Green fabrication of bentonite/chitosan@cobalt oxide composite (BE/CH@Co) of enhanced adsorption and advanced oxidation removal of Congo red dye and Cr (VI) from water

Abukhadra, Mostafa R.; Adlii, Alyaa; Bakry, Belal Mohamed

doi:10.1016/j.ijbiomac.2018.12.225

Cited by 184 publications

(55 citation statements)

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“…Over the past decades, the untreated discharge of organic dyes from various industries such as textiles, dying, tanner, pulp and paper, paint and pigments has created huge risks to the environment; over 15% of the total quantity (greater than 700 000 metric tons) of dyes produced annually is lost during manufacturing and pollutes the environment. [1][2][3] Many organic dyes such as auramine-O (AO) and methyl green (MG) can have adverse impacts on both aquatic organisms and human beings. The presence of such compounds in water can lead to mutagenicity, carcinogenicity, and the dysfunction of the kidneys, liver, brain, reproductive system and central nervous system in human beings.…”

Section: Introductionmentioning

confidence: 99%

A Bi₂WO₆/Ag₂S/ZnS Z-scheme heterojunction photocatalyst with enhanced visible-light photoactivity towards the degradation of multiple dye pollutants

et al. 2019

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Section: Introductionmentioning

confidence: 99%

A Bi₂WO₆/Ag₂S/ZnS Z-scheme heterojunction photocatalyst with enhanced visible-light photoactivity towards the degradation of multiple dye pollutants

et al. 2019

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“…Adsorption phenomenon in soils influences the complexes in soil solution and metal ion concentration hence affects translocation of metal ions in plants [15]. Soils and clays have been reported by several researchers as potential adsorbents for heavy metals as well as other pollutants [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Adsorption Properties of Tropical Soils from Awka North Anambra Nigeria for Lead and Cadmium Ions from Aqueous Media

et al. 2019

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Soils consist of various components that can influence significantly heavy metal control in the environment. Understanding the adsorption characteristic of soil is important in combating pollution problems around farming areas. This work explored the sorption characteristics and retention of Pb and Cd by soils from Isu Aniocha farming area in Anambra state, Nigeria. The influence of temperature, metal concentration, pH and time on the sequestration of Pb 2+ and Cd 2+ was evaluated by batch sorption technique. Physicochemical properties of the soil were determined by standard techniques. Isotherm evaluation was performed by the Langmuir, Tempkin and Freundlich models. Pb (II) ion showed higher adsorption characteristics on the soil than Cd (II) from the maximum uptake capacity obtained. The maximum adsorption values for Pb range from 38.46 to 47.62 mg/g, while that for Cd range from 30.30 to 41.46 mg/g. Kinetic evaluation was conducted by the application of the pseudo first order, pseudo second order and intraparticle diffusion rate equations. The best fit on metal removal on the soils was achieved with the pseudo-second order model. The results showed that soils from a farming area can be effective in decreasing heavy metals pollution, especially Pb and Cd ions from solution phase.

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“…synthesized polypyrrole nanofiber/Zn‐Fe layered double hydroxide nanocomposites for the safranin dye removal. Abukhadra et al . investigated Cr 6+ and Congo red dye removal by using bentonite/chitosan@cobalt oxide composite.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Mohamed et al 2 synthesized polypyrrole nanofiber/Zn-Fe layered double hydroxide nanocomposites for the safranin dye removal. Abukhadra et al 3 investigated Cr 6+ and Congo red dye removal by using bentonite/chitosan@cobalt oxide composite. Hsu et al 4 used sulfur-containing activated carbon to absorb aqueous Hg from actual lime-based wet flue gas desulfurization wastewater.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Ag‐modified TiO₂ nanotube and its application in photocatalytic degradation of dyes and elemental mercury

Tsai

Liu

Hsi

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND The non‐modified titanium dioxide (TiO2) nanotube (TNT) and silver (Ag)‐modified TNT samples were fabricated via an alkaline hydrothermal process. The synthesized samples had a high Brunauer–Emmett–Teller surface area since the resulted TNT was free of calcination, which is different from the traditional synthesized method. The specific surface area of non‐modified TNT and Ag‐modified TNT samples were 392 and 330 m2 g−1, respectively. RESULTS The results indicated that anatase phase, cubic silver chloride (AgCl) and Ag co‐existed in the Ag‐modified TNT sample. In contrast, non‐modified TNT sample has only anatase phase. The OH groups, pre‐adsorbed water, and oxygen vacancies can be found on the surface of all samples. The Ag‐modified TNT sample showed to have higher removal efficiencies than that of non‐modified TNT sample for gas‐phase elemental mercury, carcinogenic malachite green, crystal violet and mixtures of dyes. CONCLUSION Although specific surface area of non‐modified TNT was larger than that of Ag‐modified TNT, the Ag‐modified TNT possessed a high‐performance photocatalyst due to the electron‐hole pairs separation efficiency increase. © 2019 Society of Chemical Industry

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Green fabrication of bentonite/chitosan@cobalt oxide composite (BE/CH@Co) of enhanced adsorption and advanced oxidation removal of Congo red dye and Cr (VI) from water

Cited by 184 publications

References 81 publications

A Bi₂WO₆/Ag₂S/ZnS Z-scheme heterojunction photocatalyst with enhanced visible-light photoactivity towards the degradation of multiple dye pollutants

A Bi₂WO₆/Ag₂S/ZnS Z-scheme heterojunction photocatalyst with enhanced visible-light photoactivity towards the degradation of multiple dye pollutants

Adsorption Properties of Tropical Soils from Awka North Anambra Nigeria for Lead and Cadmium Ions from Aqueous Media

Synthesis of Ag‐modified TiO₂ nanotube and its application in photocatalytic degradation of dyes and elemental mercury

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Green fabrication of bentonite/chitosan@cobalt oxide composite (BE/CH@Co) of enhanced adsorption and advanced oxidation removal of Congo red dye and Cr (VI) from water

Cited by 184 publications

References 81 publications

A Bi2WO6/Ag2S/ZnS Z-scheme heterojunction photocatalyst with enhanced visible-light photoactivity towards the degradation of multiple dye pollutants

A Bi2WO6/Ag2S/ZnS Z-scheme heterojunction photocatalyst with enhanced visible-light photoactivity towards the degradation of multiple dye pollutants

Adsorption Properties of Tropical Soils from Awka North Anambra Nigeria for Lead and Cadmium Ions from Aqueous Media

Synthesis of Ag‐modified TiO2 nanotube and its application in photocatalytic degradation of dyes and elemental mercury

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A Bi₂WO₆/Ag₂S/ZnS Z-scheme heterojunction photocatalyst with enhanced visible-light photoactivity towards the degradation of multiple dye pollutants

A Bi₂WO₆/Ag₂S/ZnS Z-scheme heterojunction photocatalyst with enhanced visible-light photoactivity towards the degradation of multiple dye pollutants

Synthesis of Ag‐modified TiO₂ nanotube and its application in photocatalytic degradation of dyes and elemental mercury