Role of Al13 species in removal of natural organic matter from low specific UV absorbance surface water and the aggregates characterization

Xu, Weiying; Gao, Baoyu; Wang, Yan; Yang, Zhonglian; Bo, Xiaowen

doi:10.1016/j.cej.2011.04.042

Cited by 25 publications

(19 citation statements)

References 35 publications

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“…For Al 2 (SO4) 3 coagulation, the order was as following: pH 4.0 (9 mg/L) > pH 6.5 (15 mg/L) > pH 8.0 (15 mg/L). Moreover, the fractal dimension of flocs indicated that Al 13 species conducted to compact aggregates at low concentration and pH [7].…”

Section: +mentioning

confidence: 99%

“…Recently, Xu et al [7] focused on the effect of coagulant dose and pH on the coagulation behaviors of nano-Al 13 polymer (Al 13 O 4 (OH) 24…”

Section: Charge Neutralization As the Key Mechanism In Coagulation/flmentioning

confidence: 99%

“…This mechanism is called charge neutralization control [7][8][9][10]. Controlling the resultant electric charge of the colloid is the main key to the successful steps implicated in aggregation of colloids in raw waters [5,11].…”

Section: Introductionmentioning

confidence: 99%

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Controlling Coagulation Process: From Zeta Potential to Streaming Potential

Ghernaout¹

2015

AJEP

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This review concerns the using of Zeta and streaming potentials in the coagulation process control. Coagulation process is usually explained by charge neutralization mechanism. The negative charge may be quantified by Zeta potential or streaming potential measures. Prior to the advent of streaming current monitors, Zeta meters were the primary instruments for measuring electrokinetic properties as related to coagulant dose. Both instruments measure the potential and indirectly the particle surface charge, but use very different methods. Even if the on-line streaming current monitor can provide coagulation process optimization when properly installed, maintained, and interpreted, jar tests experiments and Zeta meters remain indispensable.

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Section: +mentioning

confidence: 99%

“…Recently, Xu et al [7] focused on the effect of coagulant dose and pH on the coagulation behaviors of nano-Al 13 polymer (Al 13 O 4 (OH) 24…”

Section: Charge Neutralization As the Key Mechanism In Coagulation/flmentioning

confidence: 99%

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Controlling Coagulation Process: From Zeta Potential to Streaming Potential

Ghernaout¹

2015

AJEP

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“…PACl was diluted from commercial PACl. Initial alum speciation of coagulant was determined by the ferron method [34]. The results were summarized in Table 2.…”

Section: Chemicals and Coagulantsmentioning

confidence: 99%

“…Strength factor (S f ) and recovery factor (R f ) are well-established parameters for describing floc strength and recovery ability and can be calculated as follows [34]: …”

Section: Floc Strength and Recovery Factorsmentioning

confidence: 99%

Effects of Al2O3 and TiO2 on the coagulation process by Al2(SO4)3 (AS) and poly-aluminum chloride (PACl) in kaolin suspension

Xiao

Wang

2014

Separation and Purification Technology

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a b s t r a c tMore and more nanoparticles may be found in the aquatic environment. Effects of different nanoparticles (nano-Al 2 O 3 and nano-TiO 2 ) on the coagulation process in kaolin suspension (with or without humic acid) were investigated. The results indicated that when the pH was 7.0 in kaolin suspension, the strength factor with the presence of TiO 2 increased from 28.79% to 48.69% and when the concentration of TiO 2 was larger than 1.6 mg/L, the strength factor decreased to 23.39%. The removal efficiencies for Al 2 O 3 were 58.27%, 62.73% and 47.3% under pH 6.0, 7.0 or 8.5. The removal efficiencies for TiO 2 were 38.12%, 52.25% and 27.19%. When the concentration of DOC was 2.5 mg/L under pH 7.0, the recovery factor increased from 54.55% to 62.65% with increasing concentration of Al 2 O 3 from 0.0 mg/L to 2.0 mg/L, and it increased from 54.55% to 67.74% for TiO 2 . PACl produced larger flocs, and this may be caused by higher charge neutralization ability and the electrostatic patch effect. The removal efficiency for TiO 2 decreased from 52.25% to 22.13% with increasing concentration of DOC from 0 mg/L to 7.5 mg/L. The removal efficiency for Al 2 O 3 decreased from 62.73% to 32.12%.

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