Heavy metals and soil microbes

Giller, Ken E.; Witter, Ernst; McGrath, Steve P.

doi:10.1016/j.soilbio.2009.04.026

Cited by 400 publications

(212 citation statements)

References 53 publications

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“…The water-soluble metal represented the most free and bioavailable relevant metal fraction (Giller et al 2009;Peijnenburg and Jager 2003;Worms et al 2006). However, direct contact assay of biosensor with soil particles could reflect a distinctly higher level of bioavailable Cd (20-or 115-fold), Hg (30-fold), and Pb (40-fold) than soil-water extract assay (Ivask et al 2002(Ivask et al , 2004.…”

Section: Application Of Biosensor To Assess the Bioavailable As In DImentioning

confidence: 99%

“…There are different definitions of metal fraction based on different extraction methods, for example, according to a proposal of the European Community Bureau of Reference (BCR), the -acid extractable, -reducible, andoxidizable metal was defined as the SEPs fraction (Rauret et al 1999). Recently, BCR-SEPs were widely used to analyze different metal fractions which could reflect the release of metal from solid-phase soil and metal mobility in soil (Degryse et al 2009;Giller et al 2009;Peijnenburg et al 2007). Although sequential extraction procedures have been popularized in the analysis of metal fractions, it was still criticized because of its low repeatability and representativeness due to the use of different reagents and procedures (Filgueiras et al 2002;Nolan et al 2003;Toevs et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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The impacts of different long-term fertilization regimes on the bioavailability of arsenic in soil: integrating chemical approach with Escherichia coli arsRp::luc-based biosensor

Hou

et al. 2014

Appl Microbiol Biotechnol

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An Escherichia coli arsRp::luc-based biosensor was constructed to measure the bioavailability of arsenic (As) in soil. In previous induction experiments, it produced a linear response (R 2 =0.96, P<0.01) to As from 0.05 to 5 μmol/L after a 2-h incubation. Then, both chemical sequential extraction, Community Bureau of Reference recommended sequential extraction procedures (BCR-SEPs) and E. coli biosensor, were employed to assess the impact of different long-term fertilization regimes containing N, NP, NPK, M (manure), and NPK+ M treatments on the bioavailability of arsenic (As) in soil. Per the BCR-SEPs analysis, the application of M and M+NPK led to a significant (P<0.01) increase of exchangeable As (2-7 times and 2-5 times, respectively) and reducible As (1.5-2.5 times and 1.5-2.3 times, respectively) compared with the no fertilization treated soil (CK). In addition, direct contact assay of E. coli biosensor with soil particles also supported that bioavailable As in manure-fertilized (M and M+NPK) soil was significantly higher (P<0.01) than that in CK soil (7 and 9 times, respectively). Organic carbon may be the major factor governing the increase of bioavailable As. More significantly, E. coli biosensor-determined As was only 18.46-85.17 % of exchangeable As and 20.68-90.1 % of reducible As based on BCR-SEPs. In conclusion, NKP fertilization was recommended as a more suitable regime in As-polluted soil especially with high As concentration, and this E. coli arsRp::luc-based biosensor was a more realistic approach in assessing the bioavailability of As in soil since it would not overrate the risk of As to the environment.

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Section: Application Of Biosensor To Assess the Bioavailable As In DImentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The impacts of different long-term fertilization regimes on the bioavailability of arsenic in soil: integrating chemical approach with Escherichia coli arsRp::luc-based biosensor

Hou

et al. 2014

Appl Microbiol Biotechnol

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“…Heavy metals, such as cadmium, chromium, lead and mercury, are highly toxic pollutants of increasing concern in developed countries for their significant impact on the environment and human health (Coen et al, 2001;Arowolo, 2004;Giller et al, 2009). Lead (Pb), in particular, is one of the most common environmental contaminants due to its wide use in petroleum, mining, paint and pigments, ceramics and weapons industries.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Pb(II) on Spent Leaves of Green and Black Tea

Zuorro¹,

Lavecchia

2010

American Journal of Applied Sciences

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Problem statement:In recent years much attention has been focused on the use of biomass residues as low-cost adsorbents for the removal of heavy metal ions from contaminated waters. Spent tea leaves, an abundantly available material that is currently disposed of as a solid waste, are potentially suitable for such applications. Approach: To provide some information on the adsorption properties of tea waste, we evaluated the removal efficiency of lead ions by spent leaves of green and black tea. Batch adsorption experiments were made at 25 and 40°C at initial lead-ion concentrations between 0.01 and 2 g L −1 . Equilibrium data were analyzed by the Langmuir equation to evaluate the maximum adsorption capacity and the equilibrium constant. The adsorption characteristics of the two materials were also compared with those of coffee grounds, activated carbon and Fuller's earth. Results: Experimental data showed that removal efficiencies up to 98-99% can be achieved when using spent tea leaves as lead adsorbent. The results were only marginally affected by the type of tea waste. At low lead loading, the adsorption equilibrium was well described by the Langmuir equation, with a maximum adsorption capacity of 83-130 mg g −1 and an equilibrium constant ranging from 0.112-0.245 L mg −1 . A comparison with other adsorbents provided the following order for lead removal efficiency: Black tea, coffee grounds > green tea > Fuller's earth > activated carbon. Conclusion:The results from this study indicate that using spent tea leaves as an adsorbent may be an efficient and economical means for removing lead and, presumably, other heavy metal ions from aqueous solutions.

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“…However, HM pollution may affect microorganism communities, generating changes in their structure and biodiversity, which in turn, has consequences on the soil processes in which they participate [60,61]. For example, development alterations and in biochemical processes of microorganism have been reported [61][62][63].…”

Section: Heavy Metal Incorporation Into the Ecosystemsmentioning

confidence: 99%

Heavy Metal Pollution as a Biodiversity Threat

Tovar-Sánchez¹,

Hernández-Plata²,

Santoyo-Martínez³

et al. 2018

Heavy Metals

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Heavy metals exert their toxic effects through different mechanisms. Lately, increasing attention has been focused on understanding the long-term ecological effects of chronically exposed populations and communities and their consequences to the ecosystem. The long-term exposure to heavy metals in the environment represents a threat to wild populations, affecting communities and putting ecosystem integrity at risk. Therefore, this type of exposure represents a threat to biodiversity. In the field, metal exposure is generally characterized by low doses and chronic exposures. This type of exposure exerts alterations across levels of biological organization. Distribution and abundance of populations, the community structure and the ecosystem dynamics may be altered. This chapter will focus on how chronically metal exposures in the field affect negatively populations and communities becoming a threat to biodiversity. Also, attention is put on the tools that enable to characterize and analyze the detrimental effects of heavy metal exposure on wild populations. Hence, the use and development of biomarkers in ecotoxicology will be discussed.

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Heavy metals and soil microbes

Cited by 400 publications

References 53 publications

The impacts of different long-term fertilization regimes on the bioavailability of arsenic in soil: integrating chemical approach with Escherichia coli arsRp::luc-based biosensor

The impacts of different long-term fertilization regimes on the bioavailability of arsenic in soil: integrating chemical approach with Escherichia coli arsRp::luc-based biosensor

Adsorption of Pb(II) on Spent Leaves of Green and Black Tea

Heavy Metal Pollution as a Biodiversity Threat

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