Innovative use of silvichemical biomass and its derivatives for heavy metal sorption from wastewater

Yu, Hong; Covey, Geoff; O’Connor, Andrea J.

doi:10.1504/ijep.2008.020808

Cited by 11 publications

(1 citation statement)

References 103 publications

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“…Furthermore, the ζ potentials of the particles in HA suspensions were comparable to those in Milli-Q water suspensions, but particles in HA suspensions exhibited higher stability. This may be attributed to the electrosteric repulsion forces (i.e., a combination of steric forces and electrostatic forces) resulting from the adsorption of HA on the particles − as compared to purely charge-driven stabilization (electrostatic) in the case of Milli-Q water suspensions …”

Section: Discussionmentioning

confidence: 99%

Characterization and Potential Environmental Implications of Select Cu-Based Fungicides and Bactericides Employed in U.S. Markets

Tegenaw

Tolaymat

Al-Abed

et al. 2015

Environ. Sci. Technol.

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This exploratory study aimed to examine the extent and mineral speciation of nanosized Cu in two fungicide products (A and B) available in the U.S. markets. Electron microcopy results demonstrated the presence of spherical and polydisperse <100 nm Cu particles in product B. Other elements (e.g., Pb, Na, Ca, and S) were found in both products. Mineral speciation analysis indicated the dominance of spertiniite followed by cornetite and then malachite in product A. In product B, spertiniite and tenorite were the dominant Cu species followed by cornetite and malachite. Tenorite in product B (∼30%, <450 nm) has the potential for stronger toxicological impacts relative to those of other Cu minerals in the tested products. For both products, the particle hydrodynamic diameter was impacted by changes in environmental parameters (pH, ionic strength, and background electrolyte) in Milli-Q water and humic acid suspensions. However, a minimal impact was observed in polyvinylpyrrolidone suspensions. The findings are critically important for estimating the fate and transport of Cu particles in different environmental scenarios as well as allowing a more accurate assessment of their risk that is largely impacted by chemical speciation and size.

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Section: Discussionmentioning

confidence: 99%

Characterization and Potential Environmental Implications of Select Cu-Based Fungicides and Bactericides Employed in U.S. Markets

Tegenaw

Tolaymat

Al-Abed

et al. 2015

Environ. Sci. Technol.

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Green Carbon

Titirici¹

2013

Sustainable Carbon Materials From Hydrothermal Processes

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Use of activated dry flowers (ADF) of Alstonia Scholaris for chromium (Vl) removal: equilibrium, kinetics and thermodynamics studies

Sharma

Kothiyal

2013

Environ Sci Pollut Res

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In this study, a natural adsorbent (activated dry flowers (ADF)) was prepared from plant-derived waste biomass by chemical activation and employed for chromium (VI) removal from aqueous medium using experimental batch technique. Experiments were carried out as function of adsorbent dosage, pH, and contact time. The maximum chromium (Vl) removal was observed at initial pH 3 (~94 % removal). The equilibrium data was fitted well to Langmuir isotherm. The adsorption capacity of ADF was found to be 4.40 (mg chromium (Vl)/g) which was comparable to the adsorption capacity of some other adsorbents documented. Among various kinetic models applied, pseudo second-order model was found to explain the kinetics of chromium (VI) adsorption most effectively (R (2) >0.99). Thermodynamic parameters such as ΔG, ΔS, and ΔH shows that adsorption process was spontaneous and endothermic at all the concentration ranges studied. Desorption of chromium (Vl) with 2 N NaOH was effective (~71 %) and, hence, there exists the possibility of recycling the ADF. The major advantages of using ADF as an adsorbent are due to its effectiveness in reducing the concentration of chromium (Vl) to very low levels. It requires little processing and is reversible as well as eco-friendly in contrast to traditional methods.

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Innovative use of silvichemical biomass and its derivatives for heavy metal sorption from wastewater

Cited by 11 publications

References 103 publications

Characterization and Potential Environmental Implications of Select Cu-Based Fungicides and Bactericides Employed in U.S. Markets

Characterization and Potential Environmental Implications of Select Cu-Based Fungicides and Bactericides Employed in U.S. Markets

Green Carbon

Use of activated dry flowers (ADF) of Alstonia Scholaris for chromium (Vl) removal: equilibrium, kinetics and thermodynamics studies

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