Biosorption of reactive dyes on the green alga Chlorella vulgaris

Aksu, Zümríye; Tezer, Sevilay

doi:10.1016/j.procbio.2004.06.007

Cited by 469 publications

(232 citation statements)

References 28 publications

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“…The optimum value should be established for each and every case. Similar results, consistent with the sorption/reaction column operational characteristics, have been reported by other researchers (Aksu and Tezer, 2005;Pamukoglu and Kargi, 2007) who studied the effect of flow rates on different types of reaction yields occurring in fixed-bed flow-through columns. At lower feed flow rates, reactions inside the column were not limited by contact time and the reagent (nanoiron in our case) had more time to react with the contaminant (RDX in the soil solid phase) resulting in a higher overall removal of RDX from the column fill (Naja and Volesky, 2007).…”

Section: Dynamic Study Of the Rdx Chemical Degradation Reaction Usingsupporting

confidence: 91%

Dynamic and equilibrium studies of the RDX removal from soil using CMC-coated zerovalent iron nanoparticles

Naja

Apiratikul

Pavasant

et al. 2009

Environmental Pollution

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RDX chemical degradation in a contaminated soil was conducted using coated zerovalent iron nanoparticles in both batchRapid chemical degradation of toxic RDX explosive in soil can be accomplished using zerovalent nanoiron suspension stabilized in dilute carboxymethyl cellulose solution (CMC-ZVINs). The effect of operating conditions (redox-potential, Fe/RDX molar ratio) was studied on batchwise removal of RDX in contaminated soil. While anaerobic conditions resulted in 98% RDX removal in 3 h, only slightly over 60% RDX removal could be attained under aerobic conditions. The molar ratio did not have any influence on the intermediate and final RDX degradation products (methylenedinitramine, nitroso derivative, N 2 ,N 2 O, NO 2 À ), however, their distribution changed. Dynamic studies were conducted using a flow-through short column packed with RDX-contaminated soil and fed with CMC-ZVINs. The column was operated at two interstitial velocities (2.2 and 1.6 cm min À1 ), resulting in the 76.6% and 95% removal of the initial RDX soil contamination load (60 mg kg À1 ), respectively. While the column operating conditions could be further optimized, 95% of the RDX initially present in the contaminated soil packed in the column was degraded when flushed with a CMC-ZVINs suspension in this work.

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Section: Dynamic Study Of the Rdx Chemical Degradation Reaction Usingsupporting

confidence: 91%

Dynamic and equilibrium studies of the RDX removal from soil using CMC-coated zerovalent iron nanoparticles

Naja

Apiratikul

Pavasant

et al. 2009

Environmental Pollution

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“…In addition, the proteins were mainly released during the preoxidation period, and prolongation of simulated transportation time did not have an obvious influence on the protein concentrations. This indicates that the further increase of protein concentrations is inhibited due to the binding function of damaged cyanobacterial cells (Aksu and Tezer, 2005). However, the further increased amino acid concentrations at fixed chlorine doses, i.e., 0.2 mg/L and 0.4 mg/L, showed that amino acids could be further released into the solution during the simulated transportation period.…”

Section: Aom Release After Prechlorination During Simulated Transportmentioning

confidence: 97%

“…This means that the serious damage to cyanobacterial cells is unfavorable for the continuous release of AOM into the dissolved phase. Damaged algal cells have been found to be potential biosorbents because of their relatively large surface area and high binding affinity to adsorb polysaccharides and proteins (Aksu and Tezer, 2005). The biosorption function of damaged algal cells can be mainly explained by the changes of cell membrane structure and the physico-chemical adsorption process on cell surface (Tsezos and Bell, 1989;Tam et al, 2002).…”

Section: Aom Release After Prechlorination During Simulated Transportmentioning

confidence: 99%

“…2). The highly damaged algal cells have the ability to accumulate organic materials via adsorption (Marungrueng and Pavasant, 2006;Salima et al, 2013), due to their relatively large surface area and the physico-chemical adsorption process on cell surface (Tsezos and Bell, 1989;Tam et al, 2002;Aksu and Tezer, 2005). The amino acid concentrations in Fig.…”

Section: Proposed Influence Pathwaymentioning

confidence: 99%

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Prechlorination of algae-laden water: The effects of transportation time on cell integrity, algal organic matter release, and chlorinated disinfection byproduct formation

Lan

Liu

et al. 2016

Water Research

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a b s t r a c tThe prechlorination-induced algal organic matter (AOM) released from Microcystis aeruginosa (M. aeruginosa) cells has been reported to serve as a source of precursors for chlorinated disinfection byproducts (DBPs). However, previous studies have mainly focused on the precursors either extracted directly from the cell suspension or derived immediately after algal suspension prechlorination. This study aims to investigate the impacts of water transportation time after algal suspension prechlorination on cell integrity, AOM release, and DBP formation during the dissolved phase chlorination. The damage to cell integrity after prechlorination was indicated to depend not only on chlorine dose but also on transportation time. The highest dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) values were observed at 2 mg/L chlorine preoxidation before transportation, but were obtained at 0.4 mg/L chlorine after 480-min simulated transportation. The variation of DON with transportation time was indicated to be mainly influenced by the small molecular weight nitrogenous organic compounds, such as amino acids. Additionally, formation of the corresponding chlorinated carbonaceous disinfection byproducts (C-DBPs) and nitrogenous disinfection byproducts (N-DBPs) during the dissolved phase chlorination showed the same variation tendency as DOC and DON respectively. The highest C-DBP (98.4 mg/L) and N-DBP (5.5 mg/L) values were obtained at 0.4 mg/L chlorine preoxidation after 480-min simulated transportation. Therefore, when prechlorination is applied for algae-laden water pretreatment, not only chlorine dose but also transportation time needs to be considered with regard to their effects on cell integrity, AOM release, and chlorinated DBP formation.

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“…From the experimental data (Table 3), it is clear that the percentage removal of dye increases from 45.27% to 91.9 % with the increase of adsorbent dosage. This may be due to the increase in effective surface area and increasing availability of active adsorption sites from the increase in adsorbent dosages 8,9 .…”

Section: Effect Of Adsorbent Dosagementioning

confidence: 99%

Equillibrium Modelling of Adsorptive Removal of Methylene Blue Using BGA

Krishnaveni¹

2012

Orientjchem.

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The removal of Methylene Blue dye from aqueous solution using a biowaste, dried Blue Green Algae was investigated in terms of variation of initial concentration of the dye solution, adsorbent dosage and pH. The optimum pH for the removal of dye by adsorption was found to be pH 7. The data obtained in this study fitted with Langmuir and Freundlich adsorption isotherms. The experimental data confirms the monolayer adsorption capacity of the adsorbent.

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Biosorption of reactive dyes on the green alga Chlorella vulgaris

Cited by 469 publications

References 28 publications

Dynamic and equilibrium studies of the RDX removal from soil using CMC-coated zerovalent iron nanoparticles

Dynamic and equilibrium studies of the RDX removal from soil using CMC-coated zerovalent iron nanoparticles

Prechlorination of algae-laden water: The effects of transportation time on cell integrity, algal organic matter release, and chlorinated disinfection byproduct formation

Equillibrium Modelling of Adsorptive Removal of Methylene Blue Using BGA

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