- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
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It is effortless to form harmful floating dust in the air, ... (1000–1250 °C), which experiences evaporation, dust removal, and leaching. Finally, the valuable metals can be recycled from leaching solution ... The adsorption capacity of dust increased with the increase of Fe 2 O 3 /C ratio, ...
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Once the spent adsorbent is exposed to air, the regeneration reaction ... the easier accessing. We cannot expect a total sulfur removal by leaching but have to optimize the leaching time and ammonia flow rate when considering the economics of the process. ... The adsorption–leaching cycle was repeated to determine the cumulative sulfur ...
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A novel process for the treatment of steelmaking converter dust: Selective leaching and recovery of zinc sulfate and synthesis of iron oxides@HTCC photocatalysts by carbonizing carbohydrates ... The pore structure parameters and specific surface area of the catalysts were determined by N 2 adsorption-desorption isotherm using the …
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Leaching of chemical fertilizers and pesticides, applied to agricultural and forest land, is one of the main reasons for organic pollution in several water streams. ... droplets of methyl parathion in the air fall on soil, plants or water. ... At the same time the overall adsorption rate and removal efficiency are reduced in the oxidized carbon ...
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Semantic Scholar extracted view of "Preparation of adsorptive TiO2/SiO2 core-shell nanospheres by ultrasonic-coupled alkali leaching process: Synergy of adsorption and photocatalysis towards 2,4-dinitrophenol removal" by Wen-Jie Tian et al.
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Preparation of adsorptive TiO 2 /SiO 2 core-shell nanospheres by ultrasonic-coupled alkali leaching process: Synergy of adsorption and photocatalysis towards 2,4-dinitrophenol removal. Author links open overlay panel Wen-Jie Tian a 1 ... spent SCR catalysts were sieved to pass through mesh size of 200 after air sweeping to remove …
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Among various methods used for defluoridation of water such as coagulation, precipitation, membrane processes, electrolytic treatment, ion-exchange, the adsorption process is widely used. It offers satisfactory results and seems to be a more attractive method for the removal of fluoride in terms of cost, simplicity of design and operation.
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The reclamation and reuse of electrolytic manganese residue (EMR) as a bulk hazard solid waste are limited by its residual ammonia nitrogen (NH 4 +-N) and manganese (Mn 2+).This work adopts a co-processing strategy comprising air-jet milling (AJM) and horizontal-shaking leaching (HSL) for refining and leaching disposal of NH 4 +-N and …
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The adsorption results show that the maximum uptake capacity of this material for cadmium removal reached to 2.1 mmol/g (initial pH = 4) which shows that this material can effectively remove cadmium ions from effluent and is highly competitive with the commercial resins.
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When bromine/bromide is used as leaching reagent, the dissolution of gold could occur, taking advantage of the excess concentration of bromide ions - Br 3 − is the predominant adsorption species, or the excess concentration of bromine. Besides the bromine-bromide ratio, the gold dissolution rate is influenced by which minerals are …
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The fibers obtained using APTMS as the surface modifier displayed the fastest adsorption for CR, and a removal percentage of 86.3% after 5 min; non-surface-modified SA fibers exhibited the fastest adsorption for , and a removal percentage of 98.2% in 5 min.
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Pseudo-second-order model and Langmuir isotherm were found to be most fitted to adsorption kinetics and removal isotherms . The effectiveness of removing copper ions Cu(II) and zinc ions Zn (II) heavy metals from groundwater using cement kiln dust and a sand PRB was investigated by . In this research, the re-use of a very fine by-product …
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Reduction in the dissolved phosphorus (P) desorption from agricultural soils could be an effective measure to prevent eutrophication. Lime is a high calcium–containing mineral that can have promising but varying responses on P desorption depending on soil type. The main objective of this research was to evaluate and compare the potential of …
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Moreover, the large surface area and redundancy of adsorption sites are important factors for the efficiency of adsorption and removal of pollutants from wastewater. It is, therefore, the objective of this paper to outline and present the classifications, synthesis, and various types of adsorptive membranes.
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By integrating the three parts of the process for MSWI fly ash treatment which has been presented in Fig. 1: leaching, sequential extraction and adsorption, the results from the overall clean-up process for the recovery of Cu and Zn, as well as the removal of heavy metals (Cd and Pb) from the effluent is presented in Table 5 and Fig. …
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This work provides a foundation for in situ (bio)leaching processes of ion adsorption rare earth ores in further industrial tests and production, which would be an eco-friendly alternative to traditional inorganic salt leaching technologies.
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