activated carbon adsorption and environment removal of hazardous gases and vapors

... 86% of COD and 63% of NH4+-N Kurniawan and Lo [11] reported that granular activated carbon adsorption alone could remove about 60% of COD from leachate Studies of leachate by activated carbon adsorption ... using activation temperature of 800 °C, activation time of 2.1 h and flow rate of 68.68 ml/s The optimum DP activated carbon showed COD and colour removal of 42.47 and 39.86%, respectively It ... coefficients and xi, xj are the coded values of the activated carbon preparation variables 2.6 Characterization of DPAC The surface area, pore volume and average pore diameter of the DP activated carbon...

Ngày tải lên: 05/09/2013, 16:10

... modify the surface behavior and adsorption characteristics of activated carbons and make them useful for the removal of hazardous gases and vapors by chemisorption and catalytic decomposition ... Environment: Removal of Hazardous Gases and Vapors 443 8.1 Removal of Volatile Organic Compounds at Low Concentrations .443 8.2 Removal of Oxides of Nitrogen from Flue Gases 445 8.3 Removal ... and industrial flue gases Interest in activated carbon adsorption of gases and vapors received a big boost during and after the first World War, while an increasing attention to the activated carbon...

Ngày tải lên: 11/03/2014, 23:35

... experiments for equilibrium and kinetic studies were carried out in a series of 1000mL flasks Each of them contained 5g of adsorbents (adsorbent dose) and - 45 - Journal of Water and Environment Technology, ... developing and poor countries This work aims to study the adsorption column for removal of arsenic from synthetic groundwater using sequential combination of LA and AC-Fe as adsorbents The effect of ... concentration of 0.5mg/L with a flow rate of 7.75mL/min Activated carbon (AC) is always considered as a typical adsorbent, but AC has low arsenic removal capacity The percentage removal of As[III]...

Ngày tải lên: 05/09/2013, 09:38

... to clarify the effect of DOM and biofilm on the adsorption capacity of PAC in the aeration tank of PACT process Materials and methods 2.1 Operation of powdered activated carbon treatment (PACT) ... effect of biofilm on the adsorption capacity of PAC, PAC covered with biofilm was made and its adsorption capacity was compared to the adsorption capacity of new PAC repeated times For biofilm ... tank, and PAC in the bacterial cultivations Summary and conclusions The objective of this study is to clarify the effect of DOM and biofilm on the adsorption capacity of PAC in the aeration tank of...

Ngày tải lên: 05/09/2013, 08:40

... 3.5 Adsorption kinetic and isotherm models 19 Chapter Adsorption removal of As(V), As(III) and Pb(II) by HCO-AC 21 4.1 Introduction 21 4.2 Results and discussion of As(V) and ... Summary of isotherm fitting for adsorption of As(V) and As(III) on HCO-AC at 25 °C Adsorption dosage 0.1g/L, initial pH 5.0 ±0.1 Table 4.3 Comparison of As(V) and As(III) adsorption capacity of HCO-AC ... (L/mg) The adsorption capacity of the adsorbent is therefore given by the sum of q1 and q2 (mg/g) 20 Chapter Adsorption removal of As(V), As(III) and Pb(II) by HCO-AC 4.1 Introduction Arsenic and lead...

Ngày tải lên: 30/09/2015, 10:12

... copolymer composed of 81% of 3HB and 19% of 3-hydroxyvalerate (3HV) (Sigma-Aldrich Japan K.K., Japan) was used as the standard of 3HV unit in PHA These standards were also digested and analyzed by ... Journal of Water and Environment Technology, Vol 6, No.2, 2008 Technology, China The concentration of PHA in these reactors was determined, and the fractions of carbon stored as PHA ... symbols, Q and r, indicate the flow rate and the recycle ratio of activated sludge And, subscripts, In, I, II, R, and Eff, indicate the influents, reaction tank I, reaction tank II, recycle, and effluents,...

Ngày tải lên: 05/09/2013, 09:38

... KF(L/g) and n are the Freundlich constants which represent the significance of adsorption capacity and intensity of adsorption, respectively KF and n are calculated from the intercept and slope of ... 144 h, at 4.62 mg/L of initial arsenic concentration and 2.5 - 46 - Journal of Water and Environment Technology, Vol 7, No 2, 2009 g/L of adsorbent dose, the percentage removal of total arsenic ... Journal of Water and Environment Technology, Vol 7, No 2, 2009 or difficult to apply in poor and rural areas One of the promising and viable methods for arsenic removal is the adsorption technique...

Ngày tải lên: 05/09/2013, 09:38

... Bed Adsorption for the Removal of Pollutants from Water Environmental Pollution 1990, 66, 33-53 [2] Li, F., Yuasa, A., Ebie, K., and Azuma, Y Microcolumn Test and Model Analysis of Activated Carbon ... density of activated carbons and to determine pHzpc Results and discussion 4.1 Effect of initial dye concentration To investigate the effect of initial dye concentration on the performance of the ... Berner, Z A and Kramar, U Adsorption of arsenic species from water using activated siderite-hematite column filters Journal of Hazardous Materials 2007, 151, 628-635 [14] McKay, G Adsorption of Dyestuffs...

Ngày tải lên: 05/09/2013, 16:11

... Adsorption- desorption isotherms of N2 for AC, modified AC and Cu-AC Journal of Physical Science, Vol 21(2), 29–40, 2010 3.2 35 Removal of RO16 Dye Colour removal (%) Colour removal (%) The removal ... Measurement of interlayer spacing and crystal sizes in turbostatic carbons Carbon, 1(1), 3–9 Noh, J S & Schwarz, J A (1990) Effect of HNO3 treatment on the surface acidity of activated carbons Carbon, ... area The removal is attributed to adsorption of the dye onto the copper oxides and AC Therefore, Cu-AC4 was chosen as the catalyst for removal of RO16 in further experiments 36 Colour removal...

Ngày tải lên: 07/08/2014, 14:20

... = activated carbon, ZC = activated zeolite, MAC = 2.5% (w/w) Se /activated carbon, MAC2 = 5% (w/w) Se /activated carbon and MZC = 5% (w/w) Se /activated zeolite Preparation of Selenium-Doped Activated ... The SBET of MAC material was expected to increase if the quantity of Se decrease For comparison purposes, 5% (w/w) Se /activated carbon (MAC2), SBET of 583.03 m2/g and total pore volume of 368.45 ... Preparation of Selenium-Doped Activated Carbon 12 process that result in the generation of off-flavours that is often associated with the reduction in nutritional value.4 In fact, the quality of the...

Ngày tải lên: 07/08/2014, 14:20

... prepare and study the effect of different pyrolysis temperatures on the development of the porosity of activated carbon derived from oil palm shells activated with ZnCl2 The activated carbon was ... controller Textural Characteristics of Activated Carbons 2.4 Characterization of the Activated Carbons 2.4.1 96 Nitrogen adsorption studies The determination of the adsorption- desorption nitrogen ... (SEM) and Energy Dispersive X-ray analysis (EDX) were used to observe the structural morphology and composition of activated carbon RESULTS AND DISCUSSION 3.1 BET Surface Area of Activated Carbon...

Ngày tải lên: 07/08/2014, 14:20

Ngày tải lên: 14/11/2014, 09:31

... the hydrophobic activated carbon surface These two factors, as well as the high cost of regeneration of activated carbon, limited the application of activated carbon to the removal of humic substances ... to the composition of the raw material and the production process, between 5% and 20% by weight of activated carbon consists of elements other than carbon, primarily metals and surface bound oxygen ... distribution of activated carbon is of great importance Humic substances with larger molecular weight are excluded from the smaller pores of activated carbon, and thus have a lower volume available for adsorption...

Ngày tải lên: 30/09/2015, 06:28

... coverage of on dye and outer of adsorbent 20 40 60 80 loo Agdatlon Fig of equilibrium The equilibrium from effect on adsorption dye and shows 120 lime 140 160 180 200 (min) Effect of agitation time and ... from no change the data were for of the effect dye after Langmuir taken from and batch of agitation dose in absorbance removal and adsorbent desorption adsorption of 10 mg/L greater Several dye ... Fe(III)/Cr(III) Namasivayam of dairy (11) and coworkers from employed solutions of using containing congo fly ash and coal(g) et al (12) have of nickel of this a textile such of chlorophenol study...

Ngày tải lên: 23/09/2012, 14:47

... Sampling point of this study Fig Development areas of bankfiltrate - 134 - Journal of Water and Environment Technology, Vol.1, No.2, 2003 Nanofiltration to hardness removal Nanofiltration experiment ... NTR729-HF(NITTO DENCO) and UTC-20(TORAY) was used The characteristics of membrane were shown in Table Table Characteristics of nanofiltration membrane Percent removal of NaCl Percent removal of MgSO4 at ... day at 20℃ to have adsorption equilibrium It was confirmed that equilibrium was achieved at day RESULTS AND DISCUSSION Nanofiltration of hardness removal Three types of nanofiltration membrane...

Ngày tải lên: 05/09/2013, 08:40

... [1] Department of Water Environment, Ministry of the Environment, Japan July 2002 Outline of Administration of Water Environment P20 (In Japanese) [2] M Soto-Jiménez, F Páez-Osuna and A C Ruiz-Fernández ... and average is 2.3 m Water depth changes around 0.4 m (up and down) by various reasons This plant was floated and fixed at the center of the raft Lake water was - 234 - Journal of Water and Environment ... evidences of the anthropogenic alteration of trace metal composition of the sediments of Chiricahueto marsh (SE Gulf of California), Environmental Pollution, 125(3), 2003, 423-432 [3] S S Lau and L...

Ngày tải lên: 05/09/2013, 08:40

... charcoal, and is adsorption when drainage water contacts the surface of charcoal because of the structure of this equipment Relation of removal ability among substances As the removal ability of a ... the - 13 - Journal of Water and Environment Technology, Vol 7, No 1, 2009 standard deviation (SD) in TP was larger than those of TOC and TN (Table 3) and the reduction rate of TP was distributed ... - Variations of reduction rate for (a) TOC, TN and TP, (b) Cr, Fe, Pb, and Zn, and diurnal variations of contact times during field test Table - Mean and standard deviation (SD) of the concentration...

Ngày tải lên: 05/09/2013, 09:38

... dissociation of added sulfuric acid, reduces the chance of adsorption of organic materials into catalyst surface and therefore the rate of oxidation will be reduced Figure Effect of pH on degradiation of ... Chander S Single component and multi-component adsorption of phenols by activated carbons, Colloids Surf A: Physicochem Eng Aspects 2001,177, 183–196 [9] Dursun G., Dursun A.Y., Adsorption of ... treatment using nanoparticles of TiO2 and UV light The main feature of this work is the use of inexpensive and recoverable catalyst This sort of processes for degradation of organic compounds may...

Ngày tải lên: 05/09/2013, 17:03

... of mTOR and of the insulindependent activation of p70S6K in skeletal muscle [29–31] We compared the time-course of the effect of AICAr with that of rapamycin on ACC and p70S6K, both of which ... limiting Therefore, the effect of different activators of AMPK and the effect of inhibitors of protein phosphatases on the amino-acid-induced activation of ACC and p70S6K were examined in freshly ... of mTOR, the activation of which is required for the activation of both ACC and p70S6K, and one downstream of mTOR which inactivates p70S6K AICAr abrogates the amino-acid-induced activation of...

Ngày tải lên: 22/02/2014, 07:20

... presence of phosphate Although phosphate did not change the shape and slope of adsorption curves, the adsorption edge shifted distinctly to lower pH, indicating the substantial enhancement of Cd adsorption ... only 1.5% and 23% were adsorbed at the same pHs in the absence of phosphate The enhanced Cd adsorption could be attributed to the reduction of the pHzpc (zero point of charge) of goethite and surface ... example, 23% of Cd was adsorbed at 15 min, while 32%, 37%, and 55% of Cd was adsorbed at reaction times of 24 h, days, and Fig Percent Cd adsorption by the phosphate-treated goethite () and untreated...

Ngày tải lên: 15/03/2014, 23:08