Flocculation of <i>Microcystis aeruginosa</i> Using Modified Larch Tannin

Wang, Li; Liang, Wenyan; Yu, Jian; Liang, Zhixia; Ruan, Lingling; Zhang, Yuanchun

doi:10.1021/es400793x

Cited by 88 publications

(31 citation statements)

References 40 publications

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“…For doses greater than 80 mg/L of modified tannin, recovery efficiencies were greater than 80%, with pH ranging from 7 to 10. Similar results were obtained to remove Microcystis aeruginosa cultured in BG-11, using a modified tannin coagulant (Q-TN) 28 . Recovery efficiencies obtained were greater than 90% in a pH range from 6 to 9 28 .…”

Section: Resultssupporting

confidence: 73%

Harvesting Microalgal Biomass grown in Anaerobic Sewage Treatment Effluent by the Coagulation-Flocculation Method: Effect of pH

Cassini

Francisco

Antunes

et al. 2017

Braz. arch. biol. technol.

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Section: Resultssupporting

confidence: 73%

Harvesting Microalgal Biomass grown in Anaerobic Sewage Treatment Effluent by the Coagulation-Flocculation Method: Effect of pH

Cassini

Francisco

Antunes

et al. 2017

Braz. arch. biol. technol.

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“…2). This was probably because of the more generation of extracellular organic matter (EOM) in the stationary phase which attached to the algal cells and changed the surface properties (Wang et al, 2013).…”

Section: Algae Removal In Different Growth Phasesmentioning

confidence: 99%

“…EOM in an appropriate concentration acted as flocculation aid to increase the removal efficiency (Henderson et al, 2008a), however, the increased EOM might increase the magnitude of ZP and thus inhibited the flocculation process (Wang et al, 2013). Compared to some coagulants with a Fig.…”

Section: Algae Removal In Different Growth Phasesmentioning

confidence: 99%

Influence of zeta potential on the flocculation of cyanobacteria cells using chitosan modified soil

Zhang

Pan

2015

Journal of Environmental Sciences

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Using chitosan modified soil to flocculate and sediment algal cells has been considered as a promising strategy to combat cyanobacteria blooms in natural waters. However, the flocculation efficiency often varies with algal cells with different zeta potential (ZP) attributed to different growth phases or water conditions. This article investigated the relationship between ZP of Microcystis aeruginosa and its influence to the flocculation efficiency using chitosan modified soil. Results suggested that the optimal removal efficiency was obtained when the ZP was between − 20.7 and − 6.7 mV with a removal efficiency of more than 80% in 30 min and large floc size of > 350 μm. When the algal cells were more negatively charged than − 20.7 mV, the effect of chitosan modified soil was depressed (< 60%) due to the insufficient charge density of chitosan to neutralize and destabilize the algal suspension. When the algal cells were less negative than − 6.7 mV or even positively charged, a small floc size (< 120 μm) was formed, which may be difficult to sink under natural water conditions. Therefore, manipulation of ZP provided a viable tool to improve the flocculation efficiency of chitosan modified soil and an important guidance for practical engineering of cyanobacteria bloom control.

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“…Cyanobacterial blooms often elevate water pH and sometimes increase the pH as high as 9.5 (Wang et al, 2013). Since quaternary amine on the polymer does not easily dissociate as pH changes (Wang et al, 2011a), the surface charge of CS modified soil was stable in the pH range from 2.0 to 10.0 (Fig.…”

Section: Floc Stabilitymentioning

confidence: 99%

Removal of Microcystis aeruginosa using cationic starch modified soils

et al. 2016

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a b s t r a c tA cheap and biodegradable modifier, cationic starch (CS), was used to turn local soils into effective flocculants for Microcystis aeruginosa (M. aeruginosa) removal. The isoelectric point of soil particles was remarkably increased from pH 0.5 to 11.8 after modification with CS, which made CS modified soil particles positively charged and obtain algal flocculation ability. At the soil concentration of 100 mg/L, when the CS modifier was 10 mg/L, 86% of M. aeruginosa cells were removed within 30 min. Lower or higher CS dosage led to limited algal removal. About 71% and 45% of M. aeruginosa cells were removed within 30 min when CS was 5 mg/L and 80 mg/L, respectively. This is because only part of algal cells combined with CS modified soil particles through charge neutralization at low dosage, while flocs formed at high CS dosage were positively charged which prevents further aggregation among the flocs. The floc stability was quantified by a floc breakage index under applied shear force. Algal flocs formed at acid and alkaline conditions were more prone to be broken than those at the neutral condition. The cost and biodegradability concerns may be largely reduced through the use of CS modified local soils. For field applications, other practical issues (e.g., re-suspension) should be further studied by jointly using other methods.

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Flocculation of Microcystis aeruginosa Using Modified Larch Tannin

Cited by 88 publications

References 40 publications

Harvesting Microalgal Biomass grown in Anaerobic Sewage Treatment Effluent by the Coagulation-Flocculation Method: Effect of pH

Harvesting Microalgal Biomass grown in Anaerobic Sewage Treatment Effluent by the Coagulation-Flocculation Method: Effect of pH

Influence of zeta potential on the flocculation of cyanobacteria cells using chitosan modified soil

Removal of Microcystis aeruginosa using cationic starch modified soils

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