Effects of several harmful anions on the removal of aqueous phosphate by boehmite
Effects of several harmful anions on the removal of aqueous phosphate by boehmite
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DOI：
10.2109/jcersj2.116.984
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发表时间：
2008-09
影响因子：
1.1
通讯作者：
S. Sugiyama;Yu Inaba;T. Manabe;Keizo Nakagawa;K. Sotowa
中科院分区：
文献类型：
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作者：
S. Sugiyama;Yu Inaba;T. Manabe;Keizo Nakagawa;K. Sotowa
用薄水铝石（Al(OH)O）在298 K下去除含有碳酸盐、硫酸盐、硝酸盐、亚硝酸盐、氯化物和氟化物等有害阴离子的磷酸盐水溶液。虽然研究表明薄水铝石能在一定程度上同时去除磷酸盐和氟化物，但没有观察到碳酸盐、硫酸盐、硝酸盐、亚硝酸盐和氯化物的存在对薄水铝石去除磷酸盐的影响。在本研究中，采用两种薄水铝石，一种是市售形式，另一种是用溶胶-凝胶技术制备的薄水铝石，同时去除磷酸盐和氟化物，发现后一种形式的去除效果更好。固态31pmas核磁共振分析表明，在氟化物存在的情况下，磷酸盐作为不同类型的磷酸盐被去除到薄水铝石上，这取决于溶液的pH值和薄水铝石的来源。
Boehmite (Al(OH)O) was employed for the removal of aqueous phosphate in the presence of harmful anions such as carbonate, sulphate, nitrate, nitrite, chloride and fluoride at 298 K. Although boehmite was shown to remove a certain simultaneous removal of phosphate together with fluoride, no influence of the presence of carbonate, sulphate, nitrate, nitrite and chloride on the removal of phosphate by boehmite was observed. In the present study, two kinds of boehmite, a commercially available form and boehmite prepared using a sol-gel technique, were employed for the simultaneous removal of phosphate and fluoride, and it was found that the latter form was superior for such removal. Solid-state 31 P MAS NMR analyses revealed that, in the presence of fluoride, phosphate was removed onto boehmite as different types of phosphate species, depending on the solution pH and the source of boehmite.