Removal of Fluoride Ions from Wastewater Using Green and Blue-green Algae Biomass in a Fluidized Bed System

Shahlaa Esmail Ebrahim

doi:10.31026/j.eng.2016.02.08

Article Details

Removal of Fluoride Ions from Wastewater Using Green and Blue-green Algae Biomass in a Fluidized Bed System

Authors:

Shahlaa Esmail Ebrahim

Publisher:

University of Baghdad

Journal:

Journal of Engineering Vol.22 Issue 2, pp.111-127

Document Type:

Article

Publication Date:

1/2016

Document Language:

English

Document ID (Org No.):

2001381031

pISSN:

2520-3339

DOI:

10.31026/j.eng.2016.02.08

Keywords:

Abstract:

 The removal of fluoride ions from aqueous solution onto algal biomass as biosorbent in batch and continuous fluidized bed systems was studied. Batch system was used to study the effects of process parameters such as, pH (2-3.5), influent fluoride ions concentration (10- 50 mg/l), algal biomass dose (0–1.5 g/ 200 ml solution), to determine the best operating conditions. These conditions were pH=2.5, influent fluoride ions concentration= 10 mg/l, and algal biomass dose=3.5 mg/l. While, in continuous fluidized bed system, different operating conditions were used; flow rate (0.667- 0.800 l/min), bed depth (8-15 cm) corresponded to bed weight of (80- 150 g). The results show that the breakthrough time increases with the increase of bed depth but decreases with the increase of flow rate. Thomas and Yoon-Nelson models were used to analyze the experimental data and there was a good matching between the theoretical and the experimental data for both models. Desorption studies indicate that NaOH solutions at different pH values (8-10) were used to recover the fluoride ions sorbed onto the algal biomass. It is noteworthy that the desorption efficiency at pH =10 remains close to 95 % of the initial value of sorption capacity. So the desorption performance remains appreciable.

Article Details

Removal of Fluoride Ions from Wastewater Using Green and Blue-green Algae Biomass in a Fluidized Bed System

Authors:

Shahlaa Esmail Ebrahim

Publisher:

University of Baghdad

Journal:

Journal of Engineering Vol.22 Issue 2, pp.111-127

Document Type:

Article

Publication Date:

1/2016

Document Language:

English

Document ID (Org No.):

2001381031

pISSN:

2520-3339

DOI:

10.31026/j.eng.2016.02.08

Fluoride ions Fluidized bed

algal biomass

Thomas and Yoon-Nelson models

Issues

Article Details

Removal of Fluoride Ions from Wastewater Using Green and Blue-green Algae Biomass in a Fluidized Bed System

Authors: Shahlaa Esmail Ebrahim

Publisher: University of Baghdad

Journal: Journal of Engineering Vol.22 Issue 2, pp.111-127

Document Type: Article

Publication Date: 1/2016

Document Language: English

Document ID (Org No.): 2001381031

pISSN: 2520-3339

DOI: 10.31026/j.eng.2016.02.08

Fluoride ions Fluidized bed

algal biomass

Thomas and Yoon-Nelson models

Issues

Authors:

Shahlaa Esmail Ebrahim

Publisher:

University of Baghdad

Journal:

Journal of Engineering Vol.22 Issue 2, pp.111-127

Document Type:

Article

Publication Date:

1/2016

Document Language:

English

Document ID (Org No.):

2001381031

pISSN:

2520-3339

DOI:

10.31026/j.eng.2016.02.08