In-Situ Groundwater Treatment Technology Using Biodegradation

1987 ◽  
Author(s):  
Edward J. Bouwer ◽  
Gordon D. Cobb
Keyword(s):  
Groundwater Treatment ◽  
Treatment Technology

Sulfur-anchored palm shell waste-based activated carbon for ultrahigh sorption of Hg(II) for in-situ groundwater treatment

2021 ◽  
pp. 125995
Author(s):  
So Yeon Yoon ◽  
Seok Byum Jang ◽  
Kien Tiek Wong ◽  
Hyeseong Kim ◽  
Min Ji Kim ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Groundwater Treatment ◽  
Palm Shell ◽  
Shell Waste

scholarly journals Effects of Persulfate Activation with Pyrite and Zero-Valent Iron for Phthalate Acid Ester Degradation

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 354
Author(s):  
Muhammad A. Imran ◽  
Yuzhen Tong ◽  
Qing Hu ◽  
Mingzhu Liu ◽  
Honghan Chen
Keyword(s):  
Zero Valent Iron ◽  
Pyrite Surface ◽  
Groundwater Treatment ◽  
Oxidation Reduction ◽  
Organic Carbon Concentration ◽  
Oxidation Reduction Potential ◽  
Persulfate Activation ◽  
Surface Morphologies ◽  
Ethylhexyl Phthalate

Phthalic acid esters (PAEs) are often detected in remediated groundwater using appropriate oxidant materials by in situ groundwater treatment. The study compares zero-valent iron–persulfate with a pyrite–persulfate system to degrade three PAEs—di(2-ethylhexyl) phthalate (DEHP), dibutyl phthalate (DBP), and dimethyl phthalate (DMP). Column experiments were conducted, and rapid oxidation occurred in a pyrite–persulfate system due to sulfate radical generation. DMP concentration was found at about 60.0% and 53.0% with zero-valent iron (ZVI) and pyrite activation of persulfate, respectively. DBP concentration was measured as 25.0–17.2% and 23.2–16.0% using ZVI–persulfate and pyrite–persulfate systems, respectively. However, DEHP was not detected. The total organic carbon concentration lagged behind the Ʃ3 PAEs. Persulfate consumption with ZVI activation was half of the consumption with pyrite activation. Both systems showed a steady release of iron ions. Overall, the oxidation–reduction potential was higher with pyrite activation. The surface morphologies of ZVI and pyrite were investigated using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and XPS. Intensive corrosion occurs on the pyrite surface, whereas the ZVI surface is covered by a netting of iron oxides. The pyrite surface showed more oxidation and less passivation in comparison with ZVI, which results in more availability of Fe 2 + for persulfate activation. The pyrite–persulfate system is relatively preferred for rapid PAE degradation for contamination.

In situ electrochemical and photo-electrochemical generation of the fenton reagent: A potentially important new water treatment technology

2006 ◽  
Vol 40 (9) ◽  
pp. 1754-1762 ◽  
Author(s):  
J.M. Peralta-Hernández ◽  
Yunny Meas-Vong ◽  
Francisco J. Rodríguez ◽  
Thomas W. Chapman ◽  
Manuel I. Maldonado ◽  
...  
Keyword(s):  
Water Treatment ◽  
Fenton Reagent ◽  
Treatment Technology ◽  
Electrochemical Generation ◽  
Water Treatment Technology

In situ treatment technology

1997 ◽  
Vol 34 (07) ◽  
pp. 34-3884-34-3884
Keyword(s):  
Treatment Technology

A contribution to solve the arsenic problem in groundwater of Ganges Delta by in-situ treatment

2008 ◽  
Vol 58 (10) ◽  
pp. 2009-2015 ◽  
Author(s):  
U. Rott ◽  
H. Kauffmann
Keyword(s):  
Arsenic Removal ◽  
Low Cost ◽  
Treatment Plant ◽  
Cost Effective ◽  
Treatment Technology ◽  
Manganese Removal ◽  
Arsenic In Groundwater ◽  
Cost Effective Treatment ◽  
Removal Of Arsenic

Arsenic in groundwater is a huge problem in numerous regions of the world. Many people are exposed to high arsenic concentrations and consequently risk getting ill or even die as a result of arsenic poisoning. There are several efficient technologies for the removal of arsenic but often these methods have disadvantages, e.g. high costs for installation and/or operation, the need for chemicals or the production of arsenic contaminated filter sludge. These disadvantages can make the application difficult, especially in poor regions. Under suitable ancillary conditions the subterranean (in-situ) treatment, which is often used for iron and manganese removal from groundwater, can also be applied for the removal of arsenic and can be a cost-effective treatment technology. A field trial was carried out with a low-cost in-situ treatment plant in West Bengal/India which is described in this paper, in order to investigate whether this treatment technology is also applicable under the boundary conditions there. As for the in-situ treatment technology besides oxygen no additives are required and no arsenic contaminated filter sludge is produced this technology could be a suitable method for arsenic removal especially in poor regions.

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