Anionic polyacrylamide efficiency in goethite removal from aqueous solutions: goethite suspension destabilization by PAM

Szewczuk-Karpisz, Katarzyna; Krasucka, Patrycja; Boguta, Patrycja; Skic, Kamil; Sokołowska, Z.; Wiśniewska, Małgorzata

doi:10.1007/s13762-018-2064-5

Cited by 15 publications

(6 citation statements)

References 23 publications

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“…On the other hand, if the system turbidity changes significantly over time, then the decrease in absorbance is also visible. Solid particles fall to the bottom of the vessel, the suspension gradually clarifies, which indicates low stability of the system (Szewczuk-Karpisz et al 2019;Wisniewska et al 2018a, b;Grządka and Matusiak 2017;Birdi 2003). The absorbance was measured at wavelength (λ) equal to 500 nm, which was selected based on the spectrum determination for kaolinite suspension (of white color).…”

Section: Methodsmentioning

confidence: 99%

Anionic polyacrylamide as a substance strengthening the Pb(II) immobilization on the kaolinite surface

Szewczuk-Karpisz

Wiśniewska

2019

Int. J. Environ. Sci. Technol.

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The main purpose of the study was to examine lead(II) ion immobilization on the kaolinite surface and determine the effect of soil flocculant (macromolecular compound) on this process. For this reason, the adsorption measurements of anionic polyacrylamide and/or Pb(II) ions on the kaolinite surface were performed. Moreover, the impact of heavy metal on electrokinetic and stability properties of kaolinite/polyacrylamide/supporting electrolyte system was determined. It was done based on the results of potentiometric titration, electrophoretic mobility, and absorbance measurements. The most important conclusions of the study were as follows: (1) kaolinite is an effective Pb(II) adsorbent when ion concentration in the environment equals 1 or 10 ppm (it adsorbs 80% and 72% of the ions, respectively), (2) when Pb(II) concentration in the environment is 100 ppm, kaolinite adsorbs only 29% of the ions, and (3) anionic polyacrylamide may strengthen the Pb(II) adsorption on the kaolinite surface (in the presence of 100 ppm AN PAM 30% and 1 ppm Pb(II), even 96% of the ions are adsorbed). Due to the above process, the bioavailability of heavy metal for organisms is considerably limited.

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Section: Methodsmentioning

confidence: 99%

Anionic polyacrylamide as a substance strengthening the Pb(II) immobilization on the kaolinite surface

Szewczuk-Karpisz

Wiśniewska

2019

Int. J. Environ. Sci. Technol.

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“…Goethite and gibbsite were also examined as sorbents of AN PAM containing 40% of carboxylic groups. At pH 5 the polymer adsorbed amount on gibbsite equaled 1.4 mg/m 2 [43], whereas on goethite -0.79 mg/m 2 [44]. All above values were obtained for initial AN PAM concentrations equal to 100 ppm.…”

Section: Suspension Stability Determination By the Use Of Spectrophotmentioning

confidence: 66%

“…It connects loose particles and favours the formation of large aggregates. As a result, the erosion phenomena are limited or inhibited [32][33][34][35][36][37][38][39][40][41][42][43][44]. Soil flocculants can also bind chemical compounds present in soil including heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Anionic polyacrylamide influence on the lead(II) ion accumulation in soil – the study on montmorillonite

Szewczuk-Karpisz

Wiśniewska

2020

J Environ Health Sci Engineer

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Purpose Polymeric substances, as soil conditioners, limit the erosion process as well as improve the soil structure. The same macromolecular compounds may influence the heavy metal accumulation in soil environment. The main aim of this study was investigation of anionic polyacrylamide (AN PAM) effect on the lead(II) ion sorption on the montmorillonite surface. The effects of Pb(II) ion concentration, sequence of heavy metal and anionic polymer addition into the system as well as anionic group content in the PAM macromolecules were also studied. Materials and methods The study was performed on montmorillonite (clay mineral). Two types of polymers were used: AN PAM 5% and AN PAM 30% containing 5% and 30% of carboxylic groups, respectively. The adsorbed amounts of Pb(II) ions or AN PAM on the solid were determined spectrophotometrically. Electrokinetic properties of the examined systems were established using potentiometric titration and microelectrophoresis method. The montmorillonite aggregation without and with selected substances was described based on the sedimentation study. Results At pH 5 the Pb(II) adsorbed amount on montmorillonite equaled 0.05 mg/m 2 (for the initial concentration 10 ppm). Anionic polyacrylamide increased this value significantly (it was 0.11 mg/m 2 with AN PAM 5% and 0.11 mg/m 2 with AN PAM 30%). The lead(II) ions presence causes a slight increase of the anionic PAM adsorption on the montmorillonite surface. For example, for the initial polymer concentration 100 ppm, the AN PAM 5% adsorbed amount without Pb(II) equaled 0.49 mg/m 2 , whereas with Pb(II)-0.57 mg/m 2. What is more, anionic polyacrylamide and lead(II) ions affected electrokinetic properties and stability of the montmorillonite suspension. Conclusions Anionic polyacrylamide makes the Pb(II) accumulation on the montmorillonite surface larger and, as a consequence, reduces the Pb(II) availability to organisms. Therefore, this macromolecular compound can certainly be used to remediate soils contaminated with heavy metals.

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“…−130 mV at pH higher than pK a ). The reported values in the literature are much less negative [40][41][42][43][44][45][46][47].…”

Section: Introductionmentioning

confidence: 85%

Synthesis of cross-linked poly(acrylic acid) nanogels in an aqueous environment using precipitation polymerization: unusually high volume change

2019

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For the first time, by using precipitation polymerization in an aqueous solution, a cross-linked poly(acrylic acid)—(pAA) nanogel was synthesized. pAA was synthesized and cross-linked with N,N′-methylenebisacrylamide (BIS) at 70°C in an acidified environment (pH 2) and containing 0.7 M NaCl using potassium persulfate as the initiator. Ionized pAA was soluble in water. The use of sodium chloride at low pH caused a decrease in the solubility of pAA and led to its precipitation and formation of cross-linked pAA nanogel. By using electron microscopies and light scattering techniques, the morphology, pH sensitivity and zeta potential of the obtained p(AA-BIS) nanogel were evaluated. The polymerization in an aqueous environment resulted in a very big swelling/shrinking coefficient (of approx. 4000) in response to pH and exhibited an unusually high negative zeta potential (of approx. −130 mV). These properties make the nanogel a very interesting sorbent and a construction material.

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Anionic polyacrylamide efficiency in goethite removal from aqueous solutions: goethite suspension destabilization by PAM

Cited by 15 publications

References 23 publications

Anionic polyacrylamide as a substance strengthening the Pb(II) immobilization on the kaolinite surface

Anionic polyacrylamide as a substance strengthening the Pb(II) immobilization on the kaolinite surface

Anionic polyacrylamide influence on the lead(II) ion accumulation in soil – the study on montmorillonite

Synthesis of cross-linked poly(acrylic acid) nanogels in an aqueous environment using precipitation polymerization: unusually high volume change

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