A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Batch and Column Scale Removal of Cadmium from Water Using Raw and Acid Activated Wheat Straw Biochar
The present study examined novel wheat straw biochar (WSB) and acid treated wheat straw biochar (AWSB) for cadmium removal from contaminated water. A series of batch and column scale experiments was conducted to evaluate the potential of WSB and AWSB for cadmium removal at different biochar dosage (0.5−8 g/L), initial cadmium concentration (5−100 mg/L), solution pH (2−8) and contact time (5−180 min). Results revealed that cadmium adsorption decreased by increasing biochar dosage from 0.5 to 8 g/L; however, optimum dosage for maximum (99%) removal of cadmium was 2 g/L by WSB and 1 g/L by AWSB. Enhanced cadmium removal potential by AWSB is attributed to increased surface area, microporosity and variation in functional groups. Equilibrium experimental data was well described by Freundlich adsorption isotherm whereas kinetic data were better explained with pseudo-second order model. Both WSB and AWSB have shown good adsorption capacity of 31.65 mg/g and 74.63 mg/g, respectively, that is comparable with other costly adsorbents. Columns packed with WSB and AWSB at laboratory scale have also shown good retention of cadmium with excellent reusability. These findings indicate that WSB especially AWSB could be a promising, cost-effective and environmental friendly strategy for the removal of metals from contaminated water.
Batch and Column Scale Removal of Cadmium from Water Using Raw and Acid Activated Wheat Straw Biochar
The present study examined novel wheat straw biochar (WSB) and acid treated wheat straw biochar (AWSB) for cadmium removal from contaminated water. A series of batch and column scale experiments was conducted to evaluate the potential of WSB and AWSB for cadmium removal at different biochar dosage (0.5−8 g/L), initial cadmium concentration (5−100 mg/L), solution pH (2−8) and contact time (5−180 min). Results revealed that cadmium adsorption decreased by increasing biochar dosage from 0.5 to 8 g/L; however, optimum dosage for maximum (99%) removal of cadmium was 2 g/L by WSB and 1 g/L by AWSB. Enhanced cadmium removal potential by AWSB is attributed to increased surface area, microporosity and variation in functional groups. Equilibrium experimental data was well described by Freundlich adsorption isotherm whereas kinetic data were better explained with pseudo-second order model. Both WSB and AWSB have shown good adsorption capacity of 31.65 mg/g and 74.63 mg/g, respectively, that is comparable with other costly adsorbents. Columns packed with WSB and AWSB at laboratory scale have also shown good retention of cadmium with excellent reusability. These findings indicate that WSB especially AWSB could be a promising, cost-effective and environmental friendly strategy for the removal of metals from contaminated water.
Batch and Column Scale Removal of Cadmium from Water Using Raw and Acid Activated Wheat Straw Biochar
Muhammad Asif Naeem (author) / Muhammad Imran (author) / Muhammad Amjad (author) / Ghulam Abbas (author) / Muhammad Tahir (author) / Behzad Murtaza (author) / Ali Zakir (author) / Muhammad Shahid (author) / Laura Bulgariu (author) / Iftikhar Ahmad (author)
2019
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
| DOAJ | 2021
Performance and mechanism for cadmium and lead adsorption from water and soil by corn straw biochar
| Springer Verlag | 2017