Removal of heavy metal ions in the presence of the biodegradable complexing agent of EDDS from waters

2013 ◽  
Vol 221 ◽  
pp. 512-521 ◽  
Author(s):  
Maciej Kowalczyk ◽  
Zbigniew Hubicki ◽  
Dorota Kołodyńska
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Complexing Agent

Nitrilotris(methylenephosphonic) acid as a complexing agent in sorption of heavy metal ions on ion exchangers

2013 ◽  
Vol 215-216 ◽  
pp. 948-958 ◽  
Author(s):  
Dorota Kołodyńska ◽  
Marzena Gęca ◽  
Marcin Siek ◽  
Zbigniew Hubicki
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Complexing Agent ◽  
Ion Exchangers

scholarly journals Effects of operating parameters on efficiency of lead removal by complexation-microfiltration process

2012 ◽  
Vol 66 (4) ◽  
pp. 461-467 ◽  
Author(s):  
Katarina Trivunac ◽  
Slavica Stevanovic
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Ph Value ◽  
Complexing Agents ◽  
Complexing Agent ◽  
Lead Removal ◽  
Operating Pressure ◽  
Diethylaminoethyl Cellulose ◽  
Rejection Coefficient

Majority of lead content found in the environment is the result of human activities. Heavy metals can be hazardous because they tend to bioaccumulate. Complexation-microfiltration process for the removal of Pb(II) ions was studied. The aim of microfiltration of the model wastewater containing heavy metal ions was finding an optimum ratio between the concentrations of the complexing agent and metal, and determining the most favorable pH value. The microfiltration experiments were carried out in a stirred dead-end cell. Diethylaminoethyl cellulose (DEAE 23) was selected as the complexing agent. Versapor membranes were used to separate formed polymer-metal complex. The concentration of heavy metal ions after microfiltration in aqueous solution was determined using the atomic absorption spectroscopy (AAS). Effects on the amount of complexing agent, concentration of metal ion, pH value and operating pressure on the flux, J, and rejection coefficient, R, were investigated. Experimental results indicate that the pH of the solution has considerable influence on the rejection coefficient. An increase in pH and the amount of complexing agents enabled us to obtain very high retention coefficient (99%).

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