Advanced oxidation processes: recent achievements and perspectives

The removal of five selected pesticide compounds in a brackish model groundwater solution was examined using a bench scale direct contact membrane distillation (DCMD) system. It was found that the rejection rate of the pesticides in DCMD is mainly influenced by its properties. Compounds with low hyd...

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Bibliographic Details
Published in:Environmental science and pollution research international 2020-06, Vol.27 (18), p.22141-22143
Main Authors: Vilar, Vítor J. P., Pillai, Suresh C., Poulios, Ioannis, Mantzavinos, Dionissios, Pintar, Albin
Format: Article
Language:English
Subjects:
Activated carbon
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Calcium
Calcium ions
Distillation
Earth and Environmental Science
Ecotoxicology
Editorial
Environment
Environmental Chemistry
Environmental Health
Environmental science
Groundwater
Humic acids
Hydrophobicity
Ions
Magnesium
Pesticides
Pressure
Rejection rate
Vapor pressure
Waste Water Technology
Water Management
Water Pollution Control
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Summary:The removal of five selected pesticide compounds in a brackish model groundwater solution was examined using a bench scale direct contact membrane distillation (DCMD) system. It was found that the rejection rate of the pesticides in DCMD is mainly influenced by its properties. Compounds with low hydrophobic characteristics and low vapour pressure showed a high rejection rate (70–99%), whereas compounds with a high vapour pressure or high hydrophobicity (LogD) showed a reduced rejection (30–50%) at a water recovery of 75%. The influence of groundwater feed solution contents such as the presence of organics (humic acid) and inorganic ions (Na+, Ca2+, Mg2+, Cl− and SO42−) as well as feed temperature (40, 55 and 70 °C) on the rejection of the pesticides in DCMD operation was also evaluated. The results showed that the presence of inorganic ions and organics in the feed solution influences the pesticides rejection in DCMD operation to a minor degree. In contrast, reduced rejection of pesticides with high vapour pressure was observed. A rapid small-scale column test (RSSCT) was carried out to study the removal of any remaining substances in the permeate by adsorption onto granular activated carbon (GAC). RSSCT showed promising performance of GAC as a post-treatment option.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-020-08929-4