Marine microbial community response to inorganic and organic sediment amendments in laboratory mesocosms

Kan, Jinjun; Wang, Yanbing; Obraztsova, Anna; Rosen, Gunther; Leather, James; Scheckel, Kirk G.; Nealson, Kenneth H.; Arias-Thode, Y. Meriah

doi:10.1016/j.ecoenv.2011.06.011

Cited by 14 publications

(12 citation statements)

References 61 publications

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“…Different carbon sources, acetate, nitrate and sulfate, were used to modify the sulfate reducing community, and thus increase the sulfate-reducing activity. Acetate is commonly used as an organic amendment, and it provides an energy source for most microbes, including bacteria, archaea, and even eukaryotic microbes (Kan et al, 2011). Acetate serves as the best carbon source for indigenous bacteria in marine environments (Ingram-Smith et al, 2006).…”

Section: Microbial Community Analysis: Genus and Species Level Identimentioning

confidence: 99%

Optimization of biostimulant for bioremediation of contaminated coastal sediment by response surface methodology (RSM) and evaluation of microbial diversity by pyrosequencing

Subha

Song

Woo

2015

Marine Pollution Bulletin

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Section: Microbial Community Analysis: Genus and Species Level Identimentioning

confidence: 99%

Optimization of biostimulant for bioremediation of contaminated coastal sediment by response surface methodology (RSM) and evaluation of microbial diversity by pyrosequencing

Subha

Song

Woo

2015

Marine Pollution Bulletin

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“…Activated carbon, for example, has been shown to be useful for reducing bioavailability of polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) , while metal sequestration has been shown to be viable in freshwater and saltwater environments with other natural materials such as apatite (rock phosphate) Kan et al, 2011), which can irreversibly bind metals via the formation of insoluble metal phosphates (Fedoroff et al, 1999;Singh et al, 2001;Bailliez et al, 2004). Organoclays (e.g., bentonite) have been shown to remove both non-polar organic contaminants and metals from water (Alther, 2002;.…”

Section: Assessment Of the Biological Effects Associated With In Situmentioning

confidence: 99%

Processes, Assessment and Remediation of Contaminated Sediments

2014

SERDP/ESTCP Environmental Remediation Technology

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“…Mesocosm preparation and experimental setups followed previously described methods [30][31]. Briefly, for each treatment, 150 g of sediment was added to each of 5 replicate beakers.…”

Section: Amendment Experiments With Apatite and Chitinmentioning

confidence: 99%

“…All beakers were gently and continuously aerated. Based on the previous toxicological dose-response experiments and microbial response studies [30][31], apatite (5%) and chitin (0.5%) were selected as candidate amendment treatments. Concentrations of amendments and treatment setups are described in Table 1.…”

Section: Amendment Experiments With Apatite and Chitinmentioning

confidence: 99%

“…In addition to the effectiveness of bioremediation, one other critical perspective of inorganic or organic materials used as in situ amendment remediation alternatives, is to limit/avoid the impacts on living organisms. Therefore, during our primary study, we tested how the inorganic and organic amendments impacted microbial communities [30] and impacted the macro-invertebrate communities [31]. Dose-response experiments of candidate materials suggested that appropriate concentrations of apatite and chitin (5% and 0.5%, respectively) amendments had little or no negative impacts on water quality and ambient living organisms [31].…”

Section: Introductionmentioning

confidence: 99%

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Apatite and Chitin Amendments Promote Microbial Activity and Augment Metal Removal in Marine Sediments

Kan¹,

Obraztsova²,

Wang³

et al. 2013

OJMetal

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In situ amendments are a promising approach to enhance removal of metal contaminants from diverse environments including soil, groundwater and sediments. Apatite and chitin were selected and tested for copper, chromium, and zinc metal removal in marine sediment samples. Microbiological, molecular biological and chemical analyses were applied to investigate the role of these amendments in metal immobilization processes. Both apatite and chitin promoted microbial growth. These amendments induced corresponding bacterial groups including sulfide producers, iron reducers, and phosphate solubilizers; all that facilitated heavy metal immobilization and removal from marine sediments. Molecular biological approaches showed chitin greatly induced microbial population shifts in sediments and overlying water: chitin only, or chitin with apatite induced growth of bacterial groups such as Acidobacteria, Betaproteobacteria, Epsilonproteobacteria, Firmicutes, Planctomycetes, Rhodospirillaceae, Spirochaetes, and Verrucomicrobia; whereas these bacteria were not present in the control. Community structures were also altered under treatments with increase of relative abundance of Deltaproteobacteria and decrease of Actinobacteria, Alphaproteobacteria, and Nitrospirae. Many of these groups of bacteria have been shown to be involved in metal reduction and immobilization. Chemical analysis of pore and overlying water also demonstrated metal immobilization primarily under chitin treatments. X-Ray absorption spectroscopy (XAS) spectra showed more sorbed Zn occurred over time in both apatite and chitin treatments (from 9% - 27%). The amendments improved zinc immobilization in marine sediments that led to significant changes in the mineralogy: easily mobile Zn hydroxide phase was converted to an immobile Zn phosphate (hopeite). In-situ amendment of apatite and chitin offers a great bioremediation potential for marine sediments contaminated with heavy metals.

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Marine microbial community response to inorganic and organic sediment amendments in laboratory mesocosms

Cited by 14 publications

References 61 publications

Optimization of biostimulant for bioremediation of contaminated coastal sediment by response surface methodology (RSM) and evaluation of microbial diversity by pyrosequencing

Optimization of biostimulant for bioremediation of contaminated coastal sediment by response surface methodology (RSM) and evaluation of microbial diversity by pyrosequencing

Processes, Assessment and Remediation of Contaminated Sediments

Apatite and Chitin Amendments Promote Microbial Activity and Augment Metal Removal in Marine Sediments

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