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; Life Sciences), 2001, 27(1): 28-32. [15] KRISHNAN K A, SREEJALEKSHMI K G, VARGHESE S, et al. Removal of EDTA from aqueous solutions using activated carbon prepared from rubber wood sawdust: kinetic......
-Ni Zn and Cd coatings [J]. Electrochimica Acta, 2013, 105: 314-323. doi: 10.1016/ j.electacta.2013.05.010. [10] FASHU S, GU C D, ZHANG J L, HUANG M L, WANG X L, TU J P. Effect of EDTA and NH4Cl......
等亲水基团,因此较易溶于水.水溶液中,3,5-二硝基水杨酸能与Al3+形成稳定的水溶性络合阴离子,其反应如式(1)所示: (1) 本研究采用紫外可见分光光度法对3,5-二硝基水杨酸与Al3+,La3+的配位反应进行研究,指导后续吸附除铝研究的进行. 1.3 分析方法 实验采用EDTA容量法检测稀土的浓度... extraction of heavy metal ions[D]. Zhengzhou: Henan Normal University, 2012. [19] REPO E, MALINEN L, KOIVULA R, HARJULA R, SILLANPAA M. Capture of Co(Ⅱ) from its aqueous EDTA-chelate by DTPA-modified silica......
orange was added as an indicator, and the content of Zn was titrated with an EDTA solution. The method for the determination of Fe content is as follows: the sample was dissolved with sulfuric acid......
varies from 1.37 to 1.52, and in factory production, the value is normally set to be 1.40). 2.3 Analysis methods The alumina and silica contents were analyzed by an EDTA titration method and a molybdenum......
EDTA [23], Ca(H2PO4)2 [24], HPMA and PBTCA [25]. YANG et al [12] used lime water to treat the rare earth tailings leached with aluminum sulfate by column leaching. Most of the aluminum sulfate......
公司Nova Nano SEM430型场发射电子扫描电镜(SEM)观察固体样品微观形貌;Au,Pt和Pd参照GB/T 7739.1-2007采用火试金-ICP分析检测;采用EDTA滴定法测定Bi含量. 1.4 实验原理 由实验原料铂钯精矿富集过程可知[10-11],铂钯精矿中Bi,Fe分别呈Bi(Ⅲ),Fe(Ⅲ)且以氧化物或无机盐的形式存在,各种物相均易与HCl反应形成氯配合物,其反应......
by BaCl2 addition treatment and titrated by means of ethylenediaminetetraacetate (EDTA) solution [19]. 2.3.3 Micromorphology analysis of residue aggregates The surface morphology and size of aggregate......
调节溶液初始Zn2+浓度. 1.3 分析检测与计算 采用原子吸收光谱仪(AAS)测定溶液中Mg2+的浓度.以二甲苯橙为指示剂,用EDTA滴定法测定溶液中Zn2+的浓度.采用特征X射线衍射(Cu Kα辐射,λ=0.1541838 nm,石墨单色器过滤器)检测分析结晶物的结晶形态及物相组成.利用扫描电子显微镜(SEM)分析主要元素(Mg,Zn,S,O)的分布,利用激光衍射粒度分析仪测定粒度......
常使用自由基和空穴的清除剂来确定压电催化降解过程中主要的活性种.通常选择叔丁醇(TBA)作为羟基自由基清除剂[40],乙二胺四乙酸二钠(EDTA)作为空穴清除剂[41],苯醌(BQ)作为其他超氧化自由基的清除剂[42].WANG等[43]利用NaNbO3纳米线降解RhB,研究发现在没有其他清除剂的情况下,RhB的降解率约为80%.加入叔丁醇(TBA)后,RhB的降解率显著降低,说明羟基自由基在压电催化过程中起着非常重要的作用.加入苯醌(BQ)后RhB的降解率降低,表明超氧化物自由基也是压电催化降解过程中的主要活性物质.加入乙二胺四乙酸二钠(EDTA),染料的降解率略有降低,这表明空穴不是压电催化染料降解的关键活性物质. 图3 MO压电催化紫外可见光谱和降解照片和Ba0.8Sr0.2TiO3 NWs在超声振动下降解MO的循环能力[39] Fig. 3 UV-vis......