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פותח על ידי קלירמאש פתרונות בע"מ -
Using dissolved humic acid to remove hydrophobic contaminants from water by complexation - Flocculation process
Year:
1998
Authors :
לאור, יעל
;
.
Volume :
32
Co-Authors:
Rebhun, M., Technion, Fac. Civ. Eng., Environ./Water R., Haifa 32000, Israel
Meir, S., Technion, Fac. Civ. Eng., Environ./Water R., Haifa 32000, Israel
Laor, Y., Technion, Fac. Civ. Eng., Environ./Water R., Haifa 32000, Israel
Facilitators :
From page:
981
To page:
986
(
Total pages:
6
)
Abstract:
Dissolved humic acid (DHA) can be used as a complexing agent to remove hydrophobic contaminants from water by complexation-flocculation process. The treatment process is composed of two stages: (a) DHA is added to the contaminated water and allowed to interact (bind) with the dissolved contaminants to form DHA-contaminant complexes (complexation stage). (b) A flocculant (alum or ferric chloride) is added, resulting in precipitation and flocculation of the DHA and the associated contaminant (flocculation stage). Flocculation of DHA at concentrations of 1-50 mg/L OC(HA) was highly efficient with both alum and ferric chloride. The removal of three polycyclic aromatic hydrocarbons (PAHs) was studied using this process. DHA-PAH complexes did not disintegrate upon addition of AI(III) or Fe(III) salts, they were efficiently removed by flocculation, and the experimental results corresponded to those predicted by computations of the bound fractions. The proposed process is effective in removing pollutants of medium to high hydrophobicity (log K(ow) > 4.5). It is simple, does not require special treatment facilities, can be coupled with common water treatment technology, and has a potential to be useful in cases of periodic contamination events. Additionally, the efficient removal of DHA-contaminant complexes by flocculation emphasizes the importance of enhanced coagulation, not only to reduce the formation of disinfection byproducts (DBPs), but also to remove organic micropollutants associated with dissolved organic matter.Dissolved humic acid (DHV) can be used as a complexing agent to remove hydrophobic contaminants from water by complexation-flocculation process. An application to the removal of polycyclic aromatic hydrocarbons (PAH) show that the process is effective in removing pollutants of medium to high hydrophobicity. DHA-PAH complexes did not disintegrate upon addition of Al(III) or Fe(III) salts and they were effectively removed by flocculation.
Note:
Related Files :
acid medium
aluminum potassium sulfate
Decontamination
Hydrophobicity
Pollution Control
water pollutant
עוד תגיות
תוכן קשור
More details
DOI :
10.1021/es9707163
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
24223
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:05
Scientific Publication
Using dissolved humic acid to remove hydrophobic contaminants from water by complexation - Flocculation process
32
Rebhun, M., Technion, Fac. Civ. Eng., Environ./Water R., Haifa 32000, Israel
Meir, S., Technion, Fac. Civ. Eng., Environ./Water R., Haifa 32000, Israel
Laor, Y., Technion, Fac. Civ. Eng., Environ./Water R., Haifa 32000, Israel
Using dissolved humic acid to remove hydrophobic contaminants from water by complexation - Flocculation process
Dissolved humic acid (DHA) can be used as a complexing agent to remove hydrophobic contaminants from water by complexation-flocculation process. The treatment process is composed of two stages: (a) DHA is added to the contaminated water and allowed to interact (bind) with the dissolved contaminants to form DHA-contaminant complexes (complexation stage). (b) A flocculant (alum or ferric chloride) is added, resulting in precipitation and flocculation of the DHA and the associated contaminant (flocculation stage). Flocculation of DHA at concentrations of 1-50 mg/L OC(HA) was highly efficient with both alum and ferric chloride. The removal of three polycyclic aromatic hydrocarbons (PAHs) was studied using this process. DHA-PAH complexes did not disintegrate upon addition of AI(III) or Fe(III) salts, they were efficiently removed by flocculation, and the experimental results corresponded to those predicted by computations of the bound fractions. The proposed process is effective in removing pollutants of medium to high hydrophobicity (log K(ow) > 4.5). It is simple, does not require special treatment facilities, can be coupled with common water treatment technology, and has a potential to be useful in cases of periodic contamination events. Additionally, the efficient removal of DHA-contaminant complexes by flocculation emphasizes the importance of enhanced coagulation, not only to reduce the formation of disinfection byproducts (DBPs), but also to remove organic micropollutants associated with dissolved organic matter.Dissolved humic acid (DHV) can be used as a complexing agent to remove hydrophobic contaminants from water by complexation-flocculation process. An application to the removal of polycyclic aromatic hydrocarbons (PAH) show that the process is effective in removing pollutants of medium to high hydrophobicity. DHA-PAH complexes did not disintegrate upon addition of Al(III) or Fe(III) salts and they were effectively removed by flocculation.
Scientific Publication
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