The influence of pH and BSA on the retention of selected heavy metals in the nanofiltration process using ceramic membrane

Nędzarek, Arkadiusz; Drost, Arkadiusz; Harasimiuk, Filip; Tórz, Agnieszka

doi:10.1016/j.desal.2015.04.019

Cited by 50 publications

(17 citation statements)

References 24 publications

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“…The results of these experiments including the high efficacy of removal of TSS and turbidity and the lesser reduction in the analysed forms of inorganic nitrogen are compatible with those presented by other studies including those by Yang et al () and Bonisławska, et al (). The high degree of removal of Al and Fe, despite the small size of these ions compared to the size of ceramic membrane pores, agrees with data from other authors, such as Luo, and Wan () and Nędzarek, Drost, Harasimiuk, and Tórz ().…”

Section: Resultssupporting

confidence: 90%

“…The formation of an additional pollutant layer on the membrane blocks membrane pores and acts as an additional filter, which causes a decrease in the filtrate stream, but increases the retention of substances of low molecular weight (Luo & Wan, ; Mahmoudi et al, ). A strong decrease in the filtrate stream is usually noted during the first 30–40 min of filtration, after which the stream stabilizes (Nędzarek et al). In our studies with NF, as well as the combined IC+NF and AC+NF, we noted a significant decrease in the filtrate stream during the first 10–15 min of filtration (Figure ).…”

Section: Resultsmentioning

confidence: 99%

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Assessment of the use of precipitating agents and ceramic membranes for treatment of effluents with high concentrations of nitrogen and phosphorus from recirculating aquaculture systems

2019

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Following the culturing of post‐juvenile African catfish, wastewaters were purified using single and integrated processes. Iron coagulant (IC), aluminium coagulant (AC), lanthanum modified bentonite (LMB) and ceramic membranes (NF – nanofiltration) were each tested in single processes, while the combination of IC + NF and AC + NF were used in the integrated process tests. Among the single processes, membrane filtration was the most effective in purifying the aquaculture effluent. The total suspended solids (TSS) were removed entirely and there was a near‐complete removal of turbidity (99.2%), as well as effective removal of Al and Fe (80.8% and 67.4% respectively). Precipitating agents overall removed TSS most faithfully, from 37.5% removal with AC, through 50.2% with IC, to 62.3% with LMB. Using integrated processes, the highest removal efficacy was recorded for TSS (100%) and turbidity (99.7% – IC + NF; 99.9% – AC + NF). Additionally, integrated processes attained a 96.8%–98.4% removal of NO2‐‐N. This study confirms the possibility of using IC, AC and LMB in chemical purification of effluents from recirculating aquaculture systems (RAS). However, due to their low removal efficacy for nitrogen and phosphorus, it is preferable to use NF or integrated processes – membrane filtration combined with chemical precipitation, methods which proved to be most effective for water purification in RAS.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Assessment of the use of precipitating agents and ceramic membranes for treatment of effluents with high concentrations of nitrogen and phosphorus from recirculating aquaculture systems

2019

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“…The steady state was usually obtained after 90 min of operation in continuous mode. More details regarding the experimental set-up can be found in [ 60 ]. After each filtration, the membrane was chemically cleaned according to the manufacturer’s recommendations, described by Nędzarek et al [ 30 ] and Bonisławska et al [ 61 ]: washing with 2% NaOH solution (T = 360 K, t = 40 min), rinsing with ultra-pure water, washing with 0.5% HNO 3 solution (T = 320 K, t = 30 min), and, finally, rinsing three times with ultra-pure water.…”

Section: Methodsmentioning

confidence: 99%

Effect of pH on Total Volume Membrane Charge Density in the Nanofiltration of Aqueous Solutions of Nitrate Salts of Heavy Metals

et al. 2020

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The separation efficiencies of aqueous solutions containing nitric salts of Zn, Cu, Fe or Pb at various pH in process of nanofiltration have been investigated experimentally. These results were used to obtain the total volume membrane charge densities, through mathematical modelling based on the Donnan–Steric partitioning Model. The experimentally obtained retention values of individual heavy metal ions varied between 36% (Zn2+ at pH = 2), 57% (Pb2+ at pH = 2), 80% (Fe3+ at pH = 9), and up to 97% (Cu2+ at pH = 9). The mathematical modelling allowed for fitting the total volume membrane charge density (Xd), which yielded values ranging from −451.90 to +900.16 mol/m3 for different non-symmetric ions. This study presents the application of nanofiltration (NF) modelling, including a consideration of each ion present in the NF system—even those originating from solutions used to adjust the pH values of the feed.

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“…Although BSA was relatively stable, it was still sensitive about pH and temperature. The pH value and temperature could affect the status of a protein [13]. The effect of pH on SE was studied at different pH values.…”

Section: Effect Of Ph and Temperaturementioning

confidence: 99%

Analysis of Bovine Serum Albumin Ligands fromPuerariae flosUsing Ultrafiltration Combined with HPLC-MS

Tang

Liu

2015

Journal of Chemistry

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Rapid screening techniques for identification of active compounds from natural products are important not only for clarification of the therapeutic material basis, but also for supplying suitable chemical markers for quality control. In the present study, ultrafiltration combined with high performance liquid chromatography-mass spectrometry (HPLC-MS) was developed and conducted to screen and identify bovine serum albumin (BSA) bound ligands from Puerariae flos. Fundamental parameters affecting the screening like incubation time, BSA concentration, pH, and temperature were studied and optimized. Under the optimum conditions, nine active compounds were identified by UV and MS data. The results indicated that this method was able to screen and identify BSA bound ligands form natural products without the need of preparative isolation techniques. Moreover, the method has more effective with easier operation procedures.

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The influence of pH and BSA on the retention of selected heavy metals in the nanofiltration process using ceramic membrane

Cited by 50 publications

References 24 publications

Assessment of the use of precipitating agents and ceramic membranes for treatment of effluents with high concentrations of nitrogen and phosphorus from recirculating aquaculture systems

Assessment of the use of precipitating agents and ceramic membranes for treatment of effluents with high concentrations of nitrogen and phosphorus from recirculating aquaculture systems

Effect of pH on Total Volume Membrane Charge Density in the Nanofiltration of Aqueous Solutions of Nitrate Salts of Heavy Metals

Analysis of Bovine Serum Albumin Ligands fromPuerariae flosUsing Ultrafiltration Combined with HPLC-MS

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