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Based on resonant micro-cantilever measurements, the metal-organic framework (MOF) nano-crystal material of ZIF-8 is, for the first time, identified as an excellent absorbent to capture/fix the automobile exhaust of NO2 in real atmospheric air. By using MEMS resonant cantilever as material evaluation tool, the adsorbing properties of ZIF-8 to NO2 gas have been experimentally examined not only for...
The present study predicts the feasibility for the adsorptive removal of Victoria Blue dye (VB dye) from aqueous solution using a low cost biosorbent Zizyphus Oenoplia seed (ZOS). In this study, a batch mode adsorption experiments were carried out using various parameters such as pH, contact time, concentration of dye, adsorbent dosage and temperature. The feasibility of the process is evaluated with...
This study is to investigate the feasibility of iron oxide nanoparticles coated expanded graphite (EG) as adsorbents by hydrothermal decoration method for phosphorus removal from aqueous solution. Batch adsorption experiments were performed at various temperatures to investigate thermodynamic of the process using hematite coated EG (Hematite/EG) and FeOOH coated EG (FeOOH/EG). The impact of natural...
The kinetic, equiLibrium and thermodynamics of Cr(VI) adsorption from aqueous solution on cetylpyridinium bromide (CPB) modified zeoLite were investigated. CPB modified zeoLite displayed a good affinity to Cr(VI) in aqueous solution, and its Cr(VI) adsorption capacity decreased with the increase of the temperature. The kinetics of adsorption of Cr(VI) were discussed using the pseudo-first-order and...
Roxarsone is an organic arsenic compound existing extensively in animal wastewater, while multiwalled carbon nanotubes (MWCNTs) is a good adsorbent for the removal of trace organic pollutants from aqueous solution. In this study, the effect of various experimental parameters, such as adsorbent content, initial pH, ionic strength and temperature was investigated using batch adsorption experiment. The...
This paper researched on the adsorption kinetics and thermodynamics of the typical component of petroleum hydrocarbons-phenanthrene on the four typical media: silty sand, medium sand, coarse sand, and gravel sand from the aquifer in an oil field, with a self-made rotary adsorption device. The result showed that the adsorption kinetics of phenanthrene on the four aquifer media accords with the pseudo-second-order...
Adsorption behavior of chitosan composite fly ash (CCF) in adsorption of reactive brilliant blue wastewater were investigated. CCF was characterized by means of SEM and FTIR. Results showed that particle size of CCF is about 2–15µm. The isothermal adsorption follows the isothermal adsorption model of Langmuir. Enthalpy change at adsorption tempertures in range of 288–318K is −21.97 kJ mol−1, which...
Adsorption properties of new rice hull ash (RHA) pretreated by white-rot fungi for oil bleaching process were researched in this paper. The results showed that the adsorption capacity and rate of new RHA were better than that of normal RHA, and the adsorption characteristic conformed to the Freundlich thermodynamic isotherms. The variations of adsorption enthalpy, the Gibbs free energy and the entropy...
An adsorbent was synthesized from modified furfural residue. The properties, kinetics and thermodynamics of methylene blue from water adsorption process on modified furfural residue were studied. The adsorption isotherm indicat that the relationship between adsorbing capacity(qe) and equilibrium mass concentration(Ce) is in accordanced with the isothermal adsorption equations of Langmuir. The sorption...
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...
Inhibition effect of Vanillin-4-methylthiosemi carbazone(VMTSC) and Vanillin-4-ethylthiosemi carbazone (VETSC) for the corrosion on mild steel in aqueous solution containing 1N H2SO4 was investigated by weight loss, potentiodynamic polarization technique, electrochemical impedance spectroscopy and scanning electron microscopy. The results of weight loss study showed that the inhibition efficiency...
The zeolite was used to treat the groundwater. The various solutions with initial manganese (Mn2+) concentration ranging from 0.5 to 1.5mg/L were prepared in this study. The nature zeolite has cation-exchange capacity and higher absorption capacity for Mn2+ from ground water with 1.89 and 2.69 mg/g at 288 and 298K. Adsorption date were well described by the Langmuir model and the thermodynamic constants...
The partial gas release during pumping is considered as a weakly nonequilibrium process and describes the methods of linear nonequilibrium thermodynamics. Streams are linear functions of thermodynamic forces. Force is the relationship of affinity reactions to the gassing temperature parts. As the flows accepted flows constituting the gas phase. The coefficients of proportionality determined from the...
To further understand the nitrogen removal mechanism in leachate treatment using aged-refuse-based bioreactor, 10 year aged refuse was used as adsorbent, ammonium chloride as adsorbate. The adsorption isotherms and thermodynamics, and adsorption mechanism were studied. The results show that: (1) The isothermal adsorption process of NH4+ on aged refuse can be fitted by Freundlich equations with a high...
The effect of solution temperature and the determination of the kinetic parameters of methylene blue (MB) adsorption onto cereal chaff were performed to understand the adsorption mechanism. The pseudo-second order kinetic model was fitted to the experimental data and found it was good to predict the adsorption behavior using nonlinear regressive method, suggesting that the mechanism may be a chemisorption...
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...
The thermodynamics characteristics of Cr (VI) adsorption, the effects of pH, concentration and contact time and the adsorption isotherm line at different temperature from aqueous solution with solphonated lignite under static conditions were studied. The results showed that the Langmuir isotherm equation well described experiment data in dilute solution because fitting correlation coefficients were...
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...
The kinetics and thermodynamics characteristics of Pb(II) and Cu(II) adsorption onto fly ash of a oil shale-fired power plant was investigated by using batch adsorption method. The results showed that Langmuir and Freundlich adsorption isotherms were applicable to the adsorption process, while Freundlich equation is more applicable. The mechanistic steps of the adsorption process was studied through...
In the dissertation, the treatment of chromium containing wastewater using sawdust which is a low-cost biosorbent. The influences of physical and chemical parameters such as pH value, reaction time and temperature and the initial concentration of metallic ion on the adsorption process were investigated by batch adsorption. When the pH value 6, reaction temperature 323 K, dosage of sawdust 6 g/L, the...
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