Novel combined method of biosorption and chemical precipitation for recovery of Pb2+ from wastewater

A novel combined biosorption-precipitation process has been designed and applied to recycle Pb 2+ from low concentration lead containing wastewater. Pb 2+ was firstly removed selectively from wastewater by pyromellitic dianhydride (PMDA) modified sugarcane bagasse (SB) fixed-bed column, and then, it...

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Bibliographic Details
Published in:Environmental science and pollution research international 2018-10, Vol.25 (28), p.28705-28712
Main Authors: Tang, Jia-qi, Xi, Jiang-bo, Yu, Jun-xia, Chi, Ru-an, Chen, Jia-dong
Format: Article
Language:English
Subjects:
Adsorption
Aquatic Pollution
Aqueous solutions
Atmospheric Protection/Air Quality Control/Air Pollution
Bagasse
Biosorption
Calcium
Calcium ions
Chemical precipitation
Dianhydrides
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Experiments
Heavy metals
Laboratories
Lead
Materials recovery
Metal ions
Organic chemistry
Recycling
Research Article
Sodium phosphate
Sugarcane
Trisodium phosphate
Waste recovery
Waste Water Technology
Wastewater
Wastewater treatment
Water Management
Water Pollution Control
Zinc
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Summary:A novel combined biosorption-precipitation process has been designed and applied to recycle Pb 2+ from low concentration lead containing wastewater. Pb 2+ was firstly removed selectively from wastewater by pyromellitic dianhydride (PMDA) modified sugarcane bagasse (SB) fixed-bed column, and then, it was desorbed into the concentrated eluate and recycled by adding chemical precipitant. Adsorption performance of the column and optimum desorption and precipitation condition for Pb 2+ were investigated in detail. Results showed that the as-prepared column could efficiently remove Pb 2+ from aqueous solution and optimum condition for Pb 2+ precipitation in eluate was at pH 3.0 and molar ratio of precipitant to Pb 2+ of 5:1 by using Na 3 PO 4 as precipitant. Recovery experiment illustrated that Pb 2+ was selectively removed from wastewater containing ions of Pb 2+ , Zn 2+ , Cd 2+ , Ca 2+ , K + , and Na + through competitive substitution adsorption on the modified SB, and mass ratio of the five metal ions in eluate was 96.8:0.7:0.7:0.7:0.5:0.5. Pb 2+ in this concentrated and purified eluate solution was recycled efficiently by adding Na 3 PO 4 . The combined method had great potential in application of heavy metal recovery from wastewater.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-018-2901-6