Encapsulated green magnetic nanoparticles for the removal of toxic Pb2+ and Cd2+ from water: Development, characterization and application

Download

index.pdf

Date

2019-03-15

Author

Ali, Imran
Peng, Changsheng
Lin, Dichu
Saroj, Devendra P.
Naz, Iffat
Khan, Zahid M.
Sultan, Muhammad
Ali, Mohsin

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

173
views

0
downloads

Current research is based on an innovative approach of the fabrication of encapsulated sustainable, green, phytogenic magnetic nanoparticles (PMNPs), to inhibit the generation of secondary pollutants (Iron/Fe degrees) during water treatment applications. These novel bio-magnetic membrane capsules (BMMCs) were prepared using twostep titration gel crosslink method, with polyvinyl alcohol and sodium alginate matrix as the model encapsulating materials to eliminate potentially toxic metals (Pb2+ and Cd2+) from water. The development of BMMCs was characterized by FTIR, XRD, XPS, SEM, VSM, TGA and EDX techniques. The effects of various operating parameters, adsorbent dose, contact time, solution pH, temperature, initial concentration of metals cations and co-existing ions were studied. The hysteresis loops have illustrated an excellent super-paramagnetic nature, demonstrating the smooth encapsulation of PMNPs without losing their magnetic properties. The maximum monolayer adsorptive capacities estimated at pH 6.5 by the Langmuir isotherm model were 548 and 610.67 mg/g for Pb2+ and Cd2+, respectively. The novel BMMCs did not only control oxidation of PMNPs but also sustained the adsorptive removal over a wide range of pH (3-8), and the electrostatic interaction and ion-exchange were the core adsorption mechanisms. The BMMCs could easily be regenerated using 25% HNO3 as an eluent for successful usage in seven repeated cycles. Therefore, the BMMCs as a material can be used as an excellent sorbent or composite material to remove toxic metals Pb2+ and Cd2+, showing strong potential for improving water and wastewater treatment technologies.

Subject Keywords

Environmental Engineering, Waste Management and Disposal, Management, Monitoring, Policy and Law, General Medicine

URI

https://hdl.handle.net/11511/68469

Journal

JOURNAL OF ENVIRONMENTAL MANAGEMENT

DOI

https://doi.org/10.1016/j.jenvman.2018.12.112

Collections

Department of Environmental Engineering, Article

Suggestions

OpenMETU
Core

Bacterial application increased the flow rate of CaCO3-clogged emitters of drip irrigation system Eroğlu, Seçkin; Tunc, Talip; Sahin, Fikrettin (Elsevier BV, 2012-05-01) CaCO3 is one of the most common emitter clogging factors among chemical precipitates in drip irrigation systems. Continuous acid application as a classical approach to prevent CaCO3 clogging can be tricky, expensive and hazardous for soil. In order to develop an environmentally friendly method to address the problem, two bacterial strains, one renowned as a PGPR and the other having extensive CaCO3 dissolving capacity, were used in treatments of artificially clogged drip irrigation emitters. Results showed ...
A new screening index for pesticides leachability to groundwater DEMİR, A. Ece Akay; Dilek, Filiz Bengü; Yetiş, Ülkü (Elsevier BV, 2019-02-01) Given the fact that pesticides exist in the aquatic environment at very low concentrations, it is clear that their analysis require expensive analytical techniques. Water authorities in Turkey are in need of assessing the likelihood of pesticide occurrence in groundwater in order to identify minimum number of pesticides that would be included in monitoring programs. To this purpose, the pesticides used in Turkey are ranked and those having higher leaching potentials are identified using pesticide screening ...
Demonstration and optimization of sequential microaerobic dark- and photo-fermentation biohydrogen production by immobilized Rhodobacter capsulatus JP91 Sağır, Emrah; Yucel, Meral; Hallenbeck, Patrick C. (Elsevier BV, 2018-02-01) Hydrogen generation from complex substrates composed of simple sugars has the potential to mitigate future worldwide energy demand. The biohydrogen potential of a sequential microaerobic dark- and photo-fermentative system was investigated using immobilized Rhodobacter capsulatus JP91. Biological hydrogen production from glucose was carried out using a batch process and a bench-scale bioreactor. Response surface methodology with a Box-Behnken design was employed to optimize key parameters such as inoculum c...
A Laboratory Column Investigation for the Treatment of Cr(VI) with Zero-Valent Iron Uyusur, Burcu; Ünlü, Kahraman (Mary Ann Liebert Inc, 2009-02-01) Permeable reactive barrier (PRB) technology is commonly placed in the list of options for groundwater remediation at hazardous waste sites, where Cr(VI) treatment in groundwater has been a concern more than any other inorganic contaminants. The objective of this study was to investigate the effectiveness and longevity of Cr(VI) removal with zero-valent iron based PRBs. The main focus was on two parameters affecting the performance of Cr(VI) removal with PRBs: (1) amount of reactive media and (2) groundwater...
Diversity and community analysis of ammonia oxidizing bacteria in a streambed surrounding an artificial dam Murdoch, Robert Waller; Staniec, Andria Costello (Elsevier BV, 2013-09-30) The degree to which small natural dams affect the native bacterial nitrogen cycling community was explored by molecular methods. The identities and relative abundances of ammonia oxidizing bacteria in the sediment surrounding an artificial dam both at the surface and in the hyporheic zone were characterized. Analyses were performed using tRFLP of the conserved amoA gene using a semi-nested degenerate PCR approach. Additionally, an amoA gene library was constructed to characterize the most dominant sediment ...

Citation Formats

I. Ali et al., “Encapsulated green magnetic nanoparticles for the removal of toxic Pb2+ and Cd2+ from water: Development, characterization and application,” JOURNAL OF ENVIRONMENTAL MANAGEMENT, pp. 273–289, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68469.