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Feasibility of preparing mesoporous activated carbons from bamboo solid waste was investigated. The effects of activation conditions, e.g. CO2 flow-rate, activation temperature and retention time, on the characteristics of the activated carbons, i.e. density, porosity, BET surface area, pore size distribution, and surface chemistry were studied. The experimental results showed that it was feasible...
To evaluate the feasibility of ultrasonic regeneration of granular activated carbon (GAC) used in wastewater treatment, we used ultrasound to regenerate GAC which was used to adsorbed low concentration sewage. The ultrasound with different power, frequency and irradiation time was used to regenerate GAC which treated sewage with the concentration of about 25mg/L. The experimental results indicate...
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...
The interaction between nanomaterials and genomes is getting more and more attention. Such studies are getting involved into several fields: environment safety, food safety, nanobiotechnology and drug development. Direct interaction between nanoparticles and DNA in vitro has been reported in several studies, but data for in vivo binding between genomic DNA and nanoparticles are rare. In this study,...
In order to improve the biodegradability of xanthate, the biodegradation process of butyl xanthate as the sole source of carbon and energy was compared to that with an external carbon source added. The experimental results showed that the degradation rate of xanthate was significantly increased in the co-metabolism process. The biodegradation rate of butyl xanthate was 65.2% after shaking culture...
Shijiazhuang has been in visibility impairment situation for many years but with less studied. In this research, we collected the meteorology data and sampled PM10 to measure the mass concentration and total carbon content, in odor to discuss the possible relationship with visibility. The results show that the annually average visibility declines to 10.2-12.7km and monthly average visibility presents...
Coke oven gas is one of by-products generated in the process of dry distillation of coal to form coke. The coke oven gas is of high value in used as not only energy but also chemical material, but it contains hydrogen sulfide (H2S) gas which limits its application. Thus, it is necessary to remove H2S from the coke oven gas in order to use it as energy or chemical material. The thermodynamic analysis...
Microbe produced rhamnolipids are often mixtures containing multicomponent homologues. To understanding the rhamnolipid sorption affected by its homologue compositions is of considerable importance to its application for environmental restorations, including rhamnolipids pump-and-treat for polluted groundwater, rhamnolipids flushing to mobilize hydrophobic contaminants, as well as effects of contaminants...
Iron-carbon microelectrolysis was used to pre-treat straw pulp and papermaking middle stage wastewater. Effect of iron dosage, iron/carbon ratio, initial pH, aeration and aeration pattern on the pollutant removal efficiency was investigated and the biodegradability of wastewater before and after treatment were compared. The results showed that the iron dosage affected pollutant removal slightly in...
In this study, we have investigated the effect of pollutants removal of a vertical multilevel soil infiltration (VMSI) system on municipal wastewater treatment. The VMSI was of 30cm*20cm*50cm column, in which combined stuffing consisted of soil, quartz sand, active carbon and scrap irons were packed. As a result, VMSI system exhibited excellent removal efficiency with 91.7% of COD, 98.4% of NH4+--N,...
The effects of salinity and humic acid (HA) on di-n-butyl phthalate (DBP) adsorption by nutshell-based activated carbon were studied by batch experiments in this paper. Adsorption kinetics was evaluated. The kinetic curves were almost the same both in the presence and absence of NaCl, and second time adsorption occurred in the presence of HA. Three kinetic models, pseudo-first-order, pseudo-second-order...
In order to study the effect of fillers with adsorption and drying on rubbish degradation, leachate production and water quality of leachate, five cylinder reactors for landfill disposal were built to simulate the operation of landfill, one reactor was used as contrast reactor, no filler added in it. Saw powder, activated carbon, zleolite and newspaper were added into another four reactors. In the...
The research chose the alginate sodium and PVA as the materials to immobilize the atrazine degrading bacteria. Four methods were adopted: alginate sodium adsorption method, alginate sodium embedding method, PVA boric cross linking method and PVA freezing method. The degrading effects and the characteristics of the atrazine degrading bacteria in the two materials were studied respectively. The result...
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...
A number of activated carbons had been produced from waste tires by pyrolysis and water activation methods, and they had been modified by sulfur steam at high temperature. Produced sulfur-impregnated activated carbons were examined for their mercuric chloride adsorptive ability by thermal gravimetric analysis. The experiment data show that sulfur should be evenly distributed in the activated carbon...
It is known to all that potential global climate change has a great deal to do with anthropogenic emissions of CO2. The carbon dioxide emissions from the exhaust gases of the fossil fuel-fired power plants account for about a third of global CO2 emissions and are increasing in the last decades. At this context, this work presents a survey on the carbon dioxide capture technologies from the power plants...
The improvement for the yields and mass transfers of polar substances in supercritical CO2 extraction (SCE) are required due to the characteristics of CO2. At extraction pressure 25 MPa, extraction temperature 45°C, extraction time 4 h, and CO2 flow rate 2.0 L/h, total ginsenosides extractions from ginseng in SCE by different enhanced technologies, including modifiers, ultrasound and reverse microemulsions,...
This paper mainly based on the new processes of ozone-floating filter and ozone floatation which were tested in the water from the Queshan Reservoir. The process of ozone floating filter stated that little influence ccurred when the raw water was pre-treated by the ozone. UV254(Ultraviolet Rays)was removed in large amount (76.47%) if the ozone oxidation had been adopted. The removal rate could achieve...
The interactions of mercury with the carbon surface are investigated by performing the density functional electrical structure calculation. The five different carbon groups bonded with the elemental hydrogen and chlorine are proposed to build the carbon surfaces. The calculations are presented for mercury sorption on both on-top (T) and sixfold-angle (A) sites. The adsorption energy curve reveals...
An expanded granular sludge bed packed with porous sponge was started to treat wastewater contaminated by sulfide, nitrate, nitrite and organic carbon compounds. In inflow wastewater, potassium nitrate and sodium nitrite acted as electron acceptors, sodium sulfide acted as electron donor and glucose acted as organic carbon source. In the anoxic reactor, autotrophic denitrification happened together...
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