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.
2-methylisoborneol (MIB) and geosmin cannot readily be removed by conventional water treatments. Ozonation biological activated carbon (O3-BAC) process is an attractive option for MIB and geosmin removal. For MIB and geosmin with an initial concentration of 500 ng/L, the removal efficiencies of MIB (geosmin) by ozonation, biodegradation and activated carbon adsorption were 51% (73%), 19% (17%) and...
In this paper, stormwater runoff from an urban traffic road and building located in Beijing, China, was characterized to measure the stormwater runoff discharge rates and pollutant concentrations. Based on monitoring, the runoff water quality on two underlying surface conditions was analyzed. The temporal dynamics of chemical oxygen demand (COD), NH3-N, NO3-N and total phosphorus (TP) were similar...
A study was conducted on the adsorption kinetics of diuron from aqueous solutions onto activated carbon fiber. The results showed that the formation of hydrogen bonds between diuron and water, and temperature variations may possibly affect the adsorption process. Furthermore, adsorption of diuron onto activated carbon fiber was affected remarkably by solution pH and the maximum adsorption amount was...
Due to the difficulty of oilfield produced water treatment and low efficiency of coagulation technology. A more efficient treatment technology was necessity. Produced water treatment by ozone enhanced coagulation was investigated in this study in order to develop a new method for oilfield produced water treatment. The results showed that addition of ozone could reduce the dosage of coagulant (PAC)...
A biological activated carbon (BAC) filter was designed for treatment of micro-pollutants in Songhua River. The goal of the study was to characterize bacterial diversity over time and in different spatial regions of the filter and evaluate the effects on BAC performance. The bacterial activity varied over time and the length of the filter. SEM results showed biomass of BAC filter increased during...
The powder activated carbon (PAC) is used as adsorbents to study the adsorption performance of humic acid (HA) in aqueous solutions. The adsorption capacity of HA onto PAC increased with HA initial concentration, and decreased with pH and temperature, The maximum adsorbed amounts of HA onto PAC calculated by the Langmuir model at 25°C is 33.898 mg/g, according to Langmuir isotherm model, The n value...
The aim of this study was to evaluate the effect of powered activated carbon (PAC) addition on algal water treatment by immerged ultrafiltration (UF) membrane, in terms of trans-membrane pressure (TMP) and permeate quality. Experiments were performed with a hollow-fibre polyvinyl chloride (PVC) ultrafiltration membrane at a laboratory scale, based on a time sequence of 120min filtration and 1min backwashing...
Methyl tert-butyl ether (MTBE) is a common additive for producing a clean burning fuel with a higher Octane number and less emissions. Batch adsorptive capacity, continuous flow breakthrough and biological activated carbon (BAC) treatment experiments were conducted to compare the adsorptive capacities of four activated carbons for MTBE, to obtain the adsorptive capacity indicators useful for predicting...
One of China largest river, Songhua River was polluted due to the explosion at a PetroChina factory in Jilin province in 2005. A full scale test was carried out to investigate the removal of nitrobenzene in the raw water from polluted Songhua River. The removal and control effects of nitrobenzene by using Powered Activated Carbon (PAC) absorption and Granular Activated Carbon (GAC) filtration as emergent...
In this paper, start-up of fiber activated carbon for natural start-up in a dynamic flow was discussed, and several physical-chemical, biochemical and microbiological methods (indicators), such as NH3-N, NO2-N, UV254, CODMn, DOC and AOC, were used to characterize the BAC biofilm's composition and activity. The results showed that the mature biofilm was observed after 53 days of incessant operation...
Batch adsorption equilibrium experiments and continuous flow breakthrough experiments were conducted to compare the effectiveness of 7 granular activated carbons (GACs) in removing trichloroethylene (TCE) from groundwater. The order of GACs' adsorptive capacities for TCE was in the same order of their phenol numbers (indicator for internal surface of <;1 nm micropores). A small amount of methanol...
Phosphorus is one of the key elements necessary for the growth of microorganism in drinking water. It stimulates the growth and/or regrowth of microorganism and reduced biostability in drinking water. The demand for effective and inexpensive technology is to increase in response to the widespread recognition of the deleterious health effects of microorganism risk in pipe network. In this study, activated...
Experiments on adsorption for phosphorus by activated carbon, zeolite and ceramisite were conducted. The results show that adsorption capacity order of three filter media from high to low is activated carbon, zeolite and ceramisite. Influential factors which affect the adsorption capacity were surveyed. According to the analysis, the first factor is that surface isoelectric point pH of activated carbon...
Studied was the comparison of ozone-biological activated carbon (O3-BAC) and granular activated carbon (GAC) processes for advanced drinking water treatment. The effects by O3-BAC and GAC were evaluated based on the removal of the indexes including CODMn, UV254, TOC, BDOC, NH4+-N, NO3--N and NO2--N. The results showed that the treatment effect by O3-BAC was better than that by GAC alone. When ozone...
For the advanced treatment of drinking water by activated carbon, the effects of adsorption on removal of dichloroacetic acid, dibromochloromethane, benzene and carbaryl in water, as well as the competitive adsorption between these pollutants were investigated with three different activated carbon (new carbon, regenerated carbon and used carbon). The results showed that good effect of the adsorption...
Batch experiments were conducted to make a comparison in bromate removal between the silver-supported activated carbon (silver-AC) and virgin grander activated carbon(GAC). The probable mechanism of the better behavior of silver-AC was discussed. The effect of initial bromate concentration, pH and co-exist anions were also investigated in the study. Results showed that the removal efficiency of bromate...
DDT is detected in many river and lake in Zhejiang Province. As a kind of POPs and priority controlled substances of China, it is necessary to study how to dechlorinate it and treat it. This thesis discusses the absorption of DDT by activated carbon fiber electrode and the final product. The experimental result shows that activated carbon fiber electrode enhances the rate of dechlorination of DDT...
The formation of bromate by ozonation-biological activated carbon process is a problem of drinking water treatment. By pilot test, the influence of bromide ion concentration, contact time of ozone column, ozone dosage, Ct value, changes of water quality and adsorption time of activated carbon column on bromate formation and control were investigated. The results showed that when [Br-]=100~500??g/L,...
In this paper, the characteristics, size distribution and influencing factors of carbon fines and symbiotic relationships between attached bacteria and fines were detected and analyzed under traditional process conditions. The STXM measurement could be used to judge carbon fines. The number of fines in the GAC effluents during the filtration cycle contented a trend of rise first then fall. And the...
In order to reveal the effect of powdered activated carbon (PAC) pretreatment on Ultrafiltration (UF) membrane filtration performance, PAC-UF system treating Yangtze River water was studied. The results showed: 41.46% of UV254, 31.94% of CODMn, 38.44% of DOC, and 54.69% of THMFP were removed in the PAC-UF system. VHA and CHA could be removed effectively by PAC, which decreased risks of membrane fouling...
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.