Effect of Various Environmental Parameters on Biosorptive Removal of Atrazine from WaterEnvironment

Pathak, Raj Kumar; Dikshit, Anil Kumar

doi:10.7763/ijesd.2012.v3.233

Cited by 8 publications

(3 citation statements)

References 27 publications

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“…R. arrhizus türü 480 dakika sonunda pH 6'da en iyi Atrazin giderimini gerçeklefltirmifltir (fiekil 3). Pathak ve Dikshit (2012) mantar kolonilerini kurutarak elde ettikleri biyosorbentleri kullanm›fl ve en iyi Atrazin gideriminin pH 6'da gerçekleflti¤ini göstermifltir (17). Yaplan baflka bir çal›flmada ise Amberlisit kullan›larak Atrazin adsorpsiyonu incelenmifl ve en iyi pH 6.5 bulunmufltur (18).…”

Section: Ph'ın Biyosorpsiyona Etkisiunclassified

Tarimda Kullanilan Atrazi̇ni̇n Gi̇deri̇mi̇nde Rhizopus

Gül¹,

Silah²

2017

GIDA

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ÖzTar›msal üretiminde kullan›lan Atrazinin toprakta oluflan kal›nt›lar› daha sonra yeralt› ve yerüstü sular›na tafl›nmaktad›r. Yüksek miktarlarda biriken Atrazin canl› organizmalar için toksik etki oluflturmaktad›r. Atrazinle kirlenmifl sulu çevrelerin ar›t›m› önemli bir konu olmaktad›r. Biyobirikim ve biyosorpsiyon bu tür kirleticilerin çevreden gideriminde çevre dostu bir yöntem olarak önerilmektedir. Bu çal›flman›n amac› hem besiyerinde geliflmekte olan hem de kurutulmufl fungal biyokütlenin Atrazin giderim kapasitesini belirlemektir. Çal›flmada Rhizopus arrhizus kültürünün biyobirikim ve biyosorpsiyonla Atrazin giderimine pH de¤erlerinin etkisi belirlenmifltir. Atrazin analizinde elektrokimyasal yöntem kullan›lm›flt›r. Biyobirikim ve biyosorpsiyon sonunda en iyi Atrazin giderimi s›ras›yla pH 4 ve pH 6'da gerçekleflmifltir. Geliflmekte olan R. arrhizus kültürü ve kurutulmufl fungal biyokütle s›ras›yla %57.45 ve %63.16 Atrazin giderimi gerçeklefltirmifltir. Bu çal›flma sonuçlar›na göre fungal biyokütle pestisitle kirlenmifl s›v› ortamlardan Atrazin giderimini k›sa bir zaman aral›¤›nda gerçeklefltirebilmifltir. Denemeler tar›msal üretiminde yayg›n olarak kullan›lan Atrazinin çevreye olumsuz etkilerini azaltmak için alternatif olarak fungal biyokütlenin kullan›labilece¤ini göstermifltir. AbstractAtrazine is commonly used in agricultural activities. Atrazine residues occur in soil and then move to underground and surface waters. The higher amount of Atrazine is toxic for living organisms. The treatment of Atrazine contaminated aquoeous environment is an important issue. Bioaccumulation and biosorption is suggested as an eco-friendly way to remove this kind of pollutans in the environment. The aim of this study is to determine the Atrazine removal capacity of both growing Rhizopus arrhizus culture and dried fungal biomass. The effect of different pH values on Atrazine bioaccumulation and biosorption by R. arrhizus culture was determined in this study. Electrochemical methods were used for Atrazine analyse. The optimal pH for Atrazine removal was determined as 4 and 6 for bioaccumulation and biosorption, respectively. The growing R. arrhizus culture and dried R. arrhizus biomass removed 57.45% and 63.16% of Atrazine, respectively. According to the results of this study the fungal strain was effectively removed Atrazine from pesticide contaminated aquoeous solutions in a short time period. This study showed that the fungal systems can be used as alternative ways to reduce negative environmental impact of Atrazine.

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Section: Ph'ın Biyosorpsiyona Etkisiunclassified

Tarimda Kullanilan Atrazi̇ni̇n Gi̇deri̇mi̇nde Rhizopus

Gül¹,

Silah²

2017

GIDA

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“…Greater than 46 nM (10 µg L -1 , 10 ppb) of ATR has regularly been detected in rivers, groundwater, and drinking water in the U.S. (18), whereas the United States Environmental Protection Agency has set the maximum contaminant level (MCL) at 13.8 nM (3 µg L -1 , 3 ppb) in drinking water (10,19). Bioremediation, the use of microorganisms or microbial processes to degrade environmental contaminants, has been recognized as one of the most cost-effective cleanup strategies to remove ATR regarding its efficiency and eco-friendliness (20)(21)(22)(23)(24)(25)(26)(27).…”

Section: Introductionmentioning

confidence: 99%

Bioremediation of Atrazine and its Metabolite Using Multiple Enzymes Delivered by aBacillus thuringiensisSpore Display System

Hsu,

Hsieh,

Stewart

et al. 2023

Preprint

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Atrazine (ATR), a widely used herbicide in the United States, has contaminated ground and surface water. The persistence in the environment, the carcinogenic characteristic, and the endocrine disruption activity of ATR raises public health concerns. To provide a clean source of drinking water, it is imperative to remediate ATR and its metabolites without toxic by-products. A green technology,Bacillus thuringiensisspore-based display system, has been developed to express a high density of enzymes on the spore surface. TheB. thuringiensisspore can serve as a bioparticle to deliver enzymes to different environments and enhance the stability and shelf-life of enzymes expressed on their surface. A cluster of enzymes, AtzA, AtzB, AtzC, AtzD, AtzE, and AtzF, found inPseudomonas sp.strain ADP, remediates ATR to CO2and NH3in the degradation pathway. AtzA-bearing spores were generated, and they successfully demonstrated the capability of converting ATR to its metabolite, hydroxyatrazine (HA) [Hsiehet al.2020]. In this study, AtzB, a hydroxyatrazineN-ethylaminohydrolase that hydrolyzes HA toN-isopropylammelide (NiPA), was expressed on theBacillusspores by fusingatzBto the gene encoding the attachment domain of the BclA spore surface nap layer protein. The results showed that 1 mg AtzB-bearing spores degraded 50% of HA to NiPA in water within 12 hours. The Kmand Vmaxof AtzB-bearing spores with HA as a substrate were 25.28 µM and 1.26 nmole NiPA h-1mg-1spores, respectively. The optimal ratio of 1:2 for AtzA-bearing to AtzB-bearing spores was applied and successfully converted 90% ATR to NiPA in the water after 96 hours of incubation. The surface water with the addition of 34.5 nM (7.5 µg L-1) of ATR was treated with a combination of AtzA-bearing and AtzB-bearing spores in a 96-hour time course study. Over 80% of applied ATR in surface water was degraded and ATR concentration was below the United States Environmental Protection Agency maximum contaminant level, 13.8 nM (3 µg L-1) within 24 hours. At the end of 96 hours. ATR in surface water was completely converted to NiPA. We have successfully demonstrated the application of multienzyme bioremediation of ATR using theBacillusspore-based display system in the surface water in the laboratory.

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“…adsorption [54][55][56], phytoremediation [57], and biodegradation [58]. Photolysis, hydrolysis, dehalogenation, and oxygenation are chemical methods applied to atrazine contaminated environments [59]. The incineration method can destroy over 99.9% of organic pesticides and forms toxic and corrosive gases [53].…”

Section: Current Treatment Technologies For Agricultural Contaminantsmentioning

confidence: 99%

Surface activation of rice husk-derived hydrochar as an adsorbent for atrazine and ammonium

Phan

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Due to the agricultural intensity, studies of sustainable solutions for atrazine and nitrogen contamination have attracted more attention. This study is aimed to develop rice husk hydrochar as an adsorbent for atrazine and ammonium adsorption. Effects of microwave-assisted hydrothermal carbonization (MHTC) conditions including temperature (150 200?C), residence time (20 60 min), and liquid to solid ratio (5:1 15:1 mL/g) on the atrazine and ammonium adsorption capacity were investigated. Surface activation of rice husk hydrochar samples was synthesized using potassium hydroxide (KOH) and hydrogen peroxide (H2O2) with various concentrations. The results showed that higher MHTC temperature with higher residence time and lower liquid to solid ratio significantly increased the adsorption capacity of these contaminants on rice husk hydrochar. The characterization of pristine and activated hydrochars using BET, FT-IR, and XPS revealed that rice husk hydrochar contained abundant oxygen-containing functional groups, which increased even more after KOH treatment. The results of kinetic and isotherm studies suggested that atrazine adsorption was best fitted with pseudo-second-order and Freundlich models (R2 > 0.99), with the maximum adsorption capacity of 4.06 mg/g for KOH-activated hydrochar. Hydrogen-bonding and ?-? electron donor-acceptor interactions played dominant roles for atrazine adsorption of KOH-activated hydrochar and H2O2-activated hydrochar, respectively. Compared to atrazine, the ammonium adsorption onto rice husk hydrochar was very low even though the KOH treatment enhanced its CEC values. Therefore, rice husk hydrochar can be considered a promising candidate for atrazine adsorption in the environment, and future studies are recommended to apply this material as a nitrogen slow-release fertilizer.

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Effect of Various Environmental Parameters on Biosorptive Removal of Atrazine from WaterEnvironment

Cited by 8 publications

References 27 publications

Tarimda Kullanilan Atrazi̇ni̇n Gi̇deri̇mi̇nde Rhizopus

Tarimda Kullanilan Atrazi̇ni̇n Gi̇deri̇mi̇nde Rhizopus

Bioremediation of Atrazine and its Metabolite Using Multiple Enzymes Delivered by aBacillus thuringiensisSpore Display System

Surface activation of rice husk-derived hydrochar as an adsorbent for atrazine and ammonium

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