Drinking water treatment by stepwise flocculation using polysilicate aluminum magnesium and cationic polyacrylamide

Ma, Jie; Wang, Runnan; Wang, Xiyue; Zhang, Hao; Zhu, Bo; Lian, Lili; Lou, Dawei

doi:10.1016/j.jece.2019.103049

Cited by 53 publications

(19 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This might be due that the collision probability is enhanced and the electrostatic interactions between the copolymer and dye are accelerated, resulting in the improvement of flocculation performance. Previous studies also reported that the flocculation process was endothermic and the increase of temperature was conducive to flocculation (Chen et al 2007;Ma et al 2019). Hence, the region and season have significant influence on the flocculation performance, and the superior flocculation effect can be achieved near the equator or in summer.…”

Section: Effect Of Temperature On Flocculation Efficiencymentioning

confidence: 95%

A cost-effective anionic flocculant prepared by grafting carboxymethyl cellulose and lignosulfonate with acrylamide

et al. 2021

View full text Add to dashboard Cite

How to efficiently utilize most abundant biomass of cellulose, lignin and their derivatives has become an emerging challenge as the anticipative oil depletion. In this paper, the ternary anionic copolymer of carboxymethyl cellulose-acrylamide-lignosulfonate (CAL) was successfully prepared by hydrothermal polymerization. Based on the flocculation characteristics of cationic methylene blue, the optimal polymerization process was confirmed as the raw material ratio of 1:1:1, initiator dosage of 0.9 wt %, the reaction time was 5 h and the reaction temperature was 55 °C. The results showed that the decolorization ratio was 87.5% at the CAL dosage of 600 mg/L for the 500 mg/L methylene blue simulated wastewater. The CAL achieved fast flocculation kinetics and super color removal ratios in the wide ranges of environmental pH, temperature and salt concentration. The flocculation mechanism is single charge neutralization. Moreover, the estimated treatment cost of CAL is 68.3% lower than that of commercial anionic PAM. The prepared anionic CAL flocculant has the characteristics of environmental safety, excellent flocculation performance and cost-effectiveness, which shows great potential in the field of dye wastewater treatment, and also provides a feasible way for the effective utilization of biomass resources.

show abstract

Section: Effect Of Temperature On Flocculation Efficiencymentioning

confidence: 95%

A cost-effective anionic flocculant prepared by grafting carboxymethyl cellulose and lignosulfonate with acrylamide

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Under certain conditions, the two can be combined in the form of chemical bonds to maintain the stability of their respective performances. 25,26 Compared with traditional inorganic flocculants, hybrid flocculants are more effective than traditional inorganic flocculants. [27][28][29] Therefore, the application of hybrid polymers in wastewater treatment is growing rapidly.…”

Section: Introductionmentioning

confidence: 99%

Characterization and flocculation evaluation of a new organic–inorganic hybrid polymer flocculant (PAC‐AM‐DMC)

Chen¹,

Zou²,

Tang³

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

A novel organic-inorganic hybrid flocculant PAC-AM-DMC is synthesized using potassium persulfate as an initiator, which was used in industrial wastewater treatment. Comparing with the traditional inorganic flocculant, this new flocculant has the advantage of low dosage and high efficiency. Simultaneously, it is less toxic and more environmentally friendly than the organic flocculant. The organic-inorganic hybrid flocculant PAC-AM-DMC demonstrates better flocculation than the commercial single type flocculant (PAC, PAM), and the effect is better than simply combining the two flocculants. It has potential for commercialization. When PAC:(AM + DMC) = 2:8, the initi-ator is 0.2 wt%, and the flocculant obtained by reacting at 50 C for 4 h has the best effect on sewage treatment. When the pH is 7, the treatment effect of PAC-AM-DMC is best with the dosage of 10 ppm. Correspondingly, the amount of flocculant is 10 mg/L, and the turbidity of simulated sewage is 172 nephelometric turbidity unit (NTU), which is over 98% of turbidity removal efficiency. In addition, the prepared hybrid flocculant is nearly noncorrosive and posed little damage to the equipment. And the hybrid flocculant has excellent salt resistance.

show abstract

“…They are also rapidly developed and used because of their cost-effective. 12,13 The use of iron-base inorganic polymer coagulants is far inferior to that of aluminum inorganic polymer coagulants owing to low adjustable basicity and deep color of wastewater treated. So, aluminum inorganic polymer coagulants, such as polymeric aluminum chloride (PAC), poly-silicate aluminum chloride (PSAC), poly-silicate aluminum sulfate (PSAS) and poly-silicate aluminum ferric sulfate (PSAF) etc., have good performance in the coagulation of various wastewaters.…”

Section: Introductionmentioning

confidence: 99%

“…Under suitable conditions, the removal efficiency was over 98% for turbidity and color, respectively. 21 To the best of the author's limited knowledge, the synthesis of PSAS is mainly divided into compound method and copolymerization two methods. 12,22 The treatment of oil-contaminated water using the poly-silicate aluminum ferric sulfate prepared by compound method was reported by You et al 23 Compound method needs to obtain a poly-silicate acid solution in advance.…”

mentioning

confidence: 99%

Characteristics of poly-silicate aluminum sulfate prepared by sol method and its application in Congo red dye wastewater treatment

et al. 2021

View full text Add to dashboard Cite

show abstract

Drinking water treatment by stepwise flocculation using polysilicate aluminum magnesium and cationic polyacrylamide

Cited by 53 publications

References 32 publications

A cost-effective anionic flocculant prepared by grafting carboxymethyl cellulose and lignosulfonate with acrylamide

A cost-effective anionic flocculant prepared by grafting carboxymethyl cellulose and lignosulfonate with acrylamide

Characterization and flocculation evaluation of a new organic–inorganic hybrid polymer flocculant (PAC‐AM‐DMC)

Characteristics of poly-silicate aluminum sulfate prepared by sol method and its application in Congo red dye wastewater treatment

Contact Info

Product

Resources

About