Adsorption of organic pollutants onto a Romanian soil: Column dynamics and transport

Smaranda, Camelia; Popescu, Maria-Cristina; Bulgariu, Dumitru; Măluțan, Teodor

doi:10.1016/j.psep.2016.06.027

Cited by 35 publications

(15 citation statements)

References 42 publications

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“…The adsorption of pollutants on soil is an important environmental behavior. The physical and chemical properties of the soil determine the migration and fate of pollutants in the environment, and the feasibility of contaminated soil remediation technologies (Ahmed et al, 2018;Smaranda et al, 2016). Among the heavy metals and organic pollutants, cadmium and atrazine are the most common pollutants in soils (Duan et al, 2016;Yang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Adsorption characteristics of atrazine on different soils in the presence of Cd(II)

Sun

Lan

Wang

et al. 2020

Adsorption Science & Technology

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In this study, the effects of temperature, pH, and biochar under cadmium stress on the adsorption characteristics of atrazine in soils in northeast China were studied by batch adsorption method. In the atrazine–Cd(II) coexistence system, the adsorption of atrazine by the soils reached equilibrium within 24 h, but there were some differences in sorption capacities of the three types of soil and the order of adsorption is albic soil > black soil > saline-alkaline soil. With the concentration of atrazine increased, the adsorption capacity of atrazine in the three types of soil gradually increased, the upward trend became more obvious with the ambient temperature of the solution decreased. The adsorption kinetics curves of atrazine in the three types of soil conform to the pseudo-second-order kinetic model and the adsorption isotherm follows the Langmuir model. When atrazine and Cd(II) coexist in soils, the decrease in atrazine adsorption in the soil may be due to the competitive interaction between the two chemicals. Cd(II) occupies part of the adsorption site of atrazine, thus saturating the active site in soils. Since atrazine is a weakly alkaline pesticide, the lower the pH of the soil, the higher the affinity of atrazine for the soil. After adding biochar to the soil, the functional groups in biochar can form π bond with atrazine, which promotes the fixation of atrazine in the soil. The results show that the prevention of atrazine and cadmium leaching can be achieved by appropriately adjusting the pH, temperature, clay content, and organic matter of the soils.

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Section: Introductionmentioning

confidence: 99%

Adsorption characteristics of atrazine on different soils in the presence of Cd(II)

Sun

Lan

Wang

et al. 2020

Adsorption Science & Technology

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“…In recent years, many authors are interested in the synthesis of the adsorbents powdered and granulated goepolymer for removing the organic pollutants from aqueous media and wastewaters by the adsorption method [14][15][16]. The batch and column adsorption of organic pollutants from aqueous solutions by goepolymer has been studied by various scientists [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of cationic dye onto fly ash-based geopolymer: Batch and fixed bed column studies

et al. 2018

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Abstract. Cationic dye adsorption from aqueous solution onto synthesized geopolymer was investigated by batch and fixed bed column experiments. The geopolymer material was elaborated by alkali solution and fly ash supplied by Jorf Lasfar power plant of Morocco. Physical and chemical characteristics of samples were determined by FX, DRX, SEM, 29 Si MAS NMR and Zeta potential methods. The Brunauer, Emmett and Teller (BET) technique is used to determine the surface area. The Barrett-Joyner-Halenda (BJH) method was performed to obtain pore size distribution curves and average pore diameter. Kinetics data were analyzed using pseudo-first-order, pseudo-second-order and intraparticle diffusion models. To predict the breakthrough curves and determine the main fixed bed column parameters, three kinetic models; Tomas, Bohart-Adams and YoonNelson models are applied to fitting the experimental data. The kinetic study showed that the pseudo-secondorder can be used to describe the methylene blue (MB) adsorption process on the geopolymer matrix. The kinetic models of the adsorption in dynamic column are suitable to describe the continuous adsorption process of dyestuff by the geopolymer. The results of this study indicated that geopolymer derived from fly ash can be used as a low cost effective adsorbent for cationic dye removal from industrial aqueous effluent.

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“…In order to evaluate some characteristic biosorption parameters in a dynamic biosorption system, the experimental data were processed using two of the most well-known models from the scientific literature, i.e., the Thomas and Yoon-Nelson kinetic models [27,[32][33][34]. These selected models were applied for the investigated biosorption system; the removal BRed dye using a fixed/packed bed of immobilized residual biomass operating in a continuous dynamic regime.…”

Section: Modeling Of Experimental Biosorption Data In Dynamic Regimementioning

confidence: 99%

Brilliant Red HE-3B Dye Biosorption by Immobilized Residual Consortium Bacillus sp. Biomass: Fixed-Bed Column Studies

et al. 2021

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Residual biomass from various industries represents an important source of valuable compounds, used as raw materials for the production of a wide range of new products and also in various treatment and valorization processes or/and sanitation services, thus responding to the principles of sustainable development, waste recovery, and a green and circular economy. The aim of this work is to make use of residual Bacillus sp. biomass (resulting from a process of removing fatty acids from municipal wastewater) immobilized in alginate that, although it results in large quantities from biotechnological processes, is not reported to be valorized in dye biosorption processes, except in few specific applications. The biosorption potential of residual Bacillus sp. biomass in the reactive Brilliant Red HE-3B textile dye removal from aqueous systems was studied in a fixed-bed column. The effects of various experimental operating parameters, such as bed depth (h), flow rate (Fv), were investigated, and the modeling of experimental data based on Thomas and Yoon–Nelson kinetic models was satisfactorily achieved. The obtained results reconfirm that the studied residual biomass can be also considered as a good biosorbent in dynamic operating system, and can be beneficially used in the treatment of wastewater containing small quantities of organic dyes.

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Adsorption of organic pollutants onto a Romanian soil: Column dynamics and transport

Cited by 35 publications

References 42 publications

Adsorption characteristics of atrazine on different soils in the presence of Cd(II)

Adsorption characteristics of atrazine on different soils in the presence of Cd(II)

Adsorption of cationic dye onto fly ash-based geopolymer: Batch and fixed bed column studies

Brilliant Red HE-3B Dye Biosorption by Immobilized Residual Consortium Bacillus sp. Biomass: Fixed-Bed Column Studies

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