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Article

Temperature Impact on Reverse Osmosis Permeate Flux in the Remediation of Hexavalent Chromium

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Department of Chemical Engineering, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia
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Department of Mechanical Engineering, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia
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Department of Chemistry, College of Science, King Khalid University, Abha 61421, Saudi Arabia
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School of Allied Health Science, Faculty of Health and Life Sciences, De Montfort University, The Gateway, Leicester LE1 9BH, UK
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Author to whom correspondence should be addressed.
Academic Editors: Mejdi Jeguirim and Salah Jellali
Water 2022, 14(1), 44; https://doi.org/10.3390/w14010044
Received: 16 November 2021 / Revised: 19 December 2021 / Accepted: 20 December 2021 / Published: 24 December 2021
(This article belongs to the Special Issue Wastewater Treatment, Valorization and Reuse II)
Reverse osmosis technique was applied in removing hexavalent chromium ions from artificial wastewater. Different operating conditions were studied to monitor the separation process using commercial Reverse Osmosis BW30XFR membrane. Different concentrations of hexavalent chromium; 5, 30, and 100 ppm were tested. Samples were subjected to incrementally increasing operating pressure; 10, 30, and 45 bar and flow rates; 2.2, 3.4, and 4.5 L/min under various temperatures; 25, 35, 45, and 55 °C. Collected permeate and concentrations were measured after each experiment using a UV spectrophotometer. Results obtained presented a higher rejection percentage at lower feed concentrations with a value up to 99.8% for 5 ppm in comparison to 94.3% for 30 ppm and 77.2% for 100 ppm concentration due to concentration polarization; however, it showed no effect of increasing operating flow rates. Moreover, the increase in feed temperature from 25 to 55 °C had positively increased permeate flux to more than 300 times. The permeate flux at 25 °C is recorded for all tested samples in the range of 30 to 158 kg/h·m2, this range has risen at 55 °C under the same conditions to the range of 70 to 226 kg/h·m2, indicating alteration within the membrane pore size due to temperature increase and high applied pressure concluding high sensitivity of polymeric membranes towards changing permeate flow rate with increasing temperatures. View Full-Text
Keywords: reverse osmosis; chromium (VI) removal; membrane polarization; temperature effects; permeate flux reverse osmosis; chromium (VI) removal; membrane polarization; temperature effects; permeate flux
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MDPI and ACS Style

Shigidi, I.; Anqi, A.E.; Elkhaleefa, A.; Mohamed, A.; Ali, I.H.; Brima, E.I. Temperature Impact on Reverse Osmosis Permeate Flux in the Remediation of Hexavalent Chromium. Water 2022, 14, 44. https://doi.org/10.3390/w14010044

AMA Style

Shigidi I, Anqi AE, Elkhaleefa A, Mohamed A, Ali IH, Brima EI. Temperature Impact on Reverse Osmosis Permeate Flux in the Remediation of Hexavalent Chromium. Water. 2022; 14(1):44. https://doi.org/10.3390/w14010044

Chicago/Turabian Style

Shigidi, Ihab, Ali E. Anqi, Abubakar Elkhaleefa, Azam Mohamed, Ismat H. Ali, and Eid I. Brima. 2022. "Temperature Impact on Reverse Osmosis Permeate Flux in the Remediation of Hexavalent Chromium" Water 14, no. 1: 44. https://doi.org/10.3390/w14010044

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