Noncovalently‐Bound Cyclodextrin Dimers and Related Compounds

Śliwa, Wanda; Girek, Tomasz

doi:10.1002/chin.200628252

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“…Based on these definitions, the rates and extents of 14 [59,60]. A HPCD initiated 'host-guest' complex [61] means that HPCD can readily form inclusion complex with naphthalene [62], enabling the extraction of the bioaccessible fraction of the contaminant in soil [21,22,25,29,37] irrespective of biochar concentration. This is because, HPCD can access the macroporous exterior cavity of biochar where majority of PAHs are often entrapped [46] and form complexes with the compounds of question for extraction.…”

Section: Mineralisation Of 14 C-naphthalene-associated Activity From mentioning

confidence: 99%

Impact of two contrasting biochars on the bioaccessibility of 14C-naphthalene in soil

Ogbonnaya

Thomas

Fasina

et al. 2016

Environmental Technology & Innovation

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This study investigated the impact of two different wood biochars (BioC1 and BioC2) on the extractability and biodegradation of 14 C-naphthalene in soil. Both biochars had contrasting properties due to difference in feedstocks and pyrolytic conditions (450-500 o C and 900-1000 o C, designated as BioC1 and BioC2, respectively). This study investigated effects of biochar on the relationship between 14 C-naphthalene mineralisation and calcium chloride (CaCl 2), hydroxypropyl-β-cyclodextrin (HPCD) or methanol extraction in soil amended with 0%, 0.1%, 0.5% and 1% BioC1 and BioC2 after 1, 18, 36 and 72 d contact times. Total extents of 14 C-naphthalene mineralisation and extraction were reduced with increasing concentrations of biochar; however, BioC2 showed greater sorptive capacity. Good linear correlation existed between total extents of 14 Cnaphthalene mineralisation and HPCD extractions in BioC1 (slope = 0.86, r 2 = 0.92) and BioC2 (slope = 0.86, r 2 = 0.94) amended soils. However CaCl 2 and methanol extractions underestimated and overestimated extents of mineralisation, respectively. These results indicate that biochar can reduce the bioaccessibility of PAHs and the corresponding risk of exposure to biota, whilst HPCD extraction estimated the bioaccessible fraction of PAHs in soil. Bioaccessibility assessment is vital in evaluation of biodegradation potential and suitability of bioremediation as a remediation option.

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Section: Mineralisation Of 14 C-naphthalene-associated Activity From mentioning

confidence: 99%

Impact of two contrasting biochars on the bioaccessibility of 14C-naphthalene in soil

Ogbonnaya

Thomas

Fasina

et al. 2016

Environmental Technology & Innovation

View full text Add to dashboard Cite

show abstract

Noncovalently‐Bound Cyclodextrin Dimers and Related Compounds

Abstract: ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Cited by 1 publication

References 1 publication

Impact of two contrasting biochars on the bioaccessibility of 14C-naphthalene in soil

Impact of two contrasting biochars on the bioaccessibility of 14C-naphthalene in soil

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