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.
Interdigitated Electrode are known as one of the hallmark of biosensors because of its numerous applications. Biosensors projects to be preferable devices especially in hospitals and other medical faculties as well as in other interdisciplinary fields because of its small size and high sensitivity. Since size plays a salient role in sensitivity and selectivity, in this research, 140 nm IDEs and 50μm...
In recent days, the most important problem that our society faces is low quality of drinking water. Water quality monitoring is important because contaminated drinking water can spread diseases faster than any other sources. With existing techniques, the general public is not aware of the potability of water. Lack of accurate and efficient low cost systems are a reason for poor awareness on the same...
In this study, we investigated the ionic current rectification of glass nanopipettes modified with bovine serum albumin glutaraldehyde (BSA-GA) artificial membrane using solutions with various pHs. Ionic current rectification is a phenomenon that is observed with nanopores as asymmetric I-V curves, where the ionic currents recorded through a nanopore differ at the same magnitude of applied electrical...
Long-term in situ pH measurements in the extreme conditions of the deep ocean remain a challenge for many oceanographers. Until recently pH in the deep ocean was measured by traveling to a specific location on the ocean surface, obtaining a seawater sample at a specific depth and analyzing the sample using pH indicator dye spectrophotometry. This process is laborious, time-consuming, expensive, and...
Taste is the effect of chemical reaction between substances in mouth with the taste receptor cells. Humans detect taste with taste receptor cells. Taste can be of various forms like sweet, salty, bitter, sour, umami etc. We cannot identify taste of sample or solution unless and until it is tasted by human tongue. The dissolved molecules and ions of a solution will decide the pH and conductivity of...
The present investigation shows that the agricultural by-products like bengal gram husk, tur dal husk, and tamarind husk can be used as an effective adsorbent for the treatment of wastewaters containing metals like chromium (VI), iron (III), nickel (II) and mercury (II). The term biosorption commonly refers to the passive binding of metal ions or radioactive elements by dead biomass. It has to be...
Bio-sorption of Pb2+ ion from wastewater with Chlorella was investigated in the batch mode. The influence of pH of the solution, biosorbents dose, concentration of ions and contact time on bio-sorption capacity of Pb2+ ions was studied. The studies revealed that Pb2+ ions uptake rate was rather slow, with 75% of the total amount occurring in the first 10min for Chlorella. The optimum pH for bio-sorption...
The application of the reverse osmosis (RO) and nano-filtration (NF) membranes in the ammonia nitrogen separation of paraquat wastewater was studied. The parameters of membrane flux, operating pressure, concentration and pH, and temperature etc, which affect membrane separation performance were investigated. The results showed that the rejection rate of the ammonia nitrogen were 37% and 65%, the removal...
The removal of ammonia from aqueous solutions using zeolites (ZFAs) synthesized from coal fly ash (CFA) as low-cost absorbent was investigated in a batch mode. When raw CFA was subjected to alkaline hydrothermal zeolite synthesis, the Zeolite X (ZFA-X) and zeolite A (ZFA-A) were formed. ZFAs had a much greater ability than CFA to remove ammonia. The pH strongly influenced ammonia removal by ZFAs....
Many Chinese small electroplating enterprises usually discharge mixed electroplating wastewater which contains CN-, Cr(VI), Cu2+, Zn2+ and other toxic heavy metals. It is hard for efficiently treating this mixed wastewate. At present, conventional chemical methods could usually meet discharge standard, but may not meet recycling need. In this paper, a combined treatment process include O3 oxidation,...
Cr(VI) has posed great threat on environmental safety and human health, thus the remediation of Cr(VI) pollution is of considerable importance. The adsorption of Cr(VI) from aquatic solution using activated carbon was studied in this paper. The Cr(VI) sorption was relative to pH, contact time, initial content of solution, adsorbent dose and temperature. The maximum removal efficiencies of Cr(VI) were...
Removal of Cu2+, Cd2+, Pb2+ and Zn2+ in wastewater was investigated using steel slag as a treatment material, and then mechanism of removal was discussed according to main crystalline phases in steel slag and Zeta potential of steel slag. The results showed the steel slag was a very suitable multi-functional material for the treatment of wastewater containing Zn2+, Cu2+, Cd2+ and Pb2+. Under treatment...
In the present study we reported the feasibility of Pseudomonas alcaligenes biomass as an alternative biosorbent to remove Pb(II) metallic ions from environmental and industrial wastewater. The ability of Pseudomonas alcaligenes to remove the metallic ions was investigated by using batch biosorption procedure. The effects such as, pH, biosorbent dosage, sorbate concentrations and sorbate-sorbent contact...
In the present study we reported the feasibility of extra cellular biopolymer( PFC02) produced by Pseudomonas alcaligenes as an alternative biosorbent to remove Co(II) metallic ions from environmental and industrial wastewater. The effects such as pH, dosage of biosorbent, Co(II) initial concentration and sorbate-sorbent contact time and agitating speed on the adsorption capacities of PFC02 were studied...
The work investigated that δ-MnO2 / Polymeric ferric sulfate (PFS) treated on electroplating wastewater containing heavy metal ions Cu2+, Pb2+, Cr3+. Effect adsorption on the pH, the amount of adsorbent, the input order and ratio of δ-MnO2 / PFS, the research determined the laboratory simulated electroplating wastewater treatment process and other basic parameters. The results showed that the best...
The red clay was used as absorbent to treat fluoride wastewater by adsorption. And the effects of liquid-solid ratios, pH and reaction time on removel of fluoride were investigated. The results shown that the removel fluoride was realizable by physical and chemical adsorption, and the physical adsorption was dominant. The liquid-solid ratios, pH and reaction time were 50g/L, 9.0 and 1.5h, respectively,...
The performance of electro coagulation, with thirty-one aluminum electrodes coated with a layer of graphite, in the treatment of metal ions (Cu2+, Zn2+ and Cr6+) containing wastewater, had been investigated. The basic principle of electrolysis and several working parameters, such as pH, operating time and connection mode were deeply analyzed. The results show that monopolar connection is the most...
This study evaluated the effects of salinity and alkalinity of soil on growth of Haloxylon sp. in Segzi plain. Segzi plain is located in the Eastern part of Isfahan province in the center of Iran and is about 40 kms from Isfahan center. The phenomena of salinity and alkalinity are the key factors in the process of desertification that are mainly created in semiarid and arid regions. One way to prevent...
In this paper we presented influence of acidity on nanopowder structure prepared in reaction of precipitation. Zinc oxide was prepared from zinc nitrate and sodium hydroxide with the participation of the microwave field. The investigation revealed that the grain size of zinc oxide and their microstructure significantly depends on the solution pH. The microstructures obtained in the more alkaline reaction...
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...
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.