Towards a selective adsorbent for arsenate and selenite in the presence of phosphate: Assessment of adsorption efficiency, mechanism, and binary separation factors of the chitosan-copper complex

Yamani, Jamila S.; Lounsbury, Amanda W.; Zimmerman, Julie

doi:10.1016/j.watres.2015.11.017

Cited by 70 publications

(83 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, there are investigations suggesting the C3-hydroxyl group as further ligand for complexation substantiated by thermodynamic data that led to the development of refined models (Figure 2b) [67]. Further investigations supposed a neutral complex (see Figure 2c) consisting of two nitrogen ligands and two hydroxide ions coordinating the copper ion occurring at high Cu 2+ loadings and pH values of >5.5 [75,76]. The structures illustrated in Figures 2a-c can be described as "bridge model "since they involve the chelation of the Cu 2+ by nitrogen atoms from different glucosamine units in an inter-or intramolecular fashion [77].…”

Section: Remediation Of Heavy Metal Pollutants/contaminantsmentioning

confidence: 95%

“…A further option to remove toxic oxyanions as selenite or arsenite was provided by Yamani et al The group demonstrated that the chelation of copper ions leads to the formation of electron-accepting "anion" adsorption sites which did not exist previously, enabling the directed binding of these oxyanions. The bimetallic complex connected via oxygen linker offers the separation of both even in the presence of phosphate at high concentrations [76]. According to this, it was approved that Fe-crosslinked CS enables the adsorption of chromate.…”

Section: Remediation Of Heavy Metal Pollutants/contaminantsmentioning

confidence: 99%

See 1 more Smart Citation

Sewage Polluted Water Treatment via Chitosan: A Review

Hahn¹,

Zibek²

2018

Chitin-Chitosan - Myriad Functionalities in Science and Technology

View full text Add to dashboard Cite

Due to the increasing scarcity of water, wastewater treatment and water conditioning are one of the major future issues. Together with the need to apply highly accessible abundant materials and the demand to replace fossil-based chemicals with sustainable compounds from renewable resources, chitosan (CS) provides some of the solutions to obtain these goals and combines both, abundance and sustainability. Hence, the focus of this review is on the application of CS in wastewater treatment providing advantages and drawbacks in using CS in contrast to chitin. We herewith present the application of CS for coagulation/flocculation purposes, whether as native compound, as functionalized molecule or as blend, respectively, composite. The heavy metal, respectively, dye removal is an additional theme to be addressed in the body of the text. The third topic of this review contains the application of CS blends or composites in order to prepare membrane materials for water purification or conditioning. Together with a summary of the recent study, we discuss these findings and possible consequences for future works. In addition, we provide some theoretical background of the processes that CS is involved in and state some mechanistic insights.

show abstract

Section: Remediation Of Heavy Metal Pollutants/contaminantsmentioning

confidence: 95%

Section: Remediation Of Heavy Metal Pollutants/contaminantsmentioning

confidence: 99%

Sewage Polluted Water Treatment via Chitosan: A Review

Hahn¹,

Zibek²

2018

Chitin-Chitosan - Myriad Functionalities in Science and Technology

View full text Add to dashboard Cite

show abstract

“…The As biosorption capacities obtained in the control tests in this study were lower than those previously reported by Saavedra et al, (2018) in multimetallic solutions at the same metal concentrations, but without the addition of urea and mineral salts. It has been hypothesized that some of the added compounds such as urea or phosphates, besides enhancing the growth and resistance of S. almeriensis, could compete with As for the adsorption sites, decreasing the As uptake by microalgae cells (Yamani et al, 2016).…”

Section: Toc Concentration (Mg/l) Om Conditionmentioning

confidence: 99%

Influence of organic matter and CO2 supply on bioremediation of heavy metals by Chlorella vulgaris and Scenedesmus almeriensis in a multimetallic matrix

Saavedra

Muñoz

Taboada

et al. 2019

Ecotoxicology and Environmental Safety

View full text Add to dashboard Cite

This research evaluated the influence of organic matter (OM) and CO2 addition on the bioremediation potential of two microalgae typically used for wastewater treatment: Chlorella vulgaris (CV) and Scenedesmus almeriensis (SA). The heavy metal (HM) removal efficiencies and biosorption capacities of both microalgae were determined in multimetallic solutions (As, B, Cu, Mn, and Zn) mimicking the highest pollutant conditions found in the Loa river (Northern Chile). The presence of OM decreased the total biosorption capacity, specially in As (from 2.2 to 0.0 mg/g for CV and from 2.3 to 1.7 mg/g for SA) and Cu (from 3.2 to 2.3 mg/g for CV and from 2.1 to 1.6 mg/g for SA), but its influence declined over time. CO2 addition decreased the total HM biosorption capacity for both microalgae species and inhibited CV growth. Finally, metal recovery using different eluents (HCl, NaOH, and CaCl2) was evaluated at two different concentrations. HCl 0.1 M provided the highest recovery efficiencies, which supported values over 85% of As, 92% of Cu, and ≈ 100% of Mn and Zn from SA. The presence of OM during the loaded stage resulted in a complete recovery of As, Cu, Mn, and Zn when using HCl 0.1 M as eluent.

show abstract

“…[12] Adsorption technology has been widely investigated [19][20][21][22] for the removal of Se species from water nowadays in terms of high efficiency, simplicity in design of technology,a nd low cost. [11,16,23] Metal oxide adsorbents such as aluminum oxide, [22,24] a-Fe 2 O 3 , [25] and FeÀMn binary oxide [26] have been synthesized for SeO x 2À removal, but the adsorption capacity is not satisfactory (18-109 mg g À1 ). Recently,h igher adsorption capacity can be achieved by developed layered double hydroxide (LDH).…”

Section: àmentioning

confidence: 99%

“…[13][14][15][16][17][18] Therefore,the treatment of SeO 3 2À is the key to handling Se species in aqueous solution. [11,16,23] Metal oxide adsorbents such as aluminum oxide, [22,24] a-Fe 2 O 3 , [25] and FeÀMn binary oxide [26] have been synthesized for SeO x 2À removal, but the adsorption capacity is not satisfactory (18-109 mg g À1 ). [11,16,23] Metal oxide adsorbents such as aluminum oxide, [22,24] a-Fe 2 O 3 , [25] and FeÀMn binary oxide [26] have been synthesized for SeO x 2À removal, but the adsorption capacity is not satisfactory (18-109 mg g À1 ).…”

mentioning

confidence: 99%

Selective Capture of Toxic Selenite Anions by Bismuth‐based Metal–Organic Frameworks

et al. 2018

View full text Add to dashboard Cite

Chemically durable and effective absorbent materials for selenite (SeO 3 2À )r emain highly desirable for contamination remediation. Now ab ismuth-based metal-organic framework (Bi-MOF,C AU-17) was used as adsorbent to capture SeO 3 2À anions from aqueous solution with ultrahigh adsorption capacity of 255.3 mg g À1 and fast kinetics.F urthermore,the adsorbent showed excellent selectivity for SeO 3 2À and was able to work steadily in abroad pH range of 4-11. Density functional theory (DFT) calculation, XANES modeling,a nd EXAFS fitting suggested that SeO 3 2À anions were immobilized by forming BiÀOÀSe bonds (T-3 structural model) though splitting the O À Bi À Ob ond in the crystal structure,l eading to astructural transformation of CAU-17 in the solid state.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

show abstract

Towards a selective adsorbent for arsenate and selenite in the presence of phosphate: Assessment of adsorption efficiency, mechanism, and binary separation factors of the chitosan-copper complex

Cited by 70 publications

References 31 publications

Sewage Polluted Water Treatment via Chitosan: A Review

Sewage Polluted Water Treatment via Chitosan: A Review

Influence of organic matter and CO2 supply on bioremediation of heavy metals by Chlorella vulgaris and Scenedesmus almeriensis in a multimetallic matrix

Selective Capture of Toxic Selenite Anions by Bismuth‐based Metal–Organic Frameworks

Contact Info

Product

Resources

About