Adsorptive removal of 2,4,6-trichlorophenol in aqueous solution using calcined kaolinite-biomass composites

Olu-Owolabi, Bamidele I.; Alabi, Alimoh H.; Diagboya, Paul N.; Unuabonah, Emmanuel I.; Düring, Rolf‐Alexander

doi:10.1016/j.jenvman.2017.01.055

Cited by 72 publications

(27 citation statements)

References 17 publications

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“…This was evident from the Chi-square (χ 2 ) and ∆q (%) values, which ranged between 0.01-0.05 for the case of the former and 0.52-1.14% for the case of the latter. Thus, the investigational results indicate that the PSO appears to be a better fit for TCP biosorption on PCP, which is similar to the recent investigations, have shown that the kinetics of TCP adsorption onto other adsorbents also followed PSO kinetic models [21,42,52].…”

Section: Intraparticle Diffusion Modelsupporting

confidence: 88%

Equilibrium and Kinetic Studies of Biosorptive Removal of 2,4,6-Trichlorophenol from Aqueous Solutions Using Untreated Agro-Waste Pine Cone Biomass

et al. 2019

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The present work discusses the adsorptive removal of a phenolic pollutant, i.e., 2,4,6-trichlorophenol (TCP), using low cost untreated agricultural waste pine cone powder (PCP). The present biosorbent was thoroughly characterized with the help of FTIR, SEM, XRD, and CHN analysis. The presence of amine (-NH 2 ), hydroxyl (-OH) and carbonyl (C=O) functional groups was detected by the FTIR analysis. The important biosorption factors like agitation time, biomass dosage, initial adsorbate concentration, and the initial pH were examined by batch studies. The biosorption kinetic process was fast, reaching equilibrium in 75 min. The experimental kinetic data revealed an excellent agreement with the pseudo second order (PSO) model. On the other hand, the Langmuir isotherm model best described the equilibrium data with the maximum biosorption capacity (q max ) of 243.90 mg/g. These values are better than the adsorption capacities of most agro-based untreated adsorbents previously reported in the literature. Owing to fast removal rates and high biosorption capacity, PCP can be used for cost-effective treatment of TCP from aqueous streams.Processes 2019, 7, 757 2 of 17 to develop cost-effective treatment strategy for the contaminated waste-water prior to release into the environment.The elimination of organic contaminants from the waste-water effluents using various methods like physical (membrane filtration, adsorption, biosorption and solvent extraction), chemical-biological oxidation, electrochemical oxidation, photocatalytic degradation, microbial degradation, ion exchange resins, catalytic oxidation, advanced oxidation processes have been proposed in the recent literature [9][10][11][12]. Among these techniques, the biosorption using various agricultural wastes has been thoroughly investigated for the elimination of organic contaminants and heavy metals from the standpoint of cost-effectiveness and eco-friendly considerations [13][14][15][16][17]. Several studies proved biosorption is a simple yet effective method for the elimination of pollutants, in which the significant factor is the utilization of agricultural wastes. Many authors highlighted the fact that the biosorption of phenol and phenolic derivatives using lignocellulosic residues and agricultural by-products do not require recycling and regeneration studies due to their low-cost and abundant availability in nature [2,[18][19][20][21].Pine trees annually produce large amounts of pine cones as an agricultural waste. Each cone consists of an axis, which is composed of several woody scales arranged in a spiral fashion. These scales comprise of epidermal and a sclerenchyma cell, which is mainly composed of lignin, tannins, and rosin etc. besides cellulose and hemicelluloses in their cell wall structures [22]. Pine cone biomass have newly used for removing heavy metals, dyes, and phenols from aqueous media [23][24][25][26][27][28]. However, its use for removing chlorophenols from contaminated wastewater has not yet been reported in the literature.Despite being a co...

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Section: Intraparticle Diffusion Modelsupporting

confidence: 88%

Equilibrium and Kinetic Studies of Biosorptive Removal of 2,4,6-Trichlorophenol from Aqueous Solutions Using Untreated Agro-Waste Pine Cone Biomass

et al. 2019

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“…Further, the FTIR spectra of DSF‐MM almost overlapped those of the control, Con‐DSF [Figure (b)], indicating good dispersibility of MM in the DSF adhesive. The filler KL had one main absorption peak at approximately 1045 cm −1 , which is attributed to in‐plane stretching of SiO . The IR spectrum of DSF‐KL was also quite similar to that of Con‐DSF except the peak absorption of SiO stretching shifted from 1045 to 1035 cm −1 due to the intercalation of KL by the DSF adhesive.…”

Section: Resultsmentioning

confidence: 83%

Effects of inorganic filler on performance and cost effectiveness of a soybean‐based adhesive

Chang

Sun

et al. 2019

J of Applied Polymer Sci

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A modified soybean-based adhesive with improved bonding properties and technological applicability but reduced cost was developed based on the effects of inorganic fillers on the performance of a defatted soybean meal flour (DSF) adhesive. Investigations with Fourier transform infrared spectroscopy, X-ray diffraction measurement, thermogravimetric analysis, scanning electron microscopy, rheology tests, zeta potential analysis, and plywood evaluation demonstrated that adding inorganic fillers could improve the technological applicability of the adhesive by alleviating shear thinning and decreasing the viscosity up to 71.2%, reduce the adhesive cost up to 9.5% and result in various effects on bonding properties. Two fillers, montmorillonoid and kaolin, were suitable for plywood for exterior use owing to significantly improved water resistance up to 58.9% resulting from penetration of DSF/crosslinker chains into the interlayers of the silicates via intercalation, stable chemical bonds between the fillers and crosslinker, and excellent compatibility between the filler particles and DSF adhesive.Recently, adhesives based on defatted soybean meal flour (DSF) are commonly composed of DSF and epichlorohydrin-modified polyamide (EMPA) solution (as either a crosslinker or a disperser); the two components are stored separately but mechanically blended at room temperature to formulate the adhesive immediately before use. According to the latest market costs (November, 2019) of the EMPA solution (approximately 370 USD/ton) and DSF (approximately 700 USD/ton), this DSF-based adhesive costs approximately 480 USD/ton, which is 29.7% more than adhesives containing the dominant urea-formaldehyde resin (approximately 370 USD/ton). The higher cost results in poor market competition, limiting wide application in wood composites.

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“…pseudo-first kinetic: ln(qe − qt) = ln qe − k1 t (2) pseudo-second kinetic: t/qt = 1/k2 qe 2 + t/qe (3) where qe and qt (mg g −1 ) was the removal capacity of TCP at time t (min) and equilibrium, respectively. k1 (min −1 ) and k2 (g mg −1 min −1 ) was the equilibrium rate constant of both kinetic models [28,29].…”

Section: Adsorption Performancementioning

confidence: 99%

“…Chlorophenols are a class of typical organic contaminants that have been utilized widely in various industrial and agricultural fields. Specifically, 2,4,6-trichlorphenol (TCP) has been listed among United States Environmental Protection Agency (US EPA) priority pollutants due to its high toxicity, mutagenicity, and carcinogenicity [1,2]. Various methods such as photodegradation, chemical reduction and adsorption have been developed to remove chlorophenols from contaminated water [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Adsorptive and Reductive Removal of Chlorophenol from Wastewater by Biomass-Derived Mesoporous Carbon-Supported Sulfide Nanoscale Zerovalent Iron

et al. 2019

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Chlorinated compounds in a water environment pose serious threats to humanity. A nanoscale zerovalent iron (nZVI) has desirable properties for water dichlorination, but its reactivity is still limited by agglomeration and oxidation. In this study, the mesoporous carbon (MC) derived from biomass waste was prepared for immobilizing nZVI, and the nZVI@MC was further modified by sulfur (S-nZVI@MC) to relieve surface oxidation. The synergistic effect between nZVI and surface modification, the reaction conditions and the removal mechanism were investigated systematically. The characterization results showed nZVI was successfully loaded on the surface of MC, and the aggregation of nZVI was prevented. Moreover, sulfidation modification resulted in the formation of FeS on the surface of nZVI, which effectively alleviated surface oxidation of nZVI and promoted the electron transfer. Batch experiments demonstrated S-nZVI@MC had greatly enhanced reactivity towards 2,4,6-trichlorphenol (TCP) as compared to MC and nZVI, and the removal rate could reach 100%, which was mainly attributed to the significant synergistic effect of MC immobilization and sulfidation modification. Furthermore, the TCP removal process was well described by a Langmuir adsorption model and pseudo-second-order model. The possible mechanism for enhanced removal of TCP is the fast adsorption onto S-nZVI@MC and effective reduction by S-nZVI. Therefore, with excellent reducing activity and antioxidation, S-nZVI@MC has the potential as a pollutant treatment.

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Adsorptive removal of 2,4,6-trichlorophenol in aqueous solution using calcined kaolinite-biomass composites

Cited by 72 publications

References 17 publications

Equilibrium and Kinetic Studies of Biosorptive Removal of 2,4,6-Trichlorophenol from Aqueous Solutions Using Untreated Agro-Waste Pine Cone Biomass

Equilibrium and Kinetic Studies of Biosorptive Removal of 2,4,6-Trichlorophenol from Aqueous Solutions Using Untreated Agro-Waste Pine Cone Biomass

Effects of inorganic filler on performance and cost effectiveness of a soybean‐based adhesive

Adsorptive and Reductive Removal of Chlorophenol from Wastewater by Biomass-Derived Mesoporous Carbon-Supported Sulfide Nanoscale Zerovalent Iron

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