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Prospective chemisorption of fluoride utilizing coastal molluscan (Crassostrea Sp.) shell from phosphatic fertilizer pond wastewater, Paradeep, Odisha

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Title Prospective chemisorption of fluoride utilizing coastal molluscan (Crassostrea Sp.) shell from phosphatic fertilizer pond wastewater, Paradeep, Odisha
 
Creator Ray, Arati
Kumar, Manish
Dhal, N K
Hariprasad, D
 
Subject Chemisorption
Fertilizer industry
Fluorapatite
Fluoride
Molluscan shell
Pond wastewater
 
Description 496-502
The present study explores the utilization of very acidic (pH 1.46) and high fluoride (F-) containing (9290 ppm) phosphatic fertilizer industry (Paradeep, Odisha, India) pond wastewater (PW) generated from phosphogypsum (PG) stacks by using Crassostrea Sp. molluscan shell (MS) as an adsorbent. F- chemisorption batch experiments on molluscan shells (MS) powder (212 - 500 micron) varying 6 different MS (Solid-S) to PW (Liquid-L) i.e. S/L ratios (1: 8 to 1: 30), time (0.08 to 48 hours) and fluoride concentration (4645 – 8361 ppm) as diluted PW. Chemisorption of F- peaked with 1: 20 S/L ratio at 24 hrs and its concentration in the supernatant reduced by 99.9 %. XRF, FTIR and XRD analysis of MS and its chemisorbed residues confirmes the role of relatively high calcium containing MS (72 % CaO) towards formation of Fluorapatite (FA) [Ca5(PO4)3F]. Desorption experiments of FA residue for 24 hrs, highlights the stability of F- chemisorption process on MS, which is confirmed by presence of FA in desorbed residue through XRD analysis. The research findings establish prospects of F- recovery from PW through chemisorption process utilizing selected MS.
 
Date 2021-02-02T07:14:57Z
2021-02-02T07:14:57Z
2020-11
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscair.res.in/handle/123456789/56075
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJCT Vol.27(6) [November 2020]