The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A zirconium hydroxide coprecipitation method for the determination of As, Cd, Ni, Mn, Fe, Pb, Cu and Co by inductively coupled plasma atomic emission spectrometry in waste water of feed additive zinc sulfate has been investigated. The coprecipitation conditions, such as the effect of the amount of zirconium solution, the aged time of precipitation, the enrichment factor and the possible matrix ions...
Smectite supported Pd0/Fe0 bimetallic systems with different palladium and/or iron loading were prepared. Effect of pH, palladium content, and iron content on pentachlorophenol (PCP) dechlorination rate was investigated in this study. The pseudo-first-order kinetic model was employed to fit the dechlorination data. The results show that the dechlorination rate constant decreases linearly as we increase...
Smelting reduction iron making technology will solve the coke shortage and environmental pollution, which has become a major research of. Iron development. By oxygen top-blown high-phosphorus iron ore smelting reduction test, that the use of oxygen top-blown molten high phosphate smelting reduction technology is feasible, and inappropriate smelting conditions, the iron recovery rate can reach 95%...
The present paper discusses the technical characteristics of the converter duplex melting process(MURC), develop one special converter duplex melting process with low hot metal ratio to meet the actual producing condition of Fujian Sangang steel group. Research show, how to promote the melting of lime during dephosphorizing period is the key step for MURC process. Adjusting the charging amount of...
The problem of arsenic pollution in the ground water of West Bengal (WB), India may be a geochemical happening, but the matter is yet unsolved. To identify correlation amongst the ground water parameters (GWP), fuzzy regression analytical technique has been utilized and it is established that Na, K, Fe, pH and hardness have distinct correlations in arsenic prone areas and non-arsenic prone areas.
An embryo development assay using a common test organism, the edible mussel (Mytilus galloprovincialis), exposed to both Fe 2 O 3 nanoparticles and soluble FeCl 3 at 3 acidic pHs, has provided evidence for the following: (1) CO 2 enriched seawater adjusted to pH projections for carbon capture leakage scenarios (CCS) significantly impaired embryo development; (2) under...
Microwave assisted Fenton process with zero value metallic iron (MW/Fe0/H2O2) is studied to degrade 4-nitrophenol (PNP) in the aqueous solution. An experimental design was conducted to assess the influences of various parameters on the degradation rate, such as pH value, initial PNP concentration, iron dosage, concentration of H2O2 and microwave energy output. PNP was degraded completely by this method...
Abstract- There were many problems such as low purity, high cost in traditional technology of ferrate production. Now a new craft about producing high purity,low cost ferrate was researched. First,divalent iron (FeSO4) as raw material preparation was oxidized to prepare Fe2O3, then regarding Fe2O3 as iron source to make ferrate by oxidizing hypochlorite;The ferrate salts were mixed with different...
This study investigates the effect of converter slag- a by-product of steel industry- as an iron fertilizer on Fe and pH of some calcareous soils. Slag used contained approximately 24% of iron oxides plus a relatively large amount of calcium, silicon, phosphorus, and manganese. An incubation study was conducted with 3 calcareous soils for up to 2 months and the treatments included various amounts...
The aim of this study was to access the pH and soil degradation. Soil samples collected in eleven zones among three locations by zone were analyzed in the laboratory through pH Meter and the results indicates that pH of all soil samples is less than 5 (pH<;5) and the general average was found to be 4.4. Heavy materials like Fe, Cu, Mn, and Zn presented a high concentration level. The elements H...
Photo-Fenton reaction is a kind of advanced oxidation technology based on the reaction of hydroxyl radical. In order to further enhance the photocatalytic efficiency, with citric acid as the catalytic additive, and malachite green as the substrate, experiments on the photocatalytic oxidation of organic pollutants in UV/Fenton/Citric acid system were carried out. Effect of Fe(II) concentration, initial...
In this paper, two kinds of fluorine-contaminate soils, fluvo-aquic soil and paddy soil, were cultivated by nitrogen fertilizer. Then, we studied the various fluorine species in the cultivated soil by sequential extraction method, and study the effect of main components in nitrogen fertilizer on pH of soils. After adding nitrogen fertilizer, the pH value of soil would increase, which consequently...
In this paper, the degradation of 2,4,6-trichlorophenol (TCP) by hydrogen peroxide catalyzed by nano-iron was studied. Nano-iron was obtained through chemical reduction of FeSO4·7H2O and KBH4. The influences of pH, the concentration of H2O2, temperature, ionic strength and the amount of nano-iron on the degradation of TCP were investigated. The result showed that under the optimized condition, more...
Phosphorus is often a limiting factor for the eutrophication of surface waters. An efficient removal of this constituent from the effluent of municipal wastewater treatment plants has been of growing interest. Alum salts (AlCl3, Al2(SO4)3) and iron salts (FeCl3, FeSO4) are the commonly used chemical coagulants for the removal of phosphorus. The aim of the present work was to evaluate the coagulation...
The water quality in rainfall, throughfall, stemflow and litterthrough in the Fraxinus mandshurica at Eastern Mountainous Region in Heilongjiang Province had been studied. The indicator included pH, Do, TURB, TDS, COND, ORP, K, Na, Ca, Mg, Cu, Zn, Mn and Fe. The results showed that the chemical properties of rainfall has been changed after it passing through forest canopy. The value of Do and ORP...
The removal of phosphate by KMnO4-Fe(II) process was investigated under different experimental conditions. The results showed that mix speeds and settling time had no significant effect on phosphate removal. The removal of phosphate was gradually increased with the increase of Fe dosages and decreased with the increase of pH. When the pH increased from 4 to 9, the removal of phosphate decreased from...
In resent years, various types of iron-based materials have been used as sorbents to remove heavy metals from wastewater. It is reported that the adsorption capacities of heavy metals on different kinds of iron oxides are quite high. However, researchers have not done much work on the Cr (VI) adsorption onto β-FeOOH. This study aims to investigate the removal of Cr (VI) with β-FeOOH, including the...
In this paper, advanced oxidation process utilizing Fenton's reagent was investigated for degradation of the C.I. Acid Blue 9 from aqueous solution. Some important operation parameters, such as pH value of solutions, iron and hydrogen peroxide concentration, temperature and presence/absence of chloride ion, which effect on the decolorization of the C.I. Acid Blue 9 from aqueous solution by Fenton...
Batch experiments were conducted to investigate the kinetics of uranyl removal by zerovalent iron (ZVI) as well as the impact of environmental factors on this process. The result suggests that the aqueous uranyl cations can be reductively removed by ZVI. The uranyl immobilization was little affected by reaction temperature, indicating that this process was a chemical-controlled reaction mediated by...
During the dechlorination of 2,4-dechlorophenol(2,4-DCP) by zero-valent iron(ZVI), pH was one of the important factors affecting the dechlorination. The adsorption of chlorophenol by ZVI and the dechlorination rate were influenced by pH. The dechlorination of 2,4-DCP by ZVI was pseudo-first-order reaction, the pseudo-first-order reaction rate constant (KSA) were respectively 0.1773 h-1, 0.2943 h-1...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.