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Graywater treatment of emerging pollutant linear alkylbenzene sulfonate by adsorption with leather shave waste activated carbon

  • Adsorption (and Catalysis or Photocatalysis) Applied to Environmental Protection
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Abstract

The purpose of this research is to evaluate the use of leather shave waste activated carbon (ACLW) as an alternative for the treatment of wastewater containing linear alkylbenzene sulfonate (LAS). Batch adsorption tests were carried out (pH effect, isotherms, kinetics). The activated carbon was tested for its life cycle by desorption with solvent and it was further evaluated as real wastewater treatment for bath graywater. Under the optimum pH of 2.5, kinetic studies showed a better correlation with the pseudo-second order model, with an activation energy of 27.5 kJ mol−1. Equilibrium isotherms correlated better with the double layer model, indicating hemi-micelle formation and performing a high-affinity isotherm. Adsorption was shown to be endothermic (∆H0 =  + 73.89 kJ mol−1), entropy driven (∆S0 =  + 0.46 kJ mol−1 K−1), and occurring spontaneously. The use of ethanol solution was effective for the regeneration of the adsorbent. Adsorption was applied in real wastewater, removing contaminants from bath graywater, especially anionic surfactants with up to 95% removal efficiency.

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Abbreviations

ACLW:

Activated carbon from leather shave waste

LAS:

Linear alkylbenzene sulfonate

pHPZC :

Point of zero charge

SDBS:

Sodium dodecyl benzene sulfonate

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Acknowledgements

The authors acknowledge the University of Passo Fundo for the scholarship and the National Council for Scientific and Technological Development (CNPQ) for the financial support to the research (Proc. 405311/2016–8).

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Henrique Baldi Faccenda: investigation, data curation, writing-original draft preparation, writing-reviewing; Flávia Melara: writing-original draft preparation; Gabriel Damini: investigation and validation; Marcelo Godinho: investigation; Christian Manera: investigation; Jeferson Steffanello Piccin: project administration, supervision, and writing-reviewing and editing.

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Correspondence to Jeferson Steffanello Piccin.

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The authors declare no competing interests.

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Responsible Editor: Tito Roberto Cadaval Jr

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Faccenda, H.B., Melara, F., Damini, G. et al. Graywater treatment of emerging pollutant linear alkylbenzene sulfonate by adsorption with leather shave waste activated carbon. Environ Sci Pollut Res 29, 79830–79840 (2022). https://doi.org/10.1007/s11356-021-17502-6

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  • DOI: https://doi.org/10.1007/s11356-021-17502-6

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