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The removal of Cu2+ and Cd2+ of aqueous solution by residual sludge from four type sewage treatment plant was investigated. Effect of adsorption time, kinetics and thermodynamics of adsorption was researched. The study indicated that all of the sludge can absorb mono-component Cu2+ or Cd2+ but the sludge from Petrochemical Wastewater plant had deposition rather than adsorption on Cu2+ or Cd2+. The...
Aimed at the current situation of nitrogen pollution in groundwater, adsorption characteristics of ammonia-nitrogen onto different lithology named silty sand, silty clay and clay were studied. The results indicated that the process of ammonia-nitrogen adsorption onto soils mainly occurred within 0~2 h, then attended to a dynamic equilibrium. Two kinetic models can describe the experiment data and...
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...
An anion surfactant modified bentonite (SDS-Bt) was synthesized and characterized in order to study the adsorption behavior and the removal of Methylene Blue (MB) dye from aqueous solutions. The adsorption properties, kinetics and thermodynamics mechanism of MB on Bt and SDS-Bt were discussed in combination with the results of experiments. Adsorption data were analyzed according to Freundlich, Langmuir,...
Based on the data of single atrazine (AT) adsorption, co-sorption of AT and cadmium (Cd), and co-sorption of AT and malathion (Ma) onto surficial sediments (SSs), a BP artificial neural network (ANN) model was established, in which the inputs were selected as concentrations of AT, Cd, Ma and the output was the amount of AT adsorption onto SSs, in order to simulate the interaction of co-existed Ma...
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...
The purpose of this work was to investigate the kinetics of the adsorption and biodegradation process in adsorption-biodegradation anaerobic sequencing batch reactor (AB-ASBR). Using the whole milk powder as substrate, the volume loading rate (VLR) of influent was 7.0kgCOD / (m3 · d) at 35°C. In order to maintain the optimal pH value, NaHCO3 was added into the influent. The experiment indicated that...
In this paper, the HCl removal ability of a multi-metal adsorbent was investigated in the temperature range of 573-873K. The results showed that the adsorbent had an excellent activity for HCl removal, and its breakthrough chlorine content reached 42.53% at 773K. Besides, the reaction kinetics of the adsorbent with HCl was also studied at temperatures from 573 to 773K. Simultaneously considering the...
TiO2 catalyst was prepared by two kinds of different methods. The photocatalytic activity of TiO2 prepared by the hydrothermal method is 2.5 times higher than that by sol-gel in degradation dimethyl phthalate (DMP). The combined photocatalysis with UV irradiation and ozonation (TiO2/UV/O3) process considerably improved mineralization and degradation of dibutyl phthalate compared to combined photocatalysis...
In the present study we reported the feasibility of extracellular biopolymer(PF-9) produced by Pseudomonas fluorescence C-9 as an alternative biosorbent to remove Ni(II) metallic ions from environmental and industrial wastewater. The ability of PF-9 to remove the Ni(II) ions was investigated by using batch biosorption procedure. The effects such as pH, dosage of biosorbent, Ni(II) initial concentration...
The internal ring matrix distribution of many special ceramic porous medium tubes on a circular plate constitutes an adsorbent device, which can retain nanoparticles aerosol agglomerate by the way of collision, adsorption and diffusion in the process of mass transfer. In this paper, the behavior of industrial flue dust diffusion in the ceramic porous medium device is researched by computational fluid...
Over the past several decades, trace heavy metal ion pollution, such as Cd(II), Cu(II), Pd(IV), etc., have attracted much attention because of their virulent and hard degradation properties. Recently, great efforts have been devoted to establish new methods and technologies to removal toxic metals. Among them, activated carbon adsorption, especially the modified activated carbon technology has been...
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