Biopolymer-based adsorptive membrane for simultaneous removal of cationic and anionic heavy metals from water

Shokri, Elham; Khanghahi, Bita; Esmizadeh, Elnaz; Etemadi, Habib

doi:10.1007/s13762-021-03592-9

Cited by 11 publications

(7 citation statements)

References 52 publications

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“…It also had an excellent separation efficiency for oil/water separation, and the maximum water fluxes of non-emulsified and emulsified oil/water system under atmospheric pressure were 2018 and 1861 L•m −2 •h −1 , respectively. Shokri et al 30 prepared PLA/hydroxyapatite (HAp) adsorption membranes by the non-solvent-induced phase separation method. The adsorption membranes with 2.5 wt % HAp was shown to have high porosity, hydrophilicity, better mechanical strength, and pure water flux 1100 L•m −2 • h −1 .…”

Section: ■ Introductionmentioning

confidence: 99%

Biomimetic Polylactic Acid Electrospun Fibers Grafted with Polyethyleneimine for Highly Efficient Methyl Orange and Cr(VI) Removal

Deng

et al. 2023

Langmuir

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The rapid growth of industrialization has resulted in the release of large quantities of pollutants into the environment, especially dyes and heavy metals, which are environmentally hazardous for humans and animals. It is considered as the most promising and environmentally friendly route to develop green materials by using the green modification method, which has no negative impact on the environment. In this work, the green material of polylactic acid (PLA) was used as the substrate material, and a novel modification method of polydopamine (PDA)-assisted polyethyleneimine (PEI) grafting was developed. The electrospun PLA fibers are mainly composed of stereocomplex crystallites, which were achieved via the electrospinning of poly(l-lactic acid) and poly(d-lactic acid). The water-soluble PEI was grafted onto the PDA-modified PLA fibers through the glutaraldehyde-assisted cross-linking reaction. The prepared composite fibers can be degraded, which is environmentally friendly and meets the requirements of sustainable development. The potential application of such PLA composite fibers in wastewater treatment was intensively evaluated. The results show that at appropriate fabrication conditions (PDA concentration of 3 g·L–1 and a PEI molecular weight of 70,000 g·mol–1), the composite fibers exhibit the maximum adsorption capacities of 612 and 398.41 mg·g–1 for methyl orange (MO) and hexavalent chromium [Cr(VI)], respectively. Simultaneously, about 64.79% of Cr(VI) adsorbed on the composite fibers was reduced to Cr(III). The above results show that the PLA composite fibers have a good development prospect in the field of wastewater treatment.

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Section: ■ Introductionmentioning

confidence: 99%

Biomimetic Polylactic Acid Electrospun Fibers Grafted with Polyethyleneimine for Highly Efficient Methyl Orange and Cr(VI) Removal

Deng

et al. 2023

Langmuir

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“…Also it has been studied and proved that HAp can induce surface negative charge (zeta potential$6.1) potential which is proper to enhance the antifouling properties of UF membranes. [27][28][29][30][31] In bio-based polymers, PLA is a renewable thermoplastic that has attracted much attention due to its hydrophilic properties and biocompatibility. [32][33][34][35] Some studies have focused on blends with PLA for adjusting the degradation rate and increasing the hydrophilicity of these polymer blends.…”

Section: Introductionmentioning

confidence: 99%

“…The objective behind choosing HAp as an additive lies in its hydrophilic properties. Also it has been studied and proved that HAp can induce surface negative charge (zeta potential~6.1) potential which is proper to enhance the antifouling properties of UF membranes 27–31 …”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterizations of degradable PVC/PLA‐HAp ultrafiltration membrane with enhanced antifouling properties

Shokri

Khanghahi

Effati

2023

J of Applied Polymer Sci

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Degradable membranes were obtained by blending of polyvinyl chloride (PVC) with poly lactic acid (PLA) as biodegradable polymer. The effect of the amount of PLA from 10 to 30 wt% on the PVC membrane properties was investigated. The PVC/PLA(80/20) membrane exhibited higher porosity, water uptake and pure water flux than other fabricated membranes. The PVC/PLA(80/20) membrane in TGA results showed that lower temperature required to decompose the membrane in compare of neat PVC membrane. The effect of the amount of hydroxyapatite (HAp) from 0.0 to 3.0 wt% on the PVC/PLA(80/20) membrane structural and antifouling properties was investigated. With the increase in the amount of the HAp up to 2.5 wt%, membrane porosity, hydrophilicity and pure water flux increased. PVC/PLA(80/20)‐2.5 membrane showed higher surface roughness in compare of neat PVC and PVC/PLA(80/20) blended membrane, resulting in higher antifouling properties. Also in the SEM images, embedding the HAp causes to suppress the macrovoids in the cross section of membrane with a higher number of surface pores, which also had lower pore diameter.The humic acid rejection ratios of all PVC/PLA‐HAp nanocomposite membranes were higher than 87%; and all the nanocomposite membranes exhibited higher reversible fouling ratios (RFRs) than the neat PVC membrane.

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“…The adsorption method based on natural sorbents is used widely for its simplicity, low costs, and high efficiency. [10][11][12] Among many materials that are used for sorption like activated carbon, [13][14][15] carbon nanotubes, [13] clays, [13,16] zeolites, [13,14] bioadsorbents, [10,13] silica, [15,17] wood ash, [4] and apatite, [10][11][12][18][19][20][21][22][23][24] the hydroxyapatite have promising properties for the heavy metals removal from the wastewater. The hydroxyapatite (HAp) having the formula (Ca10(PO4)6(OH)2) can occur in different forms like the bare HAp, fluorapatite (Ca10(PO4)6F2), and chlorapatite (Ca10(PO4)6Cl2).…”

Section: Introductionmentioning

confidence: 99%

“…Due to its physico-chemical properties it is widely synthesized to be used for adsorption of many inorganic compounds like heavy metal ions such as Cu 2+ , [11,19] Zn 2+ , [19] Cd 2+ , [10,11] Co 2+ , Ni 2+ , Hg 2+ , [22,25] Cr 6+ , [21] Ag + , [18] Pb 2+ , [12,14] Fe 3+ and Cr 3+ . [3,22] Hydroxyapatite also has tremendous potential for the removal of anions like As 3-, [24] F − , [26,27] organic pollutants like phenol, [18,23] nitrobenzene, [28] and even antibiotics with high adsorption ability. [29][30][31] Hydroxyapatite can be synthesized from chemical sources or obtained from natural sources such as animal bones; [12,25] however, it can also be easily prepared from the natural apatite ores.…”

Section: Introductionmentioning

confidence: 99%

Co²⁺ and Cr³⁺ ions removal from wastewater by using nanostructural hydroxyapatite

Phuong,

Thom,

Nam

et al. 2022

Vietnam Journal of Chemistry

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Due to the growing pollution of the environment, water purification methods have to be improved. One of the most effective solutions is the removal of heavy metal ions by porous materials, including hydroxyapatite. Lao Cai Province in Vietnam has a tremendous reservoir of apatite ore that can be a precursor for nanostructural materials. In this paper, we refer to the recent studies on removing heavy metal salts, including the cobalt and chromium ions, from the wastewater by the nanostructural hydroxyapatite obtained from the apatite ore gained in the Lao Cai Province. The measurements were performed according to the pH, mass of the adsorbent addition into the real wastewater solution, and time exposition onto the adsorbent; and the suitable condition is a dose of modified apatite of 1 g/L; contacting time of 60 minutes and 6 g/L and 15 minutes in the pH range from pH0 (3.76 and 6.57) to neutral pH corresponding to Cr3+ and Co2+. We show that just a small amount of the nanostructural hydroxyapatite can work efficiently to remove the chromium and cobalt ions from the solution with maximum adsorption capacity is 70.37 mg/g and 13.52 mg/g, respectively.

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Biopolymer-based adsorptive membrane for simultaneous removal of cationic and anionic heavy metals from water

Cited by 11 publications

References 52 publications

Biomimetic Polylactic Acid Electrospun Fibers Grafted with Polyethyleneimine for Highly Efficient Methyl Orange and Cr(VI) Removal

Biomimetic Polylactic Acid Electrospun Fibers Grafted with Polyethyleneimine for Highly Efficient Methyl Orange and Cr(VI) Removal

Fabrication and characterizations of degradable PVC/PLA‐HAp ultrafiltration membrane with enhanced antifouling properties

Co²⁺ and Cr³⁺ ions removal from wastewater by using nanostructural hydroxyapatite

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Biopolymer-based adsorptive membrane for simultaneous removal of cationic and anionic heavy metals from water

Cited by 11 publications

References 52 publications

Biomimetic Polylactic Acid Electrospun Fibers Grafted with Polyethyleneimine for Highly Efficient Methyl Orange and Cr(VI) Removal

Biomimetic Polylactic Acid Electrospun Fibers Grafted with Polyethyleneimine for Highly Efficient Methyl Orange and Cr(VI) Removal

Fabrication and characterizations of degradable PVC/PLA‐HAp ultrafiltration membrane with enhanced antifouling properties

Co2+ and Cr3+ ions removal from wastewater by using nanostructural hydroxyapatite

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Co²⁺ and Cr³⁺ ions removal from wastewater by using nanostructural hydroxyapatite