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Landfill leachate is a complicated refractory wastewater which contains huge amount of organic compounds and ammonia. Recently, the adsorption technology exploiting on activated carbon has gained promising importance in the treatment of landfill leachate due to its simplicity in design and low preparation cost of activated carbon in addition to high treatment efficiency. In this study, the physical...
Abundant of estrogens is excreted via human urine, bringing the risk of micro-pollution during nutrients recovery from urine. This study investigated the characteristics of estrogens during the ammonification of urine, and then experiments were conducted to study the adsorption of estrogens on struvite, a potential product to recover nutrients from urine. The results showed that no 17a ethinylestradiol...
Adsorption of humic acid (HA) and Cu(II) onto cetyl pyridinium bromide (CPB) modified zeolite was investigated in single- and binary-adsorbate systems. The equilibrium adsorption data of HA and Cu(II) onto CPB modified zeolite in the single-adsorbate system were analyzed by the Langmuir and Freundlich isotherm models. The equilibrium adsorption data were well described by the Langmuir isotherm model,...
Treatment of the wastewater containing amantadine hydrochloride with adsorption in order to achieve lower the effluent COD of amantadine hydrochloride. A comparison of the adsorbents (activated carbon, diatomite, zeolite, slag and steel slag, etc.) on amantadine hydrochloride water the maximum saturation capacity and adsorption isotherms, and the factor of economic, to finalize a kind of the adsorbents...
TiO2 is the most frequently employed photocatalyst in realising complete mineralization of organic pollutants in water treatment. Its large bandgap energy necessitates though UV excitation to induce charge separation within the particle. Nitrogen doped into substitutional sites of TiO2 has shown bandgap narrowing and photocatalytic activity in the visible light. N-doped and non-doped mesoporous titania...
Factors affecting the use of cheap and ecofriendly pretreated bagasse for potential removal of methylene blue (basic dye) and orange II (acid dye) from wastewater were studied. Sugarcane bagasse was pretreated with propionic acid with the aim to effectively adsorb the above mentioned two dyes at varying dye concentrations, adsorbent dosage, pH and contact time. The kinetics of dye sorption processes...
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...
Glycin functionalization of spherical cellulose was prepared and its application in the removal of chromium ions was investigated. The structural properties of the resulting composite material were characterized by Fourier transform infrared spectrum (FT-IR) and scanning electron microscope (SEM). The ability of the composite material for removing Cr3+ from aqueous solution was studied by batch experiments...
Perfluorooctane sulfonate (PFOS) has increasingly attracted global concerns in recent years and has also been proposed as the candidates of persistent organic pollutants due to their world-wide distribution, environmental persistence and bioaccumulation potential. The adsorption mechanism of PFOS from aqueous solutions onto granular activated carbon (GAC) was investigated. The adsorption reaction...
Adsorption test for phenol-containing wastewater from a coking plant was carried out using Specially-made activated carbon. The reaction mechanism and influencing factors, such as the dosage of Specially-made activated carbon, pH, temperature and time on decomposition of phenol for the treatment of phenol-containing wastewater by Specially-made activated carbon were mainly studied. The proper conditions...
BTEA-Bentonite by intercalation of surfactant benzyltriethylammonium (BTEA) was described. Product was characterized by XRD and IR techniques. The adsorption properties of BTEA-Bentonite for Crystal violet is investigated, and the results show that the sorption isotherms fit the Freundlich model very well. The adsorption process of Crystal violet onto BTEA-bentonite was spontaneous, endothermic physisorption...
Tetracycline is a series of emerging pharmaceutical and personal care products (PPCPs), which has been caught increasing concern in recent years. As a new type of carbon materials, activated carbon fiber (ACF) demonstrates its excellent adsorption performance especially in organic pollutants removal. ACF was used for tetracycline removal by adsorption and the effect of ACF dosage, contact time, salinity,...
Surfactants have been widely used for extracting hydrophobic organic compounds from soils into aqueous phase. Non-ionic surfactants such as Triton X-100 and anionic surfactants such as SDS (sodium dodecyl sulphate) have been of particular interest because of their high solubilizing ability and low toxicity. However, the resulting wastewater that contains both surfactant and organic contaminants should...
The decomposition of high concentration pentachlorophenol (PCP) loaded on granular activated carbon (GAC) was studied by dielectric barrier discharge (DBD) plasma. The effects of discharge voltage, treatment time, gas kinds and flow rate on PCP degradation efficiency were discussed. The results indicated that increasing discharge voltage and treatment time could enhance the degradation efficiency...
The preparation of magnetic chitoson bead by chemical conversion method has been investigated, and the IR has been used for ensuring the structure of the magnetic chitosan bead. The effects of various factors on the adsorption of Cu(II) are discussed including pH, adsorption time and adsorption temperature. The best adsorption conditions are pH 5.5, adsorption time 60 min, adsorption temperature 30degC...
With an adsorption-biodegradation anaerobic sequencing batch reactor(AB-ASBR) operated at mesophilic temperature, the adsorption and regeneration processes at low organic loading rate (OLR) were studied. The optimal adsorption time and regeneration time were investigated. Results indicated that in 20 min, the chemical oxygen demand(COD) removal by adsorption usually reached maximum value, and the...
Put dead immobilized beer yeast into column of continuous-upflow reactor, study adsorption characteristics on Cu2+ through axial-magnification and axial-radial-magnification tests of column and industrial wastewater treatment. The results showed: with initial Cu2+ concentration 20 mg/L, in axial- magnification test and axial-radial-magnification tests, flow rates of 35 mL/min and 100 mL/min were optimal...
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