Liquid phase adsorption of Congo red dye on functionalized corn cobs

Ojedokun, Adedamola Titi; Bello, Olugbenga Solomon

doi:10.1080/01932691.2016.1234384

Cited by 54 publications

(52 citation statements)

References 51 publications

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“…Well-developed pores and rougher cavities in SEM of FCC are connected with loss of volatile materials especially water and breakdown of cellulosic materials resulting in well-built cavities coupled with gasification of phosphorus species impregnated with H 3 PO 4 in FCC leading to the expansion of pores. These results are consistent with reports that expansion of porousity is related to amount of phosphorus [29,30,[35][36][37]. Since adsorption process is a surface occurrence, adsorbent quality will be functions of number and nature of pores [41,42].…”

Section: Morphological and Elemental Characteristics Of CC Fcc And Ccncsupporting

confidence: 92%

“…Since adsorption process is a surface occurrence, adsorbent quality will be functions of number and nature of pores [41,42]. As obtained for SEM in this study, it indicates CCNC had best qualities for uptake of MO as it has been previously reported that rough surfaces with developed cavities are more favourable for adsorption of pollutants [29,49]. EDX analysis was used to reveal elemental compositions and percentages of prominent elements present in the three adsorbents ( Table 2).…”

Section: Morphological and Elemental Characteristics Of CC Fcc And Ccncsupporting

confidence: 53%

“…Another method of enhancing the adsorptive capacity of adsorbent is activation/functionalization with acids, alkali and salts. This majorly modifies the biological structure, cleaves the bond, influences pyrolytic decomposition, improves thermal resistance and inhibits tar formation [28][29][30]. Acid functionalization with H 3 PO 4 induces physical, and chemical modification, reforms formation of cross-linked structure, develops micropores, enhances surface adsorptive properties by increasing their percentage carbon contents via reduction of water content and burning-off of volatile solids arising from breakage of cellulosic materials [31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

“…It is an inexpensive and environmentally friendly effective adsorbent which has been applied to remediate heavy metals, dyes, and crude-oil polluted water. It has also found application in the reinforcement of polyvinyl alcohol membrane [11,29,38].…”

Section: Introductionmentioning

confidence: 99%

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Nanostructured and surface functionalized corncob as unique adsorbents for anionic dye remediation

et al. 2020

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This study describes synthesis and characterization of corncob (CC), corncob nanocellulose (CCNC) and functionalized corncob (FCC) as unique adsorbents for methyl orange (MO) removal. Nanocellulose was synthesized via H 2 SO 4 hydrolysis and functionalization was achieved using H 3 PO 4 . All adsorbents were characterized by scanning electron microscopy coupled with energy dispersive X-ray and Fourier transform infra-red spectroscopy. Functionalization modified surface chemistry (disappearance of OH and appearance of PO 4 3− ), increased percentage carbon by 41.42% and produced welldeveloped pores. Nanocellulose retained intrinsic chemical properties of corncob though more porous with enhanced surface functionality prompted by more intense functional groups peaks and appearance of SO 4 2− . Maximum adsorption of MO occurred at pH 3.01, 4.11 and 2.09 for CC (54.34%), FCC (77.1%) and CCNC (96.81%) respectively. Adsorption parameters were fitted to four adsorption isotherms with Langmuir being the most appropriate to describe the adsorption process. Adsorption capacity increased from 17.86 mg g −1 in corncob to 60.82 mg g −1 in FCC and 206.67 mg g −1 in CCNC implying CCNC had the highest adsorption quality. The rate of adsorption was most accurately predicted by pseudo first order kinetics. Adsorption mechanism was governed by film diffusion with contribution from intra-particle diffusion. Adsorption process was spontaneous (− ∆G o ) at all temperatures (303-315 K), exothermic (− ∆H o ) and physical on CC (3.73 kJ mol −1 ) and CCNC (3.42 kJ mol −1 ) however it was endothermic (+ ∆H o ) and chemical on FCC (12.86 kJ mol −1 ). This study shows that CCNC is comparatively the best adsorbent with highest adsorption capacity.

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Section: Morphological and Elemental Characteristics Of CC Fcc And Ccncsupporting

confidence: 92%

Section: Morphological and Elemental Characteristics Of CC Fcc And Ccncsupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nanostructured and surface functionalized corncob as unique adsorbents for anionic dye remediation

et al. 2020

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“…These non‐conventional adsorbents include bacterial, algal, and fungal biomass . Other low‐cost adsorbents have been prepared from sunflower stalks, maize cob and husk, shea butter seed husk, cassava waste, white star apple, saw dust‐carbon, sago waste, rice husk, peanut hull, walnut, lignite, sugarcane bagasse cellulose, sheep bone, and many others.…”

Section: Purification Of Mercury‐containing Wastewater Using Low‐costmentioning

confidence: 99%

Trapping Ionic Mercury Using Different Adsorbents

Ojedokun

Oluwole

Bello

2019

CLEAN Soil Air Water

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Of recent, adsorption process has gained a lot of attention as a cheap and effective means of removing trace metals from wastewater prior to discharge into water bodies. Being flexible in design and operation, the process has enabled an optimal recovery of trace metals such that the treated effluents meet the desired standards for waste disposal. Mercury is a toxicant released into the environment from natural and anthropogenic sources. It is notorious for having an unusual tendency to bio‐accumulate and persist in the food chain. Presence of mercury in food, especially those of aquatic sources has drastic implications on human health. Therefore, efforts have been made to develop and optimize low‐cost activated carbon (AC) as adsorbents for scavenging mercury from aqueous effluents. Herein, how mercury accumulates across the food chain, its health implications, and the recent advancement in the use of low‐cost ACs as adsorbent for trapping mercury from wastewater are highlighted. Relationship between the mercury removal efficiency and the surface morphology of the adsorbents as well as the influence of prevailing experimental condition on the sorption process were addressed. Challenges and future prospects of the use of low‐cost adsorbents in addressing mercury pollution in the environment are discussed.

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Effect of Corncob Derived Biochar on Microbial Electroremediation of Dye Wastewater and Bioenergy Generation

et al. 2020

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This paper describes the potential of waste biomass derived biochar for improvement in the dye wastewater treatment in a microbial fuel cell (MFC). The complete MFC, an energy generating unit, was made with the waste products in order to demonstrate that low cost alternatives are available to replicate the positive results. Waste corncob derived biochar produced after acid modification has been evaluated as a supplement in an MFC for treatment of real dye wastewater (RDW). The two doses of sulfuric acid modified corncob biochar (SA‐MCB), (0.5 g and 1 g) and a blank (without any dose) were assessed for the effect on MFC performance. The maximum power density (49.92 W/m2), current density (0.28 A/m2), COD removal efficiency (88.39%), decolorization efficiency (81.6%) and TDS reduction (84.4%) were obtained with 0.5 g biochar dose. The Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) analysis revealed the structural changes occurring on the SA‐MCB after use in the MFC. The SEM analysis revealed the better biofilm formation due to SA‐MCB deposition. Power density with 0.5 g of SA‐MCB dose improved to more than 24 times in comparison to the system without any such dose. The UV spectrophotometer analysis confirmed the azo bond deformation during treatment. The overall results suggest that the use of SA‐MCB biochar as anode material and as a supplement in the MFC system may provide an effective anode‐biofilm in MFCs for wastewater treatment.

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Liquid phase adsorption of Congo red dye on functionalized corn cobs

Cited by 54 publications

References 51 publications

Nanostructured and surface functionalized corncob as unique adsorbents for anionic dye remediation

Nanostructured and surface functionalized corncob as unique adsorbents for anionic dye remediation

Trapping Ionic Mercury Using Different Adsorbents

Effect of Corncob Derived Biochar on Microbial Electroremediation of Dye Wastewater and Bioenergy Generation

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