-
Tytuł:
-
Iron turning waste: Low cost and sustainable permeable reactive barrier media for remediating dieldrin, endrin, DDT and lindane in groundwater.
-
Autorzy:
-
Abbas T; Department of Civil and Environmental Engineering, North Dakota State University, Fargo, ND, 58108-6050, USA; Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, Las Vegas, NV, USA, 89154-4015. Electronic address: .
Wadhawan T; Dynamita, Hamilton, ON, Canada. Electronic address: .
Khan A; Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan. Electronic address: .
McEvoy J; Department of Microbiological Sciences, North Dakota State University, Fargo, ND, 58108-6050, USA. Electronic address: .
Khan E; Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, Las Vegas, NV, USA, 89154-4015. Electronic address: .
-
Źródło:
-
Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2021 Nov 15; Vol. 289, pp. 117825. Date of Electronic Publication: 2021 Jul 24.
-
Typ publikacji:
-
Journal Article
-
Język:
-
English
-
Imprint Name(s):
-
Original Publication: Barking, Essex, England : Elsevier Applied Science Publishers, c1987-
-
MeSH Terms:
-
Groundwater*
Water Pollutants, Chemical*/analysis
DDT ; Dieldrin ; Endrin ; Hexachlorocyclohexane/analysis ; Iron
-
Contributed Indexing:
-
Keywords: Chlorinated pesticides; Degradation by-products; Degradation pathways; Groundwater remediation; Iron turning waste
-
Substance Nomenclature:
-
0 (Water Pollutants, Chemical)
59NEE7PCAB (Hexachlorocyclohexane)
CIW5S16655 (DDT)
E1UOL152H7 (Iron)
I0246D2ZS0 (Dieldrin)
OB9NVE7YCL (Endrin)
-
Entry Date(s):
-
Date Created: 20210730 Date Completed: 20210929 Latest Revision: 20210929
-
Update Code:
-
20240105
-
DOI:
-
10.1016/j.envpol.2021.117825
-
PMID:
-
34330012
-
The feasibility and effectiveness of iron turning waste as low cost and sustainable permeable reactive barrier (PRB) media for remediating dieldrin, endrin, dichlorodiphenyltrichloroethane (DDT), and lindane individually (batch system) and combined (continuous flow column) in water were investigated. After 10 min of reaction in a batch system, removal of endrin, dieldrin, and DDT was higher (86-91 %) than lindane (41 %) using 1 g of iron turning waste in 200 mL of pesticide solution (20 μg/L for each pesticide). Among the studied pesticides, only lindane removal decreased substantially in the presence of nitrate (37 %) and magnesium (18 %). Acidic water environment (pH = 4) favored the pesticide removal than neutral and basic environments. For the column experiments, sand alone as PRB media was ineffective for remediating the pesticides in water. When only iron turning was used, the removal efficiencies of lindane, endrin, and dieldrin were 83-88 % and remained stable during 60 min of the experiments. DDT removal was less than other pesticides (58 %). Sandwiching the iron turning waste media between two sand layers improved DDT removal (79 %) as well as limited the iron content below a permissible level in product water. In a long-term PRB column performance evaluation, iron turning waste (150 g) removed all pesticides in water (initial concentration of each pesticide = 2 μg/L) effectively (≥94 %) at a hydraulic retention time of 1.6 h. Iron turning waste, which was mainly in the form of zerovalent iron (Fe 0 ), was oxidized to ferrous (Fe 2+ ) and ferric (Fe 3+ ) iron during its reaction with pesticides, and electrons donated by Fe 0 and Fe 2+ were responsible for complete dechlorination of all the pesticides. Therefore, it can be used as inexpensive and sustainable PRB media for groundwater remediation especially in developing countries where groundwater contamination with pesticides is more prevalent.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
