Ions In Wastewater Research Articles

A selective colorimetric and efficient removal strategy for mercury (II) using mesoporous silver-melamine nanocomposites synthesized by controlled supramolecular self-assembly

Mesoporous silver-melamine (Ag-MA) nanocomposites were synthesized by controlled supramolecular self-assembly with various structural morphologies. It was discovered that the rod-like Ag-MA nanocomposites could present the larger Hg2+-enhanced catalysis by forming Ag-Hg alloys. Also, they could display large surface-to-volume area and high aqueous stability for the selective Hg2+ enrichment and absorption of Hg2+ ions by yielding the stable coordination complexes. A catalysis-based colorimetric method was thus developed using 96-wells plates to probe Hg2+ ions in blood and wastewater with the linear Hg2+ concentrations ranging from 1.0 nM to 600 nM and 0.50 nM to 700 nM, respectively. Besides, mesoporous Ag-MA absorbents could facilitate the removal of Hg2+ ions in wastewater with the removal efficiency up to 99.76 % and the absorption capacity of 598.99 mg g−1.

Preparation of modified sodium alginate aerogel and its application in removing lead and cadmium ions in wastewater

A low-cost, environment-friendly sodium alginate-meso-2,3-dimercaptosuccinic acid hybrid aerogel (SA-DMSA) was synthesized by simple chemical grafting and vacuum freeze-drying method and used to remove heavy metal ions in wastewater. The as-prepared SA-DMSA showed high affinity for heavy metal ions, such as Pb2+, Cd2+, Cu2+, Cr3+, and Co2+, and can remove >90% of the metal ions from the corresponding solution. SA-DMSA also exhibited high selectivity to Pb2+ and Cd2+, and the maximum adsorption capacities for Pb2+ and Cd2+ reached 116.4 and 91.2 mg/g, respectively. The SA-DMSA adsorbent can be regenerated by a simple one-step acid washing, and the adsorption performance remained stable after repeated use. Given its low-cost and easy-to-obtain raw materials, simple preparation process, and simple regeneration process of the adsorbent, SA-DMSA has broad application prospects in the treatment of low-concentration heavy metal ions, especially for wastewater containing Pb2+ and Cd2+.

Atomically dispersed Eu(III) sites in natural deep eutectic solvents based fluorescent probe efficient identification of Fe3+ and Cu2+ in wastewater.

Heavy metal ions in wastewater have brought serious environmental pollution. To improve the detection efficiency, it is important to find useful fluorescent probes. The emerging green natural deep eutectic solvents (NADESs) offer attractive option for "green" detection for its good biocompatibility, easy preparation, and high sensitivity. In this study, a multi-functionalized fluorescent probe with atomically dispersed EuCl3·6H2O in amino acid-based NADESs (l-Glutamic acid/Glycerol, l-Glu/Gly) was synthesized by metal-ligand coordination interactions with a mass ratio of 15:1. Combined with the NADESs and rare earth metal, the l-Glu/Gly/EuCl3·6H2O could form the amino site and Eu2+ site fluorescent centers. Under the excitation wavelength of 370nm, it had dual emission peaks at 425nm and 470nm with efficient resonance energy transfer. The stable optoelectronic properties of l-Glu/Gly/EuCl3·6H2O under external factors, such as mass ratio (13,1 to 18:1), temperature (30-50°C), pH (1 to 14) and storage time ( >42days), approved l-Glu/Gly/EuCl3·6H2O an excellent fluorescence probe. In the application of water-quality monitoring, Fe3+ and Cu2+ could react with l-Glu/Gly/EuCl3·6H2O in different reactive patterns. The blue fluorescence was quenched by Fe3+ and enhanced by Cu2+, thus metal ions could be distinguished with high sensitivity. The detective process was determined and the fluorescent mechanism was also proposed. l-Glu/Gly/EuCl3·6H2O fluorescent probe was demonstrated to be an efficient fluorescent probe for metal detection avoiding the hydrothermal process, and the cumbersome of ilter, dialysis, freeze drying.

Polydopamine-functionalized graphene oxide compounded with polyvinyl alcohol/chitosan hydrogels on the recyclable adsorption of cu(II), Pb(II) and cd(II) from aqueous solution

Polydopamine-Functionalized graphene oxide (PDA-GO) was used to form Polyvinyl Alcohol/Chitosan/PDA-GO (PVA/CS/PDA-GO) hydrogels. FTIR, TGA and SEM investigation showed that PDA had been successfully loaded on graphene oxide nanosheets. Adsorption of metal ions onto the novel PVA/CS/PDA-GO hydrogel beads with variations in pH, contact time, initial metal concentration and temperature had been investigated. Adsorption data were well accurately described by Langmuir isotherm and pseudo-second-order kinetic model at the optimum pH 5.5. The maximum adsorption capacities of the PVA/CS/PDA-GO were 210.94 mg·g−1, 236.20 mg·g−1 and 214.98 mg·g−1 for Cu(II), Pb(II) and Cd(II) ions with 40 C, respectively. Meanwhile, desorption efficiency and reusability of the adsorbents were assessed on basis of six consecutive adsorption-desorption cycles. This work provides a simple and environmentally friendly method to obtain the PVA/CS/PDA-GO hydrogel beads, which really would be a potential recyclable adsorbent for removal of hazardous metal ions in waste water.

Highly cost-efficient sorption and desorption of mercury ions onto regenerable poly(m-phenylenediamine) microspheres with many active groups

Abstract Poly(m-phenylenediamine) (PmPD) microspheres were productively and sustainably synthesized by a facile one-step chemical oxidative polymerization of m-phenylenediamine with ammonium persulfate in pure water without any acid or alkali. A comprehensive characterization of the structures, morphology, and nature of PmPD microspheres suggested that they exhibited highly chemical/thermal resistance and strong Hg(II) adsorbability. The batch static sorption/desorption of mercury ions were systematically optimized by adjusting the sorption/desorption time and temperature, mercury-ion concentration, sorbent dosage, and the species, concentration and dose of desorbents. The microparticles exhibit high Hg(II) sorption capacity up to 1499.2 mg/g at an initial Hg(II) concentration of 1986 mg/L, high Hg(II) partition coefficient up to 5040 mg/(g.μM) at an initial Hg(II) concentration of 20 mg/L, and high initial sorption rate up to 763.3 mg/(g.min). The dynamic sorption results suggest that the breakthrough and saturation times of the column loaded with the microparticles toward 1.99 mM Hg(II) solution at the flow rate of 1 mL/min are 19.8 h and 58.0 h, respectively. After 5 dynamic sorption-desorption cycles, the column efficiency is still high, indicating good reusability. A sorption mechanism including the first reduction from mercury-ion to mercurous-ion by amino and imino groups, and the second complexation and ion exchange of mercurous-ions is proposed. Without the pollution caused by the preparation or part solubility of sorbents themselves, the PmPD microspheres are cost-effectively and eco-benignly applicable to elimination and recovery of mercury ions in wastewater. This generates a unique solution to sustainable problems of sorbents themselves.

Design of l-Cysteine Functionalized UiO-66 MOFs for Selective Adsorption of Hg(II) in Aqueous Medium.

Mercury ions can cause a series of hazards to humans and the environment, even in trace amounts. Here, we designed a novel adsorbent (Cys-UiO-66) by functionalizing NH2-UiO-66 with l-cysteine for selective removal of Hg(II) from solution. The Cys-UiO-66 was characterized by different instruments. The adsorption property of Cys-UiO-66 was evaluated by batch methods. The maximum adsorption capacity was 350.14 mg/g at pH 5.0. Furthermore, the adsorption isotherm and kinetics models were in accord with the Langmuir and pseudo-second-order models, respectively, evidencing that the adsorption behavior was dominated by monolayer chemisorption. The Cys-UiO-66 had better affinity for Hg(II) than other coexisting ions in wastewater and could be regenerated for at least five cycles. The results prove that Cys-UiO-66 is a talented and efficient sorbent for mercury ions.

Adsorption mechanism of copper ions in aqueous solution by chitosan–carboxymethyl starch composites

ABSTRACTBased on the structural characteristics of chitosan (CTS) and carboxymethyl starch (CMS)， CTS–CMS composites were prepared by crosslinking. The composites had a plurality of reactive functional groups such as NH2, NH3+, COOH, and OH and are applied to the adsorption of Cu2+ in aqueous solution. The adsorption capacity and stability in acidic solution of the composites were preferable to that of raw material. The effects of temperature, contact time, initial concentration, and pH on the adsorption of Cu2+ were investigated. Infrared spectroscopy, scanning electron microscope–energy dispersive spectrometer, X‐ray diffraction, and X‐ray photoelectron spectroscopy were used to explore the adsorption mechanism. The experiment showed that chemisorption and physisorption coexisted in the adsorption process. It is promising to apply this adsorbent to remove the metal ions in wastewater. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48636.

Effect of particles size adsorbent of sugarcane bagasse and contact time on removal Pb(II) ions in wastewater by using vertical series column method

Amounts of heavy metals in wastewater can cause problems for living things and the environment. Handling efforts have been done with various methods. A relatively effective and efficient method is the adsorption. This study aims at removing Pb (II) in water using adsorbent of sugarcane bagasse with column system. The experimental design as a fixed variable consisted of 50 g of adsorbent, and 10 litres adsorbate volume, flow rate of 7 litres / minute. The independent variables consist of particle sizes with variations of 10; 20; 30 mesh and contact time with variation 0;5;10;15;20;30;60;90;120;150;180;210;240 minutes and the dependent variable of Pb(II) concentration (ppm). The results showed that the removal of Pb (II) was influenced by particle size factor of adsorbent and contact time. Universally the best removal power occurs on the size of 20 mesh adsorbent particles and with a contact time of 30 minutes. The fastest and highest removal percentage based on parameters of Pb(II) concentration for 10 mesh particles: 53.34% at contact time 180 minutes, 20 mesh particles: 54.84% at contact time 30 minutes, and 30 mesh particles: 65.67% at contact time 210 minutes.

Construction of three-dimensional g-C3N4/attapulgite hybrids for Cd(II) adsorption and the reutilization of waste adsorbent

Here we report a graphitic-C3N4 (g-C3N4) modified ATP adsorbent, g-C3N4/ATP, to enhance the adsorption of Cd(II) ion in wastewater, and the as-prepared adsorbent could be recovered as a CdS/g-C3N4/ATP photocatalyst utilized for the degradation of antibiotic pollutant. Due to the surface defects of g-C3N4 caused by the tri-s-triazine (C6N7) units, ATP could be bounded with g-C3N4 strongly. The combined adsorption sites, that the surface hydroxyl on ATP and the defected N sites on g-C3N4 attributed to the enhanced Cd(II) adsorption on g-C3N4/ATP hybrid (CA-0.50), which was 61.1 mg·g−1 and reached to the 1.76 times of that on the raw ATP. Meanwhile, due to the flexible structure of g-C3N4, the g-C3N4/ATP hybrid possessed a three-dimensional structure, and favored to improve the stability of adsorption by locking the adsorbed Cd(II). The Cd(II) adsorption on g-C3N4/ATP was well fitted the Langmuir isotherms model and exhibited the monolayer adsorption. For the recovered CdS/g-C3N4/ATP composite, it exhibited an excellent performance in the photodegradation of tetracycline with low concentration (25 ppm), on which the mineralization efficiency of tetracycline reached to 59.7% in 15 min under simulated solar light irradiation.

Potential of removing Cd(II) and Pb(II) from contaminated water using a newly modified fly ash

Modified fly ash was prepared through low-temperature roasting method using NaOH as activator. The techniques of Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS) and the X-ray diffraction (XRD) were introduced to analyze the chemical and physical performance of samples, respectively. It was found that a significant improvements in activity and specific surface area of adsorbent. This work systematically reported the uptake performances of modified materials for single and two mixed toxic cations Pb(II) and Cd(II). The results unveiled that pseudo-second-order model was suitable to analyze the adsorption process. The adsorption process were better fitted by Langmuir model and the maximum uptake capacities were 126.55 and 56.31 mg g-1 for Pb(II) and Cd(II) in single system at 298 K, respectively. Additionally, in mixed solution, the maximum uptake capacity reduced to 120.48 and 36.10 mg g-1 under the same adsorption conditions. Competitive adsorption results demonstrated that adsorption ability was restricted by other metal ions, as while as, the binding affinity of two cations followed the order of Pb(II)>Cd(II). Meanwhile, the co-existed cations as Ca(II), Mg(II) Na(I) and K(I) had antagonistic effects on the uptake of Cd(II) and Pb(II). The results indicate that the modified fly ash was a low-cost and effective adsorbent for the cleaning up metal ions in wastewater, which has a promising application prospect.

Removals of Cu(II), Ni(II), Co(II) and Ag(I) from wastewater and electricity generation by bimetallic thermally regenerative electro-deposition batteries

The treatment of heavy metal ions in wastewater is of great significance for protecting the environment and human health. To improve the power density and removal efficiency of thermally regenerative ammonia electro-deposition battery and expand the concentration range of effective wastewater removal, a new method for removing Cu(II), Co(II), Ni(II) and Ag(I) from wastewater while generating high-power electric energy by using waste heat, called bimetallic thermally regenerative electro-deposition battery (B-TREB), was constructed in this work. For Cu(II)-containing wastewater with a wide concentration range of 0.002–0.3 M, the removal efficiency (RE) of Cu/Zn-TREB could reach more than 90%. With the initial concentration of Cu(II) being increased from 0.0005 to 0.3 M, the peak power density was enhanced from 20 to 546 W m−2. Besides, for 0.01 M and 0.1 M Co(II) wastewaters, the REs of Co/Zn-TREB were 85% and 90%, respectively. The RE of Ni/Zn-TREB was 88% for 0.01 M Ni(II) wastewater. These results illustrated that B-TREBs could remove many kinds of heavy metal ions in the wastewaters while maintaining a high removal efficiency of ~90% over a wide concentration range, and the produced high-power electricity could provide energy for further treatment or other uses.

Hydroxyapatite Nanoparticles for Acidic Mine Waters Remediation

Mining activities have a high negative impact on the environment and on human health. Environmental impacts can result in contamination of surface water, groundwater, soil and air. Large volumes of wastewater produced by mining activities have to be remediated before being discharged into the environment. Due to the complex composition of wastewater coming from the mining industry and because their negative impacts, numerous remediation techniques have been applied. Adsorption is one of the most extensively used ways to remediate mining wastewater as a consequence of its low cost, easiness to be performed, and also due to the wide variety of materials (natural and synthetic) that can be use as adsorbents. Hydroxyapatite (HAP, Ca10(PO4)6(OH)2), a naturally occurring form of calcium phosphate has a good capacity to remove heavy metal ions from aqueous solutions due to its excellent properties. By preparing hydroxyapatite using different synthesis methods, its properties can be manipulated in order to increase the adsorption properties and reactivity. Herein, we reported synthesis of hydroxyapatite (HAP) samples using different synthesis conditions to establish the effect of synthesis conditions onto HAP properties. The HAP samples prepared have been characterized by the use of X-ray diffraction, FT-IR spectroscopy, specific surface measurements, Scanning Electron Microscopy (SEM). The stoichiometric compounds with high degree of crystallinity, low average particle diameter values, and low specific surface have been prepared by the solid state reaction and high calcination temepratures. The addition of surfactant (dispersant) has resulted in an increase in the specific surface area, which will result in an increase in the retention capacity of heavy metal ions in wastewater. The adsorbents prepared were used to remediate mine water. Results showed that non-calcinated HAP samples have a higher heavy metals adsorption capacity compared to HAP samples calcinated at 600 �C and 900 �C. The HAP samples prepared in presence of surfactant exhibit a higher heavy metals adsorption capacity than samples prepared in absence of surfactant. The values of the retention capacity differ depending on the nature of the metal ion: QMn(II) ] QFe(III) ] QZn(II) ] QPb(II) ] QNi(II). A change in the pH of mine water from 2.6 to 5.5 has occur that means that the metal ion retention mechanism goes through chemical reactions. The metal ions retention capacity suggests application of hydroxyapatite for remediation of mining wastewater.

Adsorptive removal of Ni2+ ions in wastewater using electrospun cellulose acetate / iron-modified nanozeolite nanostructured membrane

Release of heavy metal contaminated wastewater is one of the major problems being encountered by many industries due to its hazardous effect on the ecosystem, specifically its negative impacts on human health. Although essential in small quantities, nickel (Ni) and other heavy metals could be very dangerous to human health when uptaken at high concentrations. In this regard, this undertaking focused on the fabrication of nanofibers of cellulose acetate (CA) with varying concentrations (0, 1.0, 1.2 and 1.4 wt%) of iron-modified nanozeolite (Fe-MNZ) through electrospinning technique for the adsorption of Ni2+ ions in simulated wastewater. The membranes produced underwent different characterization techniques to determine the effect of Fe-MNZ addition on the nanofibers. FTIR result showed changes in the broadness of some bank peaks which signifies the interaction between CA and Fe-MNZ. SEM results showed increasing fiber diameter with increasing Fe-MNZ concentration having an 848.08 nm maximum diameter. Lastly, Freundlich isotherm and pseudo-first order kinetics govern the adsorption of the Ni2+ ions, with the highest adsorption capacity of 7.46 mg Ni2+ / g membrane.

Adsorptive removal of copper ions in water using electrospun cellulose acetate / chitosan nanostructured membrane

Nanostructured membranes from cellulose acetate (CA) reinforced with chitosan (CS) were developed using electrospinning process and characterized in order to obtain the best blend for the removal of Cu2+ ions in wastewater. Different CA/CS ratios of 95:5 (w/w), 90:10 (w/w), and 85:15 (w/w), respectively, were prepared and electrospun on a constant voltage of 30 kV and a tip-to-collector distance of 18 cm, which are the optimum conditions for this blend. Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) were used to characterize the membrane in terms of its morphology and molecular structure. Among the three (3) blends prepared, CA with 15% load of chitosan had exhibited better membrane properties and therefore was utilized in the removal of Cu2+ ions in wastewater. The effect of contact time on the adsorption capacity at constant fiber dosage (0.05 g) in a 50 mL copper nitrate solution containing an initial concentration of 100 ppm Cu(II) was investigated. A strong affinity of Cu+2 ions for pure CA than CA/CS was observed after 4 hours of contact time. However, as equilibrium was established for CA/CS blend, the highest adsorption capacity was recorded. Adsorption kinetics studies were best fitted to pseudo-second-order model describing a chemisorption process that showed a covalent or electrostatic chemical bond between the adsorbent and adsorbate. CA loaded with CS in adsorption of Cu2+ ions in water showed that it is a novel process that could be widely used in the industry.

The utilization of hydroxylsodalite synthesized from coal fly ash for zinc removal in acid mine drainage

One of the alternative solution to reduce ash waste in landfills is by utilizing coal fly ash for the removal of metal ion in wastewater, especially acid mine drainage (AMD). In this study, zeolite was synthesized from coal fly ash using a two-step method, hydrothermal and fusion method. The coal fly ash and the zeolite product were characterized physically and were used for the removal of Zn2+ in AMD. The adsorption experiment was carried out using batch method in synthetic AMD solution to study the influential parameters such as adsorbent dosage, contact time, adsorbent isotherms and kinetics. The zeolite synthesized in this study resulting hydroxylsodalite zeolite type, which increases the surface area. It was revealed from the adsorption experiment that the removal efficiency of Zn2+ was 93.47% under the conditions of pH ± 3, initial concentration Zn2+ 100 ppm, optimum contact time 120 minutes, and adsorbent dose 6 g/L. Furthermore, the Langmuir isotherm model and the kinetics model of pseudo-second-order fitted the adsorption data better, with the maximum sorption capacity of 27.32 mg/g. The result of this study indicate hydroxylsodalite synthesized from coal fly ash has great potential as an economical and sustainable material for the removal of metal ion Zn2+ in wastewater.

Removal of Oil from a Crude Oil-in-Water Emulsion by a Magnetically Recyclable Diatomite Demulsifier

Diatomite (DM) has superior adsorption performance for heavy metal ions in wastewater. However, the application of DM as a demulsifier in the treatment of a crude oil-in-water (O/W) emulsion has no...

Synthesis of highly-efficient photocatalyst for visible- light-driven hydrogen evolution by recycling of heavy metal ions in wastewater

Water pollution and energy crisis are two important research subjects awaited to solution. Herein, we propose a strategy of “turning scrap into wealth” to obtain the highly-efficient photocatalyst for hydrogen evolution by recycling of heavy metal ions in wastewater. The novel mesoporous zeolite Beta (mBeta) can be used as adsorbent to remove the heavy metal ions (i.e., Cd2+ and/or Zn2+) from wastewater due to its excellent adsorptive performance from the electrostatic affinity, ion-exchange ability and structural channels in zeolite. Subsequently, in-situ sulfuring of the Cd2+ or/and Zn2+ adsorbed mBeta was carried out to obtain highly-efficient photocatalysts. As expected, the sample CdS/ZnS-mBeta exhibited super photocatalytic activity and high stability under visible light irradiation. It is believed that the synergetic effect between CdS and ZnS nanoparticles are responsible for its good visible light absorption performance and the effective separation of photoelectrons and holes. Besides, the mBeta with high specific surface area can improve the dispersibility of sulfides, which would contribute to its high stability.

Tween 80 Modified Hydroxyapatite as an Adsorbent for Removal of Copper from Aqueous Solution

Hydroxyapatite was in this study modified with Tween 80 through ultrasound assisted chemical precipitation method. The Tween-modified hydroxyapatite (T-HA) was characterized by some analytical methods. T-HA particles were rod-shaped with an average length of 59 nm. The effect of contact time, pH, temperature, adsorbent dosage and initial concentration of Cu2+ on adsorption capacity were studied to determine the capacity of T-HA to adsorb copper ions. The removal efficiency for Cu2+ reached maximum (82.68%), at an initial concentration of Cu2+ of 200 mg/L and adsorbent dosage of 0.1 g at 35 °C for two hours reaction. The adsorption mechanism was determined by pseudo-first-order (PFO) and pseudo-second-order (PSO) kinetic models, while the equilibrium isotherms was fitted by Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models. Our data can best be described by a PSO kinetic model (R 2 = 0.99971) and D-R model (R 2 = 0.9377), suggesting a chemisorption mechanism. Application of Langmuir isotherm model (R 2 = 0.99337) indicated that Cu2+ was adsorbed on T-HA as a monolayer. These results demonstrated that the Tween-modified hydroxyapatite is a promising material for environmental remediation of copper ions in waste water.

Tween 80 Modified Hydroxyapatite as an Adsorbent for Removal of Copper from Aqueous Solution

Hydroxyapatite was in this study modified with Tween 80 through ultrasound assisted chemical precipitation method. The Tween-modified hydroxyapatite (T-HA) was characterized by some analytical methods. T-HA particles were rod-shaped with an average length of 59 nm. The effect of contact time, pH, temperature, adsorbent dosage and initial concentration of Cu2+ on adsorption capacity were studied to determine the capacity of T-HA to adsorb copper ions. The removal efficiency for Cu2+ reached maximum (82.68%), at an initial concentration of Cu2+ of 200 mg/L and adsorbent dosage of 0.1 g at 35 °C for two hours reaction. The adsorption mechanism was determined by pseudo-first-order (PFO) and pseudo-second-order (PSO) kinetic models, while the equilibrium isotherms was fitted by Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models. Our data can best be described by a PSO kinetic model (R2 = 0.99971) and D-R model (R2 = 0.9377), suggesting a chemisorption mechanism. Application of Langmuir isotherm model (R2 = 0.99337) indicated that Cu2+ was adsorbed on T-HA as a monolayer. These results demonstrated that the Tween-modified hydroxyapatite is a promising material for environmental remediation of copper ions in waste water.

Self-Assembled Naphthylidene-Containing Schiff Base Anchored Polystyrene Nanocomposites Targeted for Selective Cu(II) Ion Removal from Wastewater.

Self-assembled composite adsorbents that combine the controllability of self-assembly with a mild operation process are promising for removal of heavy metal ions in wastewater. The design and preparation of functionalized composite adsorbent materials with multiple-site adsorption ability remain the most attractive in effectively removing heavy metal ions. Inspired by the macroporous structure of charged polystyrene (PS) resin and chelation of Schiff bases with heavy metal ions, smart composite adsorbents are constructed based on the combination and synergistic effect of multiple hydrophobic, π–π stacking, and electrostatic noncovalent interactions between polystyrene resin and naphthylidene-containing Schiff base (NSB). The resulting hybrid nanomaterials (PS-NSB) have uniform porous structures and well-defined and multiple target sites. These properties promote diffusion of the target ion, increase the binding site, and enhance the removal efficacy. This study offers a new strategy to harness a self-assembled Schiff base with integrated flexibility and multifunctions to enhance target metal ion specific binding and removal effects, highlighting opportunities to develop smart composite adsorbents.