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to stabilize and recover heavy metals from solid waste, including direct extraction, roasting, crystallization and solidification based on its characteristics [20-23]. LI et al [24] determined the mineralogy characterizations of zinc leaching residue and provided information to develop new technology for separating iron and zinc from zinc leaching residue. MIN et al [25] accessed the environmental......
or microwave-assisted synthesis, direct precipitation and homogeneous precipitation method. For instance, WAN et al [3] have reported the synthesis of randomly oriented ZnCdO nanowires with a low Cd atomic percentage of about 1.5% by evaporating metallic zinc (Zn) and cadmium (Cd) at 900°C. Then, SAMUEL et al [4] claimed that 2% Cd doping in ZnO, synthesized by polyol method, reasonably increases the photo......
under oxygen atmosphere, and constantly weighed. Phase analysis was carried out in an X-ray diffractometer (XRD) (Philips analytical PW 1710) using Cu Kα radiation of 1.5418 at 40 kV and 30... S, BAAMEUR L, RICHARD D, AL DUJAILI A H. Preparation and characterization of an activated carbon from a date stones variety by physical activation with carbon dioxide [J]. Journal of Analytical......
(Rigaku Co. Ltd., Tokyo, Japan), with Cu Kα radiation (1.54178 ) in 2θ range from 5° to 80°. For the XRD analysis, the Ag particles were removed from the electrode surface every 10 min, rinsed... and overpotential for hydrogen discharge than those from the nitrate electrolyte [30]. When the ammonium electrolyte was used, J0 JL is valid, and then, Ag is situated, together with Cu and Au......
be mainly divided into five types: 1) carbon based materials; 2) metal oxides and sulfides; 3) alloy-based materials; 4) titanium- based composites; 5) organic compounds [6]. Graphite, the most...]. Although metal oxides [9, 10] and sulfides [11–13] along with alloy-based materials [14–16] have high capacity, they still face a number of issues such as poor initial Coulombic efficiency and inferior......
studies of the ore-forming processes in the upper crust of the earth have been conducted by ZHAO et al [19-21] and others [22-24]. The previous studies can be briefly classified into the following... polymetallic deposit. Among above-mentioned research achievements, ZHAO et al [46-48] have conducted primitive and pioneering work on reactive fluid-mixing and mineralization in pore......
for estimating the PS. In the 90s of the last century, a special single-hidden layer feed-forward neural network (SLFN), named random vector functional link network (RVFLN), was proposed by PAO et al.... Temperature control for thermal treatment of aluminum alloy in a large-scale vertical quench furnace [J]. Journal of Central South University, 2016, 23(7): 1719–1728. [4] QIAO Jing-hui, CHAI Tian-you......
in the structure. In addition, HUDSON et al [14] considered that the peak strength of a sample is a function of the boundary conditions of the test, and hence is not an inherent material property... of rock [15-17]. At different temperatures, YIN et al [18] carried out the impact experiments of sandstone samples with different axial pressures. The results showed that temperature was a very......
相,使钴保留在萃余液中.控制P204萃余液的成分ρ(Cu)≤0.002 g/L,ρ(Fe)≤0.005 g/L,ρ(Mn)≤ 0.01 g/L,ρ(Zn)≤0.005 g/L;P507萃取工序目的是实现钴与镍的分离,使钴萃取进入P507负载有机相,而镍留在萃余液中,要求萃余液中ρ(Co)≤0.1 g/L,P507负载有机相用硫酸溶液或盐酸溶液反萃,反萃液经过除油后浓缩结晶,分别得到硫酸钴或氯化钴产品. 1.2 P204反萃液产出 从上述钴矿湿法冶金工艺可以看出,P204萃取深度除杂过程是至关重要的.P204(二乙基己基磷酸)是一种广谱的阳离子萃取剂,在酸性介质中萃取金属离子由大到小依次为Fe3+,Zn2+,Cu2+,Mn2+,Co2+,Ni2+,Mg2+,Ca2+,所以,在P204萃取除杂过程中,Fe,Zn,Cu,Mn和部分Co会被P204萃取,后续采用盐酸溶液对P204负载有......
and 4PC can extract Cu(II), Ni(II), and Co(II) from acidic multi-metal sulfate solutions with about pH 2, and the extraction efficiency of copper is higher than that of other metal ions [5]. Moreover... on the phase disengagement rate. In the system of copper solvent extraction, LIU et al [13] found that with the increase of Lix984N content, the phase disengagement rate and the interfacial tension decreased......