Browsing by Author "Douglas, Reward"

Now showing 1 - 4 of 4
  • Thumbnail Image
    ItemOpen Access
    Almost 25 years of chromatographic and spectroscopic analytical method development for petroleum hydrocarbons analysis in soil and sediment: State-of-the-art, progress and trends
    (Taylor & Francis, 2017-10-11) Douglas, Reward; Nawar, S.; Alamar, M. Carmen; Coulon, Frederic; Mouazen, Abdul M.
    This review provides a critical insight into the selection of chromatographic and spectroscopic techniques for semi-quantitative and quantitative detection of petroleum hydrocarbons in soil and sediment matrices. Advantages and limitations of both field screening and laboratory-based techniques are discussed and recent advances in chemometrics to extract maximum information from a sample by using the optimal pre-processing and data mining techniques are presented. An integrated analytical framework based on spectroscopic techniques integration and data fusion for the rapid measurement and detection of on-site petroleum hydrocarbons is proposed. Furthermore, factors influencing petroleum hydrocarbons analysis in contaminated samples are discussed and recommendations on how to reduce their influence provided.
  • Thumbnail Image
    ItemOpen Access
    The applicability of spectroscopy methods for estimating potentially toxic elements in soils: state-of-the art and future trends
    (Taylor and Francis, 2019-05-08) Nawar, S.; Cipullo, Sabrina; Douglas, Reward; Coulon, Frederic; Mouazen, A. M.
    Potentially toxic elements (PTEs) in soils pose severe threats to the environment and human health. It is therefore imperative to have access to simple, rapid, portable, and accurate methods for their detection in soils. In this regard, the review introduces recent progresses made in the development and applications of spectroscopic methods for in situ semi-quantitative and quantitative detection of PTEs in soil and critically compares them to standard analytical methods. The advantages and limitations of these methods are discussed together with recent advances in chemometrics and data mining techniques allowing to extract useful information based on spectral data. Furthermore, the factors influencing soil spectra and data analysis are discussed and recommendations on how to reduce or eliminate their influences are provided. Future research and development needs for spectroscopy techniques are emphasized, and an analytical framework based on technology integration and data fusion is proposed to improve the measurement accuracy of PTEs in soil.
  • No Thumbnail Available
    ItemOpen Access
    Evaluation of vis-NIR reflectance spectroscopy sensitivity to weathering for enhanced assessment of oil contaminated soils
    (Cranfield University, 2018-01-18 08:49) Coulon, Frederic; Douglas, Reward; del carmen Alamar Gavidia, Maria; Mouazen, Abdul; Nawar, Said
    Underpinning data on1. hydrocarbons data analysis by GCMS - quantification and 2. vis-NIR spectra analysis and chemometrics
  • No Thumbnail Available
    ItemOpen Access
    Rapid detection of alkanes and polycyclic aromatic hydrocarbons
    (Cranfield University, 2018-01-18T08:53:28Z) Coulon, Frederic; Mouazen, Abdul; Nawar, Said; del carmen Alamar Gavidia, Maria; Douglas, Reward
    Vis-NIR data spectra analysis and chemometric modelling