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为了获得对三硝基甲苯(TNT)红水中有机物能有效富集的材料并研究其富集机理,通过对层间为碳酸根的MgFe层状双氢氧化物(MgFe-LDH)煅烧制备了镁铁氧化物复合物(MgFeO),而后在TNT红水中重构实现了对TNT红水中有机物的富集。并且MgFeO在以十二烷基苯磺酸钠(SDBS)、十二烷基磺酸钠(SDS)、对甲苯磺酸(PTS)、TNT水溶液为TNT红水模拟水中重构,研究其对有机物的富集机理。结果表明,TNT红水中有机物浓度越高,每克煅烧产物对TNT红水COD去除量越大,在研究范围内最高达到58 mg/g,且有机物疏水程度越高,越易于被富集,有机磺酸盐的长链结构有利于被富集,但此类物质强的表面活性会使重构产物表面形成FeOOH相。
In order to obtain a material that is effective for the enrichment of organics in TNT red water and to study its enrichment mechanism, magnesium (MgFe-LDH) was prepared by calcination of MgFe layered double hydroxides (MgFe-LDH) Iron oxide complex (MgFeO), and then reconstituted in TNT red water to achieve the enrichment of organic matter in TNT red water. And MgFeO was reconstituted with TNBS (sodium dodecyl benzene sulfonate), sodium dodecyl sulfate (SDS), p-toluenesulfonic acid (PTS) Enrichment mechanism. The results showed that the higher TNT concentration in red water, the higher COD removal per gram of calcined product for TNT red water, up to 58 mg / g in the study range, and the higher the degree of hydrophobicity of organic matter, The long chain structure of the sulfonate facilitates the enrichment, but the strong surface activity of such materials causes the surface of the reconstituted product to form a FeOOH phase.