Abstract
While new coagulants are able to remove more contaminants and reach higher removal efficiency, basic coagulation performance, such as turbidity removal and floc settling, is also considered in the process evaluation. Here, we systematically evaluated the performance of a novel covalently-bound hybrid coagulant (CBHyC) in natural surface water coagulation using jar test. Size-exclusion chromatography coupled with online organic carbon detection (SEC-DOC), fluorescence excitation emission matrix (EEM), acid-base titration and zeta potential analysis were used to characterize the behaviors of CBHyC coagulation. Compared with metal-based coagulants, CBHyC has better settling properties and removes more turbidity. Across a range of dosages, the CBHyC formulation with higher zeta potential achieved better removal of natural organic matter (NOM) and resulted in less of a pH change. Total dissolved nitrogen decreased 37% with CBHyC coagulation. CBHyC can remove both low molecular weight (LMW) organics and high molecular weight components. The interaction between quaternary ammonium plus phenolic and carboxylic groups is likely responsible for the removal of LMW and nitrogenous organics, and thus CBHyC removed more NOM than conventional coagulants. In summary, CBHyC performs better than conventional coagulants for removing turbidity and NOM and also overcomes emerging needs to remove LMW and nitrogenous organics.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 322-328 |
| Number of pages | 7 |
| Journal | Separation and Purification Technology |
| Volume | 192 |
| DOIs | |
| State | Published - Feb 9 2018 |
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Keywords
- Coagulation
- Dissolved organic nitrogen
- Natural organic matter
- Turbidity
- Water treatment
ASJC Scopus subject areas
- Analytical Chemistry
- Filtration and Separation
Cite this
Coagulation behaviors of new covalently bound hybrid coagulants (CBHyC) in surface water treatment. / Chen, Si; Yuan, Ziwen; Hanigan, David; Westerhoff, Paul; Zhao, Huazhang; Ni, Jinren.
In: Separation and Purification Technology, Vol. 192, 09.02.2018, p. 322-328.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Coagulation behaviors of new covalently bound hybrid coagulants (CBHyC) in surface water treatment
AU - Chen, Si
AU - Yuan, Ziwen
AU - Hanigan, David
AU - Westerhoff, Paul
AU - Zhao, Huazhang
AU - Ni, Jinren
PY - 2018/2/9
Y1 - 2018/2/9
N2 - While new coagulants are able to remove more contaminants and reach higher removal efficiency, basic coagulation performance, such as turbidity removal and floc settling, is also considered in the process evaluation. Here, we systematically evaluated the performance of a novel covalently-bound hybrid coagulant (CBHyC) in natural surface water coagulation using jar test. Size-exclusion chromatography coupled with online organic carbon detection (SEC-DOC), fluorescence excitation emission matrix (EEM), acid-base titration and zeta potential analysis were used to characterize the behaviors of CBHyC coagulation. Compared with metal-based coagulants, CBHyC has better settling properties and removes more turbidity. Across a range of dosages, the CBHyC formulation with higher zeta potential achieved better removal of natural organic matter (NOM) and resulted in less of a pH change. Total dissolved nitrogen decreased 37% with CBHyC coagulation. CBHyC can remove both low molecular weight (LMW) organics and high molecular weight components. The interaction between quaternary ammonium plus phenolic and carboxylic groups is likely responsible for the removal of LMW and nitrogenous organics, and thus CBHyC removed more NOM than conventional coagulants. In summary, CBHyC performs better than conventional coagulants for removing turbidity and NOM and also overcomes emerging needs to remove LMW and nitrogenous organics.
AB - While new coagulants are able to remove more contaminants and reach higher removal efficiency, basic coagulation performance, such as turbidity removal and floc settling, is also considered in the process evaluation. Here, we systematically evaluated the performance of a novel covalently-bound hybrid coagulant (CBHyC) in natural surface water coagulation using jar test. Size-exclusion chromatography coupled with online organic carbon detection (SEC-DOC), fluorescence excitation emission matrix (EEM), acid-base titration and zeta potential analysis were used to characterize the behaviors of CBHyC coagulation. Compared with metal-based coagulants, CBHyC has better settling properties and removes more turbidity. Across a range of dosages, the CBHyC formulation with higher zeta potential achieved better removal of natural organic matter (NOM) and resulted in less of a pH change. Total dissolved nitrogen decreased 37% with CBHyC coagulation. CBHyC can remove both low molecular weight (LMW) organics and high molecular weight components. The interaction between quaternary ammonium plus phenolic and carboxylic groups is likely responsible for the removal of LMW and nitrogenous organics, and thus CBHyC removed more NOM than conventional coagulants. In summary, CBHyC performs better than conventional coagulants for removing turbidity and NOM and also overcomes emerging needs to remove LMW and nitrogenous organics.
KW - Coagulation
KW - Dissolved organic nitrogen
KW - Natural organic matter
KW - Turbidity
KW - Water treatment
UR - http://www.scopus.com/inward/record.url?scp=85031938759&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85031938759&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2017.10.036
DO - 10.1016/j.seppur.2017.10.036
M3 - Article
VL - 192
SP - 322
EP - 328
JO - Separation and Purification Technology
JF - Separation and Purification Technology
SN - 1383-5866
ER -