Can adsorption isotherms predict sediment bioavailability?

Lawrence, Monique A.M.; Davies, Norman; Edwards, Paul A.; Taylor, Marina G.; Simkiss, K.

doi:10.1016/s0045-6535(99)00559-7

Cited by 40 publications

(29 citation statements)

References 18 publications

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“…This might explain the difficulties in fully extracting SMZ from the soil and especially manure, consistent with observations that sulfonamide sorption to pig slurry increased non-desorbable portions compared with soil [45,70]. These results are in contrast with high sulfonamide mobility and bioavailability in soil with no bioaccumulation [13,49]; this discrepancy can be due to different types of soils.…”

Section: Biodegradationsupporting

confidence: 81%

Soil Bacterial Consortia and Previous Exposure Enhance the Biodegradation of Sulfonamides from Pig Manure

et al. 2012

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Persistence or degradation of synthetic antibiotics in soil is crucial in assessing their environmental risks. Microbial catabolic activity in a sandy loamy soil with pig manure using 12C- and 14C-labelled sulfamethazine (SMZ) respirometry showed that SMZ was not readily degradable. But after 100 days, degradation in sulfadiazine-exposed manure was 9.2%, far greater than soil and organic manure (0.5% and 0.11%, respectively, p < 0.05). Abiotic degradation was not detected suggesting microbial catabolism as main degradation mechanism. Terminal restriction fragment length polymorphism showed biodiversity increases within 1 day of SMZ spiking and especially after 200 days, although some species plummeted. A clone library from the treatment with highest degradation showed that most bacteria belonged to α, β and γ classes of Proteobacteria, Firmicutes, Bacteroidetes and Acidobacteria. Proteobacteria (α, β and γ), Firmicutes and Bacteroidetes which were the most abundant classes on day 1 also decreased most following prolonged exposure. From the matrix showing the highest degradation rate, 17 SMZ-resistant isolates biodegraded low levels of 14C-labelled SMZ when each species was incubated separately (0.2-1.5%) but biodegradation was enhanced when the four isolates with the highest biodegradation were incubated in a consortium (Bacillus licheniformis, Pseudomonas putida, Alcaligenes sp. and Aquamicrobium defluvium as per 16S rRNA gene sequencing), removing up to 7.8% of SMZ after 20 days. One of these species (B. licheniformis) was a known livestock and occasional human pathogen. Despite an environmental role of these species in sulfonamide bioremediation, the possibility of horizontal transfer of pathogenicity and resistance genes should caution against an indiscriminate use of these species as sulfonamide degraders.

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Section: Biodegradationsupporting

confidence: 81%

Soil Bacterial Consortia and Previous Exposure Enhance the Biodegradation of Sulfonamides from Pig Manure

et al. 2012

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“…Differences in IR among studies may relate to factors such as temperature and sediment type (e.g., sediment particle size distribution and organic carbon content; Leppänen and Kukkonen, 1998a). The preferential feeding of L. variegatus on particles of <100 m (Lawrence et al, 2000) and the halt of feeding following fragmentation (Leppänen and Kukkonen, 1998b) did not influence our IR. Likewise, IR fluctuations were not related to changes in worm weight (Section 3.2).…”

Section: Dietborne Cu Biodynamics and Toxicitymentioning

confidence: 68%

Biodynamics of copper oxide nanoparticles and copper ions in an oligochaete – Part I: Relative importance of water and sediment as exposure routes

et al. 2015

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“…Using this classification, the experimental isotherms obtained in the present study were of type S. It should be noted that adsorption isotherms for PCP, TCP, and DCP on alumina-pillared montmorillonite and mesoporous alumina aluminum phosphates [31] and of PCP and DCP on sediments [34] all showed S-type characteristics. The initial part of the S curve indicates little interaction between PCP and the solid at low concentrations.…”

Section: Adsorption Isotherms Of Pcpmentioning

confidence: 57%