Heavy metal pollution exerts reduction/adaptation in the diversity and enzyme expression profile of heterotrophic bacteria in Cochin estuary, India

Heavy Metals Pollution Influence the Community Structure of Cyanobacteria in Nutrient Rich Tropical Estuary

“…However, the influence of heavy metal pollution on diversity of photosynthetic microorganisms are not studied till date. In a previous study we reported the influence of heavy metal pollution on the diversity and enzyme expression profile of heterotrophic bacteria in CE [9]. In the present study, we report the influence of dissolved heavy metals on the community structure of cyanobacteria in CE.…”

“…CE also receives high concentrations of industrial effluents (104 × 10 3 m 3 per day) and untreated domestic waste (260 m 3 ). Like most estuaries, the anthropogenic contribution of heavy metals has increased significantly in CE over the past three decades [9]. However, the influence of heavy metal pollution on diversity of photosynthetic microorganisms are not studied till date.…”

“…Estuaries, being the transition zone between fresh-and marine-water systems, function as receiving points of heavy metals and other pollutants of anthropogenic origin and regulate their supply to the coastal environment. Heavy metal pollution in estuaries has increased significantly in the recent past through enhanced discharge of industrial and domestic wastes [6][7][8][9]. Previous studies showed that heavy metal pollution causes unintended alterations in the functioning of estuarine ecosystems [10][11][12][13].…”

The influence of single and combined effects of Zn, Cu and temperature on microbial growth

“…GS19h strain (Chakravarty et al, 2007), for Acidiphilium symbioticum H8 (Chakravarty and Banerjee, 2008) and for Pseudomonas aeruginosa strain 4EA (Naik and Dubey, 2011), due to exposure to heavy metals. Besides morphological changes, reduction/adaptation of bacterial distribution, diversity and reduction enzyme expression profiles of various bacterial isolates due to the effect of heavy metals have recently been investigated (Jose et al, 2011).…”

Preparation of Diamine-modified Ordered Mesoporous SBA-15 and Its Adsorption Property to Pb2+

“…Heavymetalpollutionisenvironmentpollutioncausedbymetalorotherchemicalcompound thedensityofwhichhigherthan5 [1] .Thepollutionmanlycausedbydevelopmentofmine,releaseof waste,ortheuseofheavymetal,withthepropertyofenrichmentandhardtodegrade [2] .Amongthe heavymetal,Pb,Hg,As,Cd,havethemosttoxiceffectonhuman'sbody.Thesemetalcan'tresolve inwater,becomemoretoxicafterbeingdrinkin,combinewithotherpoisoninwaterformorganics withstrongertoxicity [3,4] .Nowthere'reVarietyofmethodstoreducetheheavymetalpollutionin water,themostcommonisadsorptionmethod [5,6] ,it'sawaytousemesoporousabsorptingand separateharmfulsubstanceinwater [7] .There'sbeenaboomingofmesoporousmaterialsinrecent decadesespeciallyMesoporoussilicamaterials,hasbecameahitresearchareasinceit'seasyto prepareandhavelargerspecificsurfaceareaandmesoporevolume [8][9][10][11] .MesoporousSBA-15has highlyorderedTwo-dimensionalsixsquarechannel [12] ,poresizecanrangefrom5nmto30nm [13] . However,puresiliconmesoporousSBA-15'sstructureonlyconsistsofsiliconandoxygen,thelack ofactivecentercauseapoorion-exchangecapacity.Sothemainideaofthispaperusephotosynthesis adddifferentamountsofDiaminetopuresiliconSBA-15toincreasethematerial'sabsorbabilityto Pb 2+ inwater.…”