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- W2589173606 abstract "The potential of rice husk (RH) modified with various carboxylic acids to removeCu(n) from aqueous solution was investigated. It was found that the sorptioncapacity of rice husk was enhanced by this modification. Tartaric acid modified ricehusk (TARH) has the highest sorption capacity for Cu(II). TARH was produced bytreating RH with 1.2 M tartaric acid and heated at 180°C for 10 minutes.In order to understand the sorption characteristics of Cu(II) and Pb(II) by TARH,batch and column studies were performed under various experimental conditions.The parameters studied were pH, temperature, contact time, initial concentration ofmetal solutions, presence of competitive cations and chelators, sorbent dosage, rate ofagitation, particle size of sorbent, bed height, flow rate and sorption-desorption cyclesusing synthetic solution and semiconductor electroplating wastewater. The results of batch studies indicated that the sorption process was pH dependent andexothermic. Kinetic study showed that uptake of Cu(II) and Pb(II) reachedequilibrium after 60 minutes. The maximum binding capacities of the TARH at roomtemperature determined from the Langmuir isotherms were 31.85 and 120.48 mg/gfor Cu(II) and Pb(II), respectively. In the presence of competitive cations andchelators, metal uptake decreased. The affinity of TARH for Pb(II) was greater thanCu(II) on a weight basis. The uptake increased with increasing sorbent dosage andagitation rate.The results of column studies showed that the utilised capacities of TARH at differentbed depths agreed closely with the maximum sorption capacities obtained fromLangmuir isotherm for both Cu(II) and Pb(II). The results also showed thatbreakthrough depended on bed depth, initial influent concentration of metal ion andflow rate. However, the effect of flow rate on sorption was minimal. Therelationship between service time and bed depth was linear. Predicted breakthroughcurves obtained from a two parameter mathematical model for Cu(II) and Pb(II) inwastewater agreed well with experimental values.In sorption-desorption study, Cu(II) and Pb(II) could be removed almostquantitatively by eluting with a 0.1M HCI solution and the column could be usedrepeatedly for at least 5 cycles in the treatment of wastewater." @default.
- W2589173606 created "2017-03-03" @default.
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- W2589173606 date "2001-02-01" @default.
- W2589173606 modified "2023-09-27" @default.
- W2589173606 title "Removal of Copper and Lead From Aqueous Solution by Tartaric Acid Modified Rice Husk" @default.
- W2589173606 hasPublicationYear "2001" @default.
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