title: Organic matter from benthic foraminifera(Ammonia beccarii)shells by FT-IR spectroscopy: A study on Tupilipalem, South east coast of India.
abstract: Fourier Transform Infrared Spectroscopy (FTIR) was used to study the variations in organic matters of benthic foraminifera(Ammonia beccarii)from four samples collected from beach environments from brackish environments along Tupilipalem coast (South east coast of India). Common absorption bands were observed as peaks in the range of 3600-3400 cm-1, 3000-2850 cm-1, 1750-1740 cm-1, 1640-1600 cm-1, 1450-1350 cm-1, 885-870 cm-1and 725-675 cm-1in all the shells ofAmmonia beccarii. The FTIR spectrum of station-1 represents the presence of alkanes (CH3) and alkyl halide (C-F stretching) with absorptions at the range 1385-1255 and 1350-1150 cm-1were observed and ether (C-O stretching) absorption band was observed at stations 1 and 3 with wavenumber of 1115 cm-1and 1117 cm-1respectively. Alkynes C-H bend was observed at station-1 with the wavenumber of 667.43 cm-1. The shifting of peak positions in all the samples is could be due to presence of organic matter in the samples. Satellite remote sensing and field observation data revealed that the river mouth at Tupilipalem coast was closed by a sand bar. Consequentially, this waterbody may affect the species diversity. •Positions of the sampling locations were identified using a hand-held Garmin Global Positioning System (GPS).•Foraminifera from the sediment were obtained using a mixture of Bromoform and Acetone.•The functional groups present in the benthic foraminifera shells were recorded in the spectral range of 4000-400 cm-1using an FT-IR Spectrophotometer.
authors.affiliation: Department of Geology, Yogi Vemana University, Kadapa, Andhra Pradesh, India.
authors.forename: G
authors.initials: G
authors.lastname: Sreenivasulu
authors.affiliation: Department of Geology, Yogi Vemana University, Kadapa, Andhra Pradesh, India.
authors.forename: N
authors.initials: N
authors.lastname: Jayaraju
authors.affiliation: Department of Geology, Sri Venkateswara University, Tirupati, Andhra Pradesh, India.
authors.forename: B C
authors.initials: BC
authors.lastname: Sundara Raja Reddy
authors.affiliation: Department of Earth Sciences, Yogi Vemana University, Andhra Pradesh, India.
authors.forename: T
authors.initials: T
authors.lastname: Lakshmi Prasad
authors.affiliation: Department of Earth Sciences, Yogi Vemana University, Andhra Pradesh, India.
authors.forename: K
authors.initials: K
authors.lastname: Nagalakshmi
authors.affiliation: Department of Geology, Yogi Vemana University, Kadapa, Andhra Pradesh, India.
authors.forename: B
authors.initials: B
authors.lastname: Lakshmanna
keywords: Benthic foraminifera; Biodegradation; FT-IR Spectroscopy procedure was used as mentioned by Ref # 15; FTIR spectrophotometer; Organic matter