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钙、钪、茜素红共显色效应的研究 被引量:8
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作者 孙明星 张进才 《分析化学》 SCIE EI CAS CSCD 北大核心 1991年第1期70-72,共3页
本文研究了Sc,Ca,ARS体系共显色效应。通过实验表明,此共显色效应是由于形成聚合型异多核配合物所致,并且对一定范围钪量成线性关系。用此法可进行微量钪的测定。最后还探讨了该聚合型异多核配合物形成的机理。
关键词 测定 茜色红 共显效应
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The adsorptive properties of UiO-66 towards organic dyes: A record adsorption capacity for the anionic dye Alizarin Red S. 被引量:10
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作者 Marwa S.Embaby Saber D.Elwany +1 位作者 Widiastuti Setyaningsih Mohamed R.Saber 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第4期731-739,共9页
In order to decisively determine the adsorption selectivity of zirconium MOF(UiO-66) towards anionic versus cationic species, the adsorptive removal of the anionic dyes(Alizarin Red S.(ARS), Eosin(E), Fuchsin Acid(FA)... In order to decisively determine the adsorption selectivity of zirconium MOF(UiO-66) towards anionic versus cationic species, the adsorptive removal of the anionic dyes(Alizarin Red S.(ARS), Eosin(E), Fuchsin Acid(FA)and Methyl Orange(MO)) and the cationic dyes(Neutral Red(NR), Fuchsin Basic(FB), Methylene Blue(MB),and Safranine T(ST)) has been evaluated. The results clearly reveal a significant selectivity towards anionic dyes. Such an observation agrees with a plethora of reports of UiO-66 superior affinity towards other anionic species(Floride, PO_4^(3-), Diclofenac sodium, Methylchlorophenoxy-propionic acid, Phenols, CrO_4^(2-), SeO_3^(2-), and AsO_4^-). The adsorption process of ARS as an example has been optimized using the central composite design(CCD). The resultant statistical model indicates a crucial effect of both pH and sorbent mass. The optimum conditions were determined to be initial dye concentration 11.82 mg.L^(-1), adsorbent amount 0.0248 g, shaking time of 36 min and pH 2. The adsorption process proceeds via pseudo-second order kinetics(R^2= 0.999). The equilibrium data were fit to Langmuir and Tempkin models(R^2= 0.999 and 0.997 respectively). The results reveal an exceptional removal for the anionic dye(Alizarin Red S.) with a record adsorption capacity of400 mg·g^(-1). The significantly high adsorption capacity of UiO-66 towards ARS adds further evidence to the recently reported exceptional performance of MOFs in pollutants removal from water. 展开更多
关键词 Adsorption Metal-organic frameworks Alizarin Red S. Dye removal UiO-66 Central composite design
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