Computer controlled-flow injection potentiometric system based on virtual instrumentation for the monitoring of metal-biosorption processes.
A completely automated flow-injection system was developed for the monitoring of biosorption studies of Cu(II) ion on vegetable waste by-products. The system employed flow-through Cu(II)-selective electrodes, of epoxy-resin-CuS/Ag(2)S heterogeneous crystalline type, and computer controlled pumps and valves for the flow operation. Computer automation was done through a specially devised virtual instrument, which commanded and periodically calibrated the system, allowing for the monitoring of Cu(II) ions between 0.6 and 6530 mg L(-1) at a typical frequency of 15 h(-1). Grape stalk wastes were used as biosorbent to remove Cu(II) ions in a fixed-bed column with a sorption capacity of 5.46 mg g(-1), obtained by the developed flow system, while the reference determination performed by FAAS technique supplied a comparable value of 5.41 mg g(-1).
Florido
A
A
Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Av. Diagonal 647, Edifici H Planta 4a, 08028 Barcelona, Spain.
Valderrama
C
C
Nualart
S
S
Velazco-Molina
L
L
Arias de Fuentes
O
O
del Valle
M
M
D000327:Adsorption; D001331:Automation; D003300:Copper / Q000032:analysis* / Q000737:chemistry; D017022:Flow Injection Analysis / Q000379:methods*; D017736:Ion-Selective Electrodes; D011199:Potentiometry / Q000379:methods*; D018030:Silver Compounds / Q000737:chemistry; D014866:Waste Products / Q000032:analysis
D018030:Silver Compounds; D014866:Waste Products; D003300:Copper; C013251:silver sulfide