Effect of phosphate on removal of humic substances by aluminum sulfate coagulant

Cheng, Wen Po; Hwa, Fung; Yu, Ruey-Fang

doi:10.1016/j.jcis.2003.08.074

Cited by 48 publications

(29 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…De Vicente et al (2008b) found that HA and silicate decreased PO 4 . However, de Vicente et al (2008b) cautioned that some of the PO −3 4 removal observed in their study may have been due to formation Al-PO −3 4 -HA complexes versus sorption onto Al(OH) 3 , although this reaction predominately occurs under conditions of low pH (<4; Cheng et al 2004). More experimental research is needed to better understand mechanisms affecting redox-P binding efficiency for natural sediments.…”

Section: Lake-wide Al Dosage Considerationsmentioning

confidence: 91%

“…The precipitate only occurred for sediments with added Al, rendering absorbance determination at 880 nm on a spectrophotometer untenable. Because sediment organic matter content was high (∼25%), this reaction was believed to be the outcome of coprecipitation between organic acids and Al at low pH (Cheng et al 2004). Nonetheless, others have shown that the mass of redox-P removed is equivalent to the mass of Al-P formed (Rydin and Welch 1999, James 2005, Pilgrim et al 2007).…”

Section: Alum Assaysmentioning

confidence: 99%

“…However, nearly all points fell outside the 95% confidence limits developed for Half Moon Lake, indicating that individual lake sediments should be examined to accurately estimate relationships between redox-P and Al:P ratios. Other factors such as HA and silicate concentration (Guan et al 2006, de Vicente et al 2008b, pH (Cheng et al 2004), and changes in the crystalline structure of Al(OH) 3 over time (Lijklema 1980, Berkowitz et al 2006, de Vicente et al 2008a can affect the Al:P binding ratio and subsequent Al dosage.…”

Section: Lake-wide Al Dosage Considerationsmentioning

confidence: 99%

“…For instance, higher humic acid (HA) concentrations can significantly reduce PO −3 4 binding to Al(OH) 3 and result in higher Al:P ratios, although this effect weakens at higher initial PO −3 4 concentrations (de Vicente et al 2008b). This pattern is likely due to competition for binding sites by PO −3 4 at higher concentrations (Cheng et al 2004, Guan et al 2006, suggesting that Al:P ratios derived for natural sediment may be regulated in part by relative concentrations of redox-P versus other ions that can bind to Al(OH) 3 . To investigate this hypothesis, I examined Al:P ratios for sediment collected from Half Moon Lake, Wisconsin, that differed widely in redox-P concentration (i.e., ∼ 0.1 to >2 mg/g dry mass).…”

mentioning

confidence: 99%

See 3 more Smart Citations

Variations in the aluminum:phosphorus binding ratio and alum dosage considerations for Half Moon Lake, Wisconsin

James

2011

Lake and Reservoir Management

View full text Add to dashboard Cite

Section: Lake-wide Al Dosage Considerationsmentioning

confidence: 91%

Section: Alum Assaysmentioning

confidence: 99%

Section: Lake-wide Al Dosage Considerationsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Variations in the aluminum:phosphorus binding ratio and alum dosage considerations for Half Moon Lake, Wisconsin

James

2011

Lake and Reservoir Management

View full text Add to dashboard Cite

“…The ratio of the mentioned ions to phosphorus could be easily changed and controlled in streams and drainage ditches by applying tested deposits. The achieved level of phosphate reduction, combined with the low cost of producing the deposit using the new device (about $80 per ton of deposit) and the use of waste materials, makes the technology widely applicable and complementary to other methods for reducing phosphate pollution and preventing cyanobacterial blooms in reservoirs [40][41][42][43]. Another feature that is extremely important from the point of view of sustainable development is that the chemical deposits are formed only from natural, biodegradable fibrous raw materials.…”

Section: Discussionmentioning

confidence: 99%

Using Chemically Treated Organic Recycling Materials to Enhance Freshwater Purification

Bednarek¹,

Szklarek²,

Dziedziczak³

et al. 2016

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

The development of civilization and its accompanying anthropopressure have increased the accumulation of biogenic elements in aquatic ecosystems, which has accelerated the eutrophication of water bodies all over the world [1][2][3], and by doing so increased the production of tides of toxic cyanobacteria [4][5]. There is, therefore, a need to integrate ecohydrology with engineering solutions on the catchment scale to slow the rate of eutrophication [6], with the potential to permanently decrease the content of bioavailable phosphorus in water supplies Pol. J. Environ. Stud. Vol. 25, No. 5 (2016), 1847-1855 AbstractThe greatest source of phosphorus pollution in the freshwater ecosystem is erosion from agricultural areas and point sources. Although this pollution is typically moderated by precipitation and sedimentation, biological and physicochemical methods can be used. The aim of our study was to construct an alternative prototype solution incorporating a filter bed made of suitable recycled phytogenic materials (hemp and harl flax) mixed with chemical compounds (Ca(OH) 2 , FeCl 3 , and Al 2 (SO 4 ) 3 ) based on the results of laboratory and field experiments. An 80-90% reduction was noted for deposits with Ca(OH) 2 and Al 2 (SO 4 ) 3 compounds, and 42% for FeCl 3 during laboratory studies. The field studies did not provide such a high reduction of phosphates -only 2% for the Ca(OH) 2 deposit and 49% for the FeCl 3 deposit. This could be attributed to variable physical parameters (pH, temperature and dissolved oxygen) and high negative correlation (r = -0.6296; p = 0.003) with nitrate reduction for the Ca(OH) 2 deposit. However, greater reduction was noted when the phosphate concentration exceeded 1 mg PO 4 3-L -1 in field experiments.

show abstract

Synergistic effects of polyaluminum chloride and Phoslock on phosphate and cyanobacteria removal in eutrophic lake water

Sadeghi

Min

et al. 2019

AWWA Water Science

View full text Add to dashboard Cite

Polyaluminum chloride (PACl) and Phoslock® are two promising technologies for lake restoration. The objective of this study was to evaluate the synergistic effects of PACl and Phoslock on phosphate and cyanobacteria removal and solids' settling rates during coagulation treatment of water from Lake Kampeska, South Dakota. The lake water, spiked with Anabaena sp., was treated with PACl, Phoslock, and PACl+Phoslock, under controlled laboratory conditions. PACl with 70% basicity at a dose of 8 mg Al/L achieved phosphate, chlorophyll a, and turbidity removal efficiencies of 93.8%, 90.7%, and 93.5%, respectively. The corresponding removal efficiencies of Phoslock at a dose of 800 mg/L were 70.5%, 73.2%, and 90.0%, respectively. The combination of PACl (4 mg Al/L) and Phoslock (300 mg/L) resulted in 88.5%, 99.4%, and 99.5% removal efficiencies for phosphate, chlorophyll a, and turbidity, respectively. These removal efficiencies were 12.6%–23.5% or 10.5%–55.4% higher than PACl or Phoslock alone. The combined use of PACl and Phoslock also exhibited high tolerances to the variations in pH and dissolved organic carbon levels during coagulation. Coagulation treatment produced flocs that settled out of suspension. These flocs were resuspended to simulate hydraulic disturbance. The sedimentation rates following resuspension were in the order of PACl+Phoslock > PACl > Phoslock. Treatment with PACl+Phoslock improved turbidity reduction at a settling time of 30 min by 48.5%–61.6% after initial treatment compared with PACl and Phoslock. The results of this study suggest that the combined use of PACl and Phoslock is an effective strategy to remove phosphate and cyanobacteria in lake water. © 2019 American Water Works Association

show abstract

Effect of phosphate on removal of humic substances by aluminum sulfate coagulant

Cited by 48 publications

References 20 publications

Variations in the aluminum:phosphorus binding ratio and alum dosage considerations for Half Moon Lake, Wisconsin

Variations in the aluminum:phosphorus binding ratio and alum dosage considerations for Half Moon Lake, Wisconsin

Using Chemically Treated Organic Recycling Materials to Enhance Freshwater Purification

Synergistic effects of polyaluminum chloride and Phoslock on phosphate and cyanobacteria removal in eutrophic lake water

Contact Info

Product

Resources

About