- Title
- Organically functionalized bentonite for the removal of perfluorooctane sulfonate, phenanthrene and copper mixtures from wastewater
- Creator
- Khodabakhshloo, Nafise; Biswas, Bhabananda; Moore, Farid; Du, Jianhua; Naidu, Ravi
- Relation
- Applied Clay Science Vol. 200, Issue January 2021, no. 105883
- Publisher Link
- http://dx.doi.org/10.1016/j.clay.2020.105883
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2021
- Description
- The co-occurrence of a wide range of hydrophobic and hydrophilic contaminants with contrasting physico-chemical properties in wastewaters makes practical remediation a challenge. Applications of ion exchangers such as clays are an environmentally friendly option in a cleanup strategy. However, clays often require chemical functionalization to adsorb non-polar contaminants. In this study, the most readily available low-cost Iranian bentonite was modified with Arquad® 2HT-75 (IBA) and further tailored with palmitic acid (IBAP) in order to prepare effective adsorbents. They were used for the removal of perfluorooctane sulfonate (PFOS), phenanthrene (PHE) and copper ions (Cu2+) both in single (S) and binary (B) contaminant conditions in simulated and real wastewater. The IB showed a large affinity for Cu2+ in both single (qmax: 43.43 mg/L) and binary (qmax: 43.95 mg/L) systems. Adsorption of PFOS and PHE was dramatically enhanced by the functionalized clays IBA (KF (PFOS): 11.1 and KF (PHE): 9.65 mg (1-n) Ln g−1) and IBAP (KF (PFOS)): 10.2 and KF (PHE): 16.68 mg (1-n) Ln g−1). The co-occurrence of PFOS or PHE with Cu2+ enhanced their adsorption onto clays indicating that Cu2+ can form bridges between clays and PFOS or PHE in different mechanism to increase adsorption of PFOS or PHE in binary solutions. The surface-tailored organoclay IBAP showed great potential for the complete removal of PFOS, PHE and 86.6% of Cu2+ from real wastewater, which is usually considered challenging.
- Subject
- bentonite; organoclays; mixed contamination; adsorption; PFOS; wastewater; SDG 6; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1434590
- Identifier
- uon:39466
- Identifier
- ISSN:0169-1317
- Language
- eng
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