【摘 要】
：
In order to improve the yield and stability of ferrate in solution, dissolved Fe (VI) prepared with NaOH and KOH respectively was compared in this study. The re
【机 构】
：
School of Municipal and Environmental Engineering,College of Civil Engineering
论文部分内容阅读
In order to improve the yield and stability of ferrate in solution, dissolved Fe (VI) prepared with NaOH and KOH respectively was compared in this study. The results showed that KOH is more suitable than NaOH for the preparation of dissolved Fe(VI) at temperature over 50 ℃. It is found that the dissolved Fe(VI)prepared with KOH increases quickly at first, and then slowly with the increasing concentrations of OH- and ClO~- , while it increases rapidly at first and then decreases rapidly with the increasing dosage of Fe(NO_3)_3·9H_2O. These results are different from that prepared with NaOH. It can be explained that solid K_2 FeO_4 salts can be formed in KOH solution, and it will lower the Fe (VI) concentration, counteract the decomposition of Fe(VI), and improve the yield of Fe(VI). The maximum ferrate concentration is 0. 163 mol/L obtained by 100 g/L Fe(NO_3)_3· 9H_2O and 6. 16 moL/L KOH at 65℃. The stability of Fe(VI) is greatly improved due to the hypochlorite existed in the dissolved ferrate, and only 24% Fe(VI) has been decomposed after 16 d for 1 mmol/L Fe(VI) at 25 ℃.
其他文献
目的：探讨氟伐他汀对慢性移植物抗宿主病（ cGVHD）狼疮性肾炎模型小鼠肾组织中p38丝裂原活化蛋白激酶（p38MAPK）表达的干预作用。方法将（C57BL/6J ×DBA/2）F1杂交小鼠随机分为模型组、
危险废弃物是一种会对人类健康或环境造成重大危害的废物,随着我国经济的发展和人民生活水平的不断提高,其数量和种类正在日益增加。在我国城市化进程快速发展过程中,对基础设施用地的考虑和预留严重不足,与此同时,部分城市的土地资源日益成为约束其发展的重要因素,因此危险废弃物处理处置用地更是难以保障。以《深圳市危险废弃物处理及处置专项规划》为例,介绍了危险废弃物处理处置设施的选址原则、方法和程序,并提出了相关
目的：探讨非糜烂性胃食管反流病（ NERD ）和反流性食管炎（ RE ）的食管动力特点。方法采用单盲、回顾性分析2008年1月至2011年12月因反流症状接受食管动力检查的患者资料，根据消化内
利用质量控制图监督生产过程时,通常每隔固定时间从过程中抽取固定容量的样本,具有动态特性的控制图比传统静态图能更快地发现过程变化.假定过程均值的飘移服从某种连续概率
The two-stage and two-phase anaerobic process (TSTP) composed of hydrolytic acidification reactor,first-order and second-order external circulation anaerobic re
以深圳大鹏南澳街道消防规划为例,通过对传统消防规划的反思,对新的编制背景下都市型生态旅游地区的消防规划编制进行了一些探索。
Epoxy resin laminate onto which a pair of copper foil was printed was employed as test samples. The samples were placed in an artificial atmospheric chamber, wh
In order to investigate the influence factors of zero excess activated sludge (EAS) process by ozona tion, a 100 L membrane bioreactor coupled with a sludge ozo
Interdecadal and interannual variations of saline-alkali land area in Qianan County, Jilin Province, China were comprehensively analyzed in this paper by means
This study sought to contribute to an improved understanding of soil erosion and redistribution on Mediterranean agricultural land,where traditional soil conser