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The process conditions of adsorbing Cr(VI) from solution when chitosan and complex agent serves as adsorbent were discussed. The results showed that when the initial concentration of Cr(VI) was 10 mg/L, at room temperature, pH value was about 4, rotation speed was 200 rpm, the dosage of chitosan was 0.003 g/ml for 2 h, the percent removal efficiency of Cr(VI) could reach 49.2%. Additionally, the complex...
Bio-sorption of Pb2+ ion from wastewater with Chlorella was investigated in the batch mode. The influence of pH of the solution, biosorbents dose, concentration of ions and contact time on bio-sorption capacity of Pb2+ ions was studied. The studies revealed that Pb2+ ions uptake rate was rather slow, with 75% of the total amount occurring in the first 10min for Chlorella. The optimum pH for bio-sorption...
Using the anaerobic granular sludge acted as biosorbent, this paper studied the biosorption and desorption of copper-containing wastewater. The results showed that, granular sludge adsorption rate up to 97.67% and citric acid got best desorption efficiency. The study of kinetics model and thermodynamics isotherm adsorption model showed that Pseudo-second Order kinetic model and Langmuir isothermal...
Batch experiments were carried out to determine the capacity of Pseudomonas fluorescens biomass to adsorb Sr(II) ions from aqueous solution with respect to pH, initial Sr(II) concentration, contact time and biomass dose. The FTIR results of Pseudomonas fluorescens biomass showed that biomass has different functional groups and these functional groups are able to react with metal ion in aqueous solution...
The present study was undertaken to evaluate the feasibility of Pseudomonas alcaligenes biomass for the removal of strontium ions from aqueous solutions. Batch experiments were performed to study the adsorption of strontium on pH, Pseudomonas alcaligenes biomass adsorbent with respect to initial Sr(II) concentration, contact time and biomass dose. The experimental data were modeled by Langmuir and...
In the present study we reported the feasibility of extra cellular biopolymer( PFC02) produced by Pseudomonas alcaligenes as an alternative biosorbent to remove Co(II) metallic ions from environmental and industrial wastewater. The effects such as pH, dosage of biosorbent, Co(II) initial concentration and sorbate-sorbent contact time and agitating speed on the adsorption capacities of PFC02 were studied...
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...
Adsorption of heavy metals ion by microorganisms is emergying technology to treat wastewater. In this study, the cadmium-resistant Pseudomonas aeruginosa E1 was investigated in absorption of cadmium ion from solution. The effects of polluted solution initial pH, biosorption time, and cadmium ion concentration and biosorbent amount on biosorption efficiency were investigated. The cadmium removal percent...
This paper uses the closed circulatory coal gas of coking plant to replace water vapour of the traditional ammonia stripping method to treat coking wastewater containing ammonia. The removing rate of NH3-N is 99.57% in the intermittent experimentation, the target of NH3-N can reach the national discharging second standard. On the basis of this, by simulating industrialization continuous experimentation,...
Aqueous solubility are key attribute of pollutants. Typical pollutants in coke plant have different aqueous solubility. However, the aqueous solubility of pollutants effect on the biodegradation during the A1-A2-O System is unclear. We compared the biodegradation of typical pollutants-pyridine, 2-methylpyridine, and quinoline with different aqueous solubility in coke plant used as the sole carbon...
Constructed rapid infiltration system ( CRI ) is simulated through two groups of 3 soil columns with the height of 30 cm, 55 cm and 80 cm respectively. After pretreatment, the mixed wastewater of regenerated-paper making is put into the six soil columns. There are 16 kinds of hydraulic loading cycles made of 4 kinds of flooding-drying ratios (1:6, 1:4, 1:2, 1:1) and 4 kinds of flooding time (4 h,...
The demand for effective and inexpensive sorbents is increasing in response to the widespread recognition of the deleterious health effects of heavy metals exposure through aqueous solutions. An adsorbent, bio-formulation (BF), was prepared by agricultural waste. The maximal biosorption removal of cadmium (II), lead(II), copper(II), zinc(II) on BF are 99.4, 99.8, 97.6, 98.3% at pH 8, 5, 5, 7, respectively...
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...
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