期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
Deep removal of copper from nickel electrolyte using manganese sulfide
1
作者 李江涛 陈爱良 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第11期3802-3807,共6页
Copper is difficult to separate from nickel electrolyte due to low concentration of copper (0.53 g/L) with high concentration of nickel (75 g/L). Manganese sulfide (MnS) was used to deeply remove copper from the elect... Copper is difficult to separate from nickel electrolyte due to low concentration of copper (0.53 g/L) with high concentration of nickel (75 g/L). Manganese sulfide (MnS) was used to deeply remove copper from the electrolyte. Experimental results show that the concentration of copper (ρ(Cu)) decreases from 530 to 3 mg/L and the mass ratio of copper to nickel (RCu/Ni) in the residue reaches above 15 when the MnS dosage is 1.4 times the theoretical valueDt,MnS (Dt,MnS=0.74 g) and the pH value of electrolyte is 4?5 with reaction time more than 60 min at temperatures above 60 °C. The concentration of newly generated Mn2+(ρ(Mn)) in the solution is also reduced to 3 mg/L by the oxidation reaction. The values ofρ(Cu),ρ(Mn)andRCu/Ni meet the requirements of copper removal from the electrolyte. It is shown that MnS can be considered a highly effective decoppering reagent. 展开更多
关键词 MNS decoppering reagent copper removal manganese removal nickel anodic electrolyte
下载PDF
Manganese removal from the Qiantang River source water by pre-oxidation:A case study
2
作者 Jian-wen ZHU Zhen ZHANG +2 位作者 Xiao-min LI Xin-hua XU Da-hui WANG 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2009年第3期450-457,共8页
We evaluated several different pre-oxidation treatments, namely the introduction of either potassium permanganate (KMnO4), chlorine (Cl2), or both to remove manganese (Mn) from the Qiantang River source water. Our res... We evaluated several different pre-oxidation treatments, namely the introduction of either potassium permanganate (KMnO4), chlorine (Cl2), or both to remove manganese (Mn) from the Qiantang River source water. Our results showed that Mn removal percentages were 12.7%, 71.0%, 17.4% and 58.7% when none of the oxidants, KMnO4 only, Cl2 only, or both oxidants were added, respectively. Furthermore, a field study showed that when the available Mn concentration in the source water was 0.14 mg/L, it could be reduced to less than 0.05 mg/L when a solution of KMnO4 (0.47 mg/L) was added as the oxidant. 展开更多
关键词 PRE-OXIDATION Potassium permanganate (KMnO2) Chlorine (Cl2) manganese (Mn) removal
原文传递
Removing Iron and Manganese Simultaneously from Ground Water Using One-stage Biological Filter
3
作者 薛罡 高品 龚清杰 《Journal of Donghua University(English Edition)》 EI CAS 2009年第3期247-251,共5页
A novel process for removing iron and manganese simultaneously in ground water,which consisted of simple aeration and one-stage filtration,was developed in this research. It was found that the biological process had m... A novel process for removing iron and manganese simultaneously in ground water,which consisted of simple aeration and one-stage filtration,was developed in this research. It was found that the biological process had much higher manganese removal efficiency than chemical contact oxidation process. At the same time,the optimal operation parameters of aeration and biological filtration such as DO concentration and pH after aeration,filtration rate before and after startup,filtration operation cycle and backwashing rate,etc.,were also obtained by experiments. By analyzing water quality in different positions of filter bed,it was found that the oxidation of Fe2+ in biological filter bed adapted to first-order reaction,whereas the oxidation of Mn2+ conformed to zero-order reaction,which could be explained by Michaelis-Menten enzyme reaction equation when substrate concentration was far more than bacteria amount. 展开更多
关键词 ground zoater biological filter iron removal manganese removal operational parameter KINETICS
下载PDF
Immobilization biological activated carbon used in advanced drinking water treatment 被引量:2
4
作者 马放 杨海燕 王弘宇 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2006年第6期678-682,共5页
Bacteria separated from a mature filter bed of groundwater treatment plants were incubated in a culture media containing iron and manganese. A consortium of 5 strains of bacteria removing iron and manganese were obtai... Bacteria separated from a mature filter bed of groundwater treatment plants were incubated in a culture media containing iron and manganese. A consortium of 5 strains of bacteria removing iron and manganese were obtained by repeated enrichment culturing. It was shown from the experiments of effect factors that ironmanganese removal bacteria in the euhure media containing both Fe and Mn grew better than in that containing only Fe, however, they were unable to grow in the culture media containing only Mn. When comparing the bacteria biomass in the case ofp (DO) :2.8 mg/L andp (DO) :9. 0 mg/L, no significant difference was found. The engineering bacteria removing the organic and the bacteria removing iron and manganese were simuhaneously inoculated into activated carbon reactor to treat the effluent of distribution network. The experimental results showed that by using IBAC ( Immobilization Biological Activated Carbon) treatment, the removal efficiency of iron, manganese and permanganate index was more than 98% , 96% and 55% , respectively. After the influent with turbidity of 1.5 NTU, color of 25 degree and oflbnsive odor was treated, the turbidity and color of effluence were less than 0.5 NTU and 15 degree, respectively, and it was odorless. It is determined that the cooperation function of engineering bacteria and activated carbon achieved advanced drinking water treatment. 展开更多
关键词 advanced drinking water treatment miero-pollutaats IBAC: iron and manganese removal engi- neering bacteria
下载PDF
Structural characteristic and ammonium and manganese catalytic activity of two types of filter media in groundwater treatment 被引量:9
5
作者 Ya Cheng Tinglin Huang +3 位作者 Lijie Cheng Yuankui Sun Laisheng Zhu Ye Li 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2018年第10期89-97,共9页
Two types of filter media in groundwater treatment were conducted for a comparative study of surface structure and catalytic performance. Natural filter media was adopted from a conventional aeration–filtration groun... Two types of filter media in groundwater treatment were conducted for a comparative study of surface structure and catalytic performance. Natural filter media was adopted from a conventional aeration–filtration groundwater treatment plant, and active filter media as a novel and promising filter media was also adopted. The physicochemical properties of these two kinds of filter media were characterized using numerous analytical techniques,such as X-Ray diffraction(XRD), scanning electron microscope(SEM), energy dispersive X-ray(EDX), X-ray photoelectron spectroscopy(XPS) and Zeta potential. The catalytic activities of these filter media were evaluated for ammonium and manganese oxidation.XRD data showed that both active filter media and natural filter media belonged to birnessite family. A new manganese dioxide(Mn O2) phase(PDF#72-1982) was found in the structure of natural filter media. The SEM micrograph of natural filter media showed honeycomb structures and the active filter media presented plate structures and consisted of stacked particle. These natural filter media presented lower level of some trace elements such as calcium and magnesium, lower degree of crystallinity, lower Mn(III) content and lattice oxygen content than that of active filter media, which were associated with its poor ammonium and manganese catalytic activities. In addition, some γ-Fe2 O3 and Mn CO3 were found in the coating which may hinder the ammonium and manganese catalytic oxidation. This study provides a thorough and comprehensive understanding about the most commonly used filter media in water treatment, which can provide a theoretical guide to practical applications. 展开更多
关键词 Natural filter media Active filter media manganese and ammonium removal manganese oxides Characterization ACTIVITY
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部