Environmental effects and desorption characteristics on heavy metal removal using carboxylated alginic acid.
Effects of ionic strength and organic materials on copper ion uptake capacity using carboxylated alginic acid which showed very high metal ion uptake capacity were investigated. The ionic strength only had a slight effect on the decrease of copper ion uptake capacity regardless of NaCl concentration. And, the effect of organic materials such as NTA (nitrilotriaceticacid) and sodium hypophosphite on the copper ion uptake capacity was negligible. When the lead ion adsorbed on carboxylated alginic acid was desorbed by NTA, which showed high desorption efficiency, the best optimum concentration of NTA was about 0.01 M. Also desorption efficiency decreased, however, concentration factor increased as S/L ratio which is defined as the ratio of adding amount of adsorbed and volume of desorbing agent increased. In sequential adsorption and desorption cycles, the lead uptake capacity on carboxylated alginic acid was relatively maintained through cycles 1-5.
Jeon
Choong
C
Chemistry Department, Hunter College of City University of New York, New York, NY 10021, USA. chch1229@hotmail.com
Je Yoo
Young
Y
Hoell
Wolfgang H
WH
D000327:Adsorption; D000464:Alginates / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry*; D006603:Hexuronic Acids / Q000737:chemistry*; D019216:Metals, Heavy / Q000737:chemistry*; D009571:Nitrilotriacetic Acid / Q000737:chemistry; D009994:Osmolar Concentration; D010721:Phosphinic Acids / Q000737:chemistry; D012965:Sodium Chloride; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D000464:Alginates; D006603:Hexuronic Acids; D019216:Metals, Heavy; D010721:Phosphinic Acids; D012965:Sodium Chloride; D020723:Glucuronic Acid; C009287:sodium hypophosphite; D009571:Nitrilotriacetic Acid