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The continuous adsorption of Pb (II) in a fixed column was studied in this work. Shea butter husk was treated in a polymeric mixture of calcium alginate to produce beads of approximately 1.56 mm ± 0.14 spherical shapes. Optimum parameters evaluated revealed an effective column performance at flow rate of 0.5 ml/min, bed heights of 12 cm and at initial concentrations of 50 mg/L. The percentage removal...
The adsorption of two reactive dyes, Orange 16 (RO16) and a Reactive Red 120 (RR120) by Mg/Al-NO3 layered double hydroxide in single and binary mixture (1:1 ratio) was conducted in a batch mode. Spectrophotometric method using first order derivative and zero crossing was applied to analyse colour removal of RO16 and RR120 dyes from solutions. The effects of contact time in single and binary systems...
A scoping investigation was carried out to evaluate the occurrence, persistence and fate of a range of pharmaceuticals and personal care products (PPCPs) at different processing points at three full-scale sewage treatment plants (STPs) at Guangdong, South China. The concentrations of 7 pharmaceuticals from non-steroidal anti-inflammatory analgesics and antihyperlipidemics were examined in each treatment...
Adsorption of molasses effluent by activated carbon (AC) was investigated in this study. The effect of AC type on decolorization rates was compared and influential factors such absorbent doses, initial pH, adsorption time and temperature were evaluated. The results shows that the decolorization capacity is in the order of powered activated carbon (PAC) > granular activated carbon (GAC) > cylindrical...
The purification of phosphate contained the secondary effluent of wastewater treatment plant (WWTP) by fly ash was investigated. The effect of pH, adsorbent dosage, and reaction time on purification efficiency was determined. The results showed that the phosphate the removal rate would increase to 83.3% when the adsorbent dosage was 5 g per 100 ml, the pH was neutral, and the reaction time was 4 h...
This paper investigated the adsorption capacities of crushed oyster shells adsorbent for cadmium and cobalt removal from heavy metal aqueous solution using batch experiments and column experiments. The results showed that: A 24 hour period was considered to provide an adequate contact time between the single-constituent metal ion solutions and the adsorbent to reach equilibrium. The equilibrium adsorption...
The ability of Mg-Fe layered double hydroxide to remove C. I. Reactive Red 2 from aqueous solution was investigated. The influence of molar ratio of Mg-Fe, solution pH, contact time and initial dye concentration on adsorption capacity of C. I. Reactive Red 2 was studied. Batch isotherm studies were carried out on a laboratory scale to evaluate the adsorption capacity of Mg-Fe layered double hydroxide...
Removal of glyphosate from aqueous solutions by using gel basic anion exchange resin N201 was investigated in the paper. The effects of solution initial concentration, temperature, and contact time were studied. Adsorption isotherms were determined using Langmuir and Freundich equations. The results clearly showed that the adsorption of glyphosate onto N201 followed Freundich model and the adsorption...
The performance of low-cost adsorbent such as raw rice husk (RRH) fixed bed column in removing Pb2+ from aqueous solution are studied in this work. Different column design parameters like bed height, flow rate and initial concentration are calculated. It is found that bed height, flow rate and initial concentration were important parameters for evaluating the efficiency of sorbents in continuous treatment...
In order to solve the current situation that low-concentration oxygen-bearing coal mine methane can't be concentrated and utilized, the vacuum pressure swing adsorption process was employed to concentrate the oxygen-bearing coal mine methane gas with the methane concentration of 20%. To ensure the safety of the enrichment process, mixed adsorbents consist of active carbon and carbon molecular sieve...
The anti-ammonia shock load capacity of zeolite-ceramics biological aerated filter is studied. It is turned out that anti-ammonia shock load process can be divided into two processes of absorption and release, during which the effluent ammonia nitrogen concentration is always less than 4mg/L. In adsorption process, the ammonia nitrogen removal mainly occurs in the 0~35cm zeolite layer, accounting...
The pulp & paper industry generates a considerable amount of wastewater in its manufacturing processes. Currently, the pulp and paper industry is facing more stringent standards for discharges of wastewater and associated permits. Biological processes such as activated sludge and aerated lagoons are conventionally used to treat pulp mill effluents. However, these processes have limited ability...
The random stack of oil shale slag brings a series of ecology and the environment question. This article take the oil shale slag as the primary material, uses the stage elevation of temperature rule to explore oil shale slag ceramsite, and then studies the adsorption on Cu2+ in effluent under the different environmental condition. The test results indicated that the ceramsite may achieve the adsorption...
The effectiveness of coagulation/flocculation/ sedimentation (CFS), carbon adsorption, and CFS+carbon adsorption for advanced treatment of a biologically treated coking plant effluent was studied. The CFS treatment was cost effective for producing an effluent reusable as cooling water (CODCr<;100 mg/L). Carbon adsorption accomplished the same recycling treatment at a higher cost. Both carbon type...
A previous study using the batch method showed that sorption behavior of Perchloroethylene (PCE) in low organic content (0.080~0.090 % foc) aquifer sand was nonlinear and fitted the amended dual-mode model (DMM). This study aimed to investigate the transport of PCE in same media using finite duration and continuous input of solute in laboratory column tests. The experiments showed that the transport...
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...
This paper aims at exploring the feasibility of adsorption filtration technology using reclaimed iron sludge coated sand (RISCS) as filter media for municipal wastewater reuse. The iron sludge as surplus waste solution derived from ferric-carbon micro-electrolysis process. Scanning electron microscope (SEM), Infrared spectroscopy (IR) and X-ray diffraction (XRD) analysis were used to investigate the...
Washing coal usually brings about 0.2m3/t wastewater (in terms of closed circulation) due to transpiration, which provides an effective space for the recycle of coke-plant wastewater. The effluent from phenol-cyanogen wastewater biochemical disposal station is used as complementary water for washing coal, and Closed-Cycling System in coal preparation plant is introduced to make industrial experiment...
The performance and enhancement of pollutants removal in raw municipal sewage by a new pretreatment process were investigated in this study. The experiments were carried out with a GS sedimentation tank in full scale plant. The results revealed that average removal efficiency of TP, TSS, and TN achieved 49%, 67.3% and 20% respectively during stable running period. TSS removal rate could achieve about...
The study evaluated the sorption of Zn(II) ions from aqueous solution by two low-cost materials, waste somatic and dead tea fungus. The rate and extent of accumulation were affected by pH, contact time and initial zinc ion concentration. The initial removal was rapid and equilibrium was established in less than 30 min. Good correlation coefficients were obtained when the pseudo-second-order kinetic...
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