Facile synthesis of new amino-functionalized agrogenic hybrid composite clay adsorbents for phosphate capture and recovery from water

Unuabonah, Emmanuel I.; Agunbiade, Foluso O.; Alfred, Moses O.; Adewumi, Adeniyi T.; Okoli, Chukwunonso Peter; Omorogie, Martins O.; Akanbi, Moses O.; Ofomaja, Augustine E.; Taubert, Andreas

doi:10.1016/j.jclepro.2017.06.160

Cited by 45 publications

(22 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, many groups have studied a diverse pool of natural (waste) products such as coconut shells, fruit seeds (grapes, pomegranate, date palm), olive and peach stones, wood wastes, pine cones, and more for the fabrication of ACs [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. Other studies include composites of clay and carbonaceous materials [ 6 , 21 , 22 , 23 ]. For example, Okman and Karagöz et al [ 10 ] chemically activated grape seeds with potassium carbonate and potassium hydroxide before carbonization between 600 and 800 °C, resulting in materials with BET surface areas of up to 1238 m 2 /g (K 2 CO 3 ) and 1222 m 2 /g (KOH).…”

Section: Introductionmentioning

confidence: 99%

Carbon Adsorbents from Spent Coffee for Removal of Methylene Blue and Methyl Orange from Water

et al. 2021

Self Cite

View full text Add to dashboard Cite

Activated carbons (ACs) were prepared from dried spent coffee (SCD), a biological waste product, to produce adsorbents for methylene blue (MB) and methyl orange (MO) from aqueous solution. Pre-pyrolysis activation of SCD was achieved via treatment of the SCD with aqueous sodium hydroxide solutions at 90 °C. Pyrolysis of the pretreated SCD at 500 °C for 1 h produced powders with typical characteristics of AC suitable and effective for dye adsorption. As an alternative to the rather harsh base treatment, calcium carbonate powder, a very common and abundant resource, was also studied as an activator. Mixtures of SCD and CaCO3 (1:1 w/w) yielded effective ACs for MO and MB removal upon pyrolysis needing only small amounts of AC to clear the solutions. A selectivity of the adsorption process toward anionic (MO) or cationic (MB) dyes was not observed.

show abstract

Section: Introductionmentioning

confidence: 99%

Carbon Adsorbents from Spent Coffee for Removal of Methylene Blue and Methyl Orange from Water

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Adsorption capacity of calcined LDH decreased by about 50% over 5 cycles which was attributed to destruction of the layered structure (Sun et al., 2014). The structure or active sites of amino-functionalized clay adsorbent composites was considered damaged during regeneration with NaOH (Unuabonah et al., 2017). This led to a decrease in adsorption performance over every consecutive adsorption cycle (Drenkova-Tuhtan et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

Adsorption as a technology to achieve ultra-low concentrations of phosphate: Research gaps and economic analysis

Korving²,

et al. 2019

View full text Add to dashboard Cite

Eutrophication and the resulting formation of harmful algal blooms (HAB) causes huge economic and environmental damages. Phosphorus (P) from sewage effluent and agricultural run-off has been identified as a major cause for eutrophication. Phosphorous concentrations greater than 100 μg P/L are usually considered high enough to cause eutrophication. The strictest regulations however aim to restrict the concentration below 10 μg P/L. Orthophosphate (or phosphate) is the bioavailable form of phosphorus. Adsorption is often suggested as technology to reduce phosphate to concentrations less than 100 and even 10 μg P/L with the advantages of a low-footprint, minimal waste generation and the option to recover the phosphate. Although many studies report on phosphate adsorption, there is insufficient information regarding parameters that are necessary to evaluate its application on a large scale. This review discusses the main parameters that affect the economics of phosphate adsorption and highlights the research gaps. A scenario and sensitivity analysis shows the importance of adsorbent regeneration and reuse. The cost of phosphate adsorption using reusable porous metal oxide is in the range of $ 100 to 200/Kg P for reducing the phosphate to ultra-low concentrations. Future research needs to focus on adsorption capacity at low phosphate concentrations, regeneration and reuse of both the adsorbent and the regeneration liquid.

show abstract

“…Xu et al [35] studied the effect of calcium addition on the transformation of sodalite to cancrinite during Bayer digestion and found it accelerated both the formation of cancrinite and the transformation of sodalite to cancrinite. Composite adsorbent materials are currently of considerable interest due to their cost-effective treatment of metal-contaminated wastewater [36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Hydroxy-Sodalite/Cancrinite Zeolites from Calcite-Bearing Kaolin for the Removal of Heavy Metal Ions in Aqueous Media

et al. 2019

View full text Add to dashboard Cite

A hydroxy-sodalite/cancrinite zeolite composite was synthesized from low-grade calcite-bearing kaolin by hydrothermal alkali-activation method at 160 • C for 6 h. The effect of calcite addition on the formation of the hydroxy-sodalite/cancrinite composite was investigated using artificial mixtures. The chemical composition and crystal morphology of the synthesized zeolite composite were characterized by X-ray powder diffraction, infrared spectroscopy, scanning electron microscopy, and N 2 adsorption/desorption analyses. The average specific surface area is around 17-20 m 2 ·g −1 , whereas the average pore size lies in the mesoporous range (19-21 nm). The synthesized zeolite composite was used as an adsorbent for the removal of heavy metals in aqueous solutions. Batch experiments were employed to study the influence of adsorbent dosage on heavy metal removal efficiency. Results demonstrate the effective removal of significant quantities of Cu, Pb, Ni, and Zn from aqueous media. A comparative study of synthesized hydroxy-sodalite and hydroxy-sodalite/cancrinite composites revealed the latter was 16-24% more efficient at removing heavy metals from water. The order of metal uptake efficiency for these zeolites was determined to be Pb > Cu > Zn > Ni. These results indicate that zeolite composites synthesized from natural calcite-bearing kaolin materials could represent effective and low-cost adsorbents for heavy metal removal using water treatment devices in regions of water shortage.

show abstract

Facile synthesis of new amino-functionalized agrogenic hybrid composite clay adsorbents for phosphate capture and recovery from water

Cited by 45 publications

References 62 publications

Carbon Adsorbents from Spent Coffee for Removal of Methylene Blue and Methyl Orange from Water

Carbon Adsorbents from Spent Coffee for Removal of Methylene Blue and Methyl Orange from Water

Adsorption as a technology to achieve ultra-low concentrations of phosphate: Research gaps and economic analysis

Synthesis of Hydroxy-Sodalite/Cancrinite Zeolites from Calcite-Bearing Kaolin for the Removal of Heavy Metal Ions in Aqueous Media

Contact Info

Product

Resources

About