Enhancement of As(V) adsorption onto activated sludge by methylation treatment

Kang, Soo Yong; Kim, Dong-Wook; Kim, Kyoung-Woong

doi:10.1007/s10653-007-9096-y

Cited by 8 publications

(6 citation statements)

References 26 publications

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“…Wave numbers of the peaks corresponding with absorption bands and their characteristic shown in Table 2 were used during analyzing environmental sample’s spectra. In case of developed spectra library, other publications concerning FT-IR analysis, using similar methodology, obtained roughly the same results, and peaks were observed in very similar regions (Quilès et al 2010 ; Gulnaz et al 2006 ; Wharfe et al 2010 ; Cheftez et al 2006 ; Amir et al 2010 ; Kang et al 2007 ; Guibaud et al 2003 ).…”

Section: Resultssupporting

confidence: 68%

Qualitative analysis of activated sludge using FT-IR technique

et al. 2018

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The ability to measure and control the composition of activated sludge is an important issue, aiming at evaluating the effectiveness of changes occurring in the sludge, what determines its usefulness to treat wastewater. In this research, diffuse reflectance infrared Fourier transform (FTIR–DRIFT) technique was used, which relies on measuring the reflectance of the powdered substance’s surface layer and capturing spectra in range of infrared wave. First, spectra correlation table of the substances mostly occurring in wastewater was developed to assess the main components of the tested samples of activated sludge. The simplest compounds containing functional groups characteristic for particular chemical classes were chosen: peptides (peptone and albumin), fats (glycerin and fatty acids), carbohydrates (glucose and sucrose), nitrogen compounds (NaNO3 and NH4SO4), sulfur compounds (Na2SO4 and Na2S2O3), silicate, etc. The spectra of those substances were captured and characteristic absorption bands for respective bonds in the function groups were assigned. Second, samples of activated sludge from lab-scale membrane bioreactors (MBRs), which purifies petroleum wastewater, were taken. Samples were properly prepared (lyophilization and homogenization) and their spectra were captured. During spectra analysis, previously developed correlation table was used. In obtained spectra of activated sludge, absorption bonds characteristic for amides, peptides, carbohydrates, fats, and aliphatic was identified. The spectra profile of the sludge sample from MBR feed with petroleum wastewater was slightly different from the control MBR sample’s spectra. Intensity of bands in the area characteristic for aliphatic compounds and phenols was clearly higher. This study proves the usefulness of FT-IR technique to observe changes in the chemical composition of activated sludge.

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Section: Resultssupporting

confidence: 68%

Qualitative analysis of activated sludge using FT-IR technique

et al. 2018

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“…There was little difference in As ads (accounting for 23.5–27.7% of the total arsenic) among all assays whether the sulfate or voltage was applied or not. Interactions between arsenic and surface functional groups of sludge are considered as the primary mechanisms for arsenic adsorption . Our previous study found that the adsorption of arsenic was negatively impacted by increasing pH, ionic strength, and phosphate ions .…”

Section: Resultsmentioning

confidence: 99%

Enhancing Roxarsone Degradation and In Situ Arsenic Immobilization Using a Sulfate-Mediated Bioelectrochemical System

Tang

Prommer

Yuan

et al. 2020

Environ. Sci. Technol.

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Roxarsone (ROX) is widely used in animal farms, thereby producing organoarsenic-bearing manure/wastewater. ROX cannot be completely degraded and nor can its arsenical metabolites be effectively immobilized during anaerobic digestion, potentially causing arsenic contamination upon discharge to the environment. Herein, we designed and tested a sulfate-mediated bioelectrochemical system (BES) to enhance ROX degradation and in situ immobilization of the released inorganic arsenic. Using our BES (0.5 V voltage and 350 μM sulfate), ROX and its metabolite, 4-hydroxy-3-amino-phenylarsonic acid (HAPA), were completely degraded within 13–22 days. In contrast, the degradation efficiency of ROX and HAPA was <85% during 32-day anaerobic digestion. In a sulfate-mediated BES, 75.0–83.2% of the total arsenic was immobilized in the sludge, significantly more compared to the anaerobic digestion (34.1–57.3%). Our results demonstrate that the combination of sulfate amendment and voltage application exerted a synergetic effect on enhancing HAPA degradation and sulfide-driven arsenic precipitation. This finding was further verified using real swine wastewater. A double-cell BES experiment indicated that As(V) and sulfate were transported from the anode to the cathode chamber and coprecipitated as crystalline alacranite in the cathode chamber. These findings suggest that the sulfate-mediated BES is a promising technique for enhanced arsenic decontamination of organoarsenic-bearing manure/wastewater.

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“…3) with 500 mM of arsenate. Adsorption of arsenate at high pH could be due to an increased negative charge on the cell surface which favored the electrochemical attraction and increased adsorption of the metal (Kang et al 2007). …”

Section: Resultsmentioning

confidence: 99%

Arsenate Resistant Penicillium coffeae: A Potential Fungus for Soil Bioremediation

Bhargavi

Janakiraman

2014

Bull Environ Contam Toxicol

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Bioremediation is an effective method for the treatment of major metal contaminated sites. Fungi were isolated from soil samples collected from different arsenate contaminated areas across India. An isolate, Penicillium coffeae, exhibited resistance to arsenate up to 500 mM. Results indicated that pretreatment of biomass with alkali (NaOH) enhanced the percentage of adsorption to 66.8 % as compared to that of live and untreated dead biomass whose adsorption was 22.9 % and 60.2 % respectively.

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Enhancement of As(V) adsorption onto activated sludge by methylation treatment

Cited by 8 publications

References 26 publications

Qualitative analysis of activated sludge using FT-IR technique

Qualitative analysis of activated sludge using FT-IR technique

Enhancing Roxarsone Degradation and In Situ Arsenic Immobilization Using a Sulfate-Mediated Bioelectrochemical System

Arsenate Resistant Penicillium coffeae: A Potential Fungus for Soil Bioremediation

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