
影响因子：
4.8
作者：
Tian Mengjie;Zhang Chenyang;Han Haisheng;Liu Runqing;Gao Zhiyong;Chen Pan;He Jianyong;Hu Yuehua;Sun Wei;Yuan D;an
通讯作者：
an
影响因子：
--
作者：
M. Breza;A. Manová
通讯作者：
M. Breza;A. Manová
影响因子：
--
作者：
M. Breza;A. Manová
通讯作者：
M. Breza;A. Manová
影响因子：
44.1
作者：
Liang, G;Zhang, XD;Koide, SS
通讯作者：
Koide, SS