Title: Oil removal from produced water by agriculture waste adsorbents

Authors: Abdalrahman D. Alsulaili; Asmaa M. Fahim

Addresses: Civil Engineering Department, Kuwait University, P.O. Box 5969, Safat, 13060, Kuwait ' Green Chemistry Department, National Research Centre Dokki, P.O. Box 12622, Cairo, Egypt

Abstract: In this investigation, oil was removed from PW using adsorbents prepared from agriculture waste (date pits and walnut shells) packed in filter beds. Several parameters were examined, such as (contact time, oil content, TSS, conductivity, TDS, turbidity, and pH). The study showed that both the walnut shell and date pit achieved well. Furthermore, MB adsorption on the carbonised date pits and crushed Walnut shells with different concentrations were explored. The maximum adsorption capacities of oil content for walnut shell or date bits was 87%, 80%; respectively. The oil adsorption was confirmed through three models: Freundlich, Langmuir and Redlich-Peterson models. The Redlich-Peterson equation was more applicable for Date pits and Walnut shells rather than the Freundlich or Langmuir equation. Whereas its correlation coefficients showed high R2 = 0.9998 and 0.9917; respectively. In addition, Freundlich model was more applicable for Walnut shells rather than Date pits because its R2 = 0.9507 for walnut shells.

Keywords: oil produced water; OPW; agriculture waste; Langmuir; Freundlich; Redlich-Peterson; adsorption thermodynamics.

DOI: 10.1504/IJEWM.2020.104345

International Journal of Environment and Waste Management, 2020 Vol.25 No.1, pp.12 - 31

Received: 17 Sep 2018
Accepted: 29 Dec 2018

Published online: 26 Dec 2019 *

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