Belén Herce-Sesa

Bio: Belén Herce-Sesa is an academic researcher from University of Cádiz. The author has contributed to research in topics: Extraction (chemistry) & Seawater. The author has an hindex of 8, co-authored 10 publications receiving 119 citations.

Advances in ionic liquids and deep eutectic solvents-based liquid phase microextraction of metals for sample preparation in Environmental Analytical Chemistry

Abstract: This work has been supported by Spanish Ministry of Economy and Competitiveness through the research project PGC2018- 101894-B-I00. BHS also thanks the Spanish Ministry of Education, Culture and Sports for the pre-doctoral grant FPU15/03924 and the University of Cadiz for the post-doctoral grant 2019-011/PU/ AY.PUENTE/CD.

The Design and Analysis of Experiments

Abstract: THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

Emerging Extraction Strategies in Analytical Chemistry.

Abstract: Extraction in the context of analytical chemistry (analytical-scale extraction) is defined as \"the transfer of target analyte from one phase to a different phase where further processing and analysis occurs\".1 The target analyte is thus isolated from the original sample, and transferred into an extract. In this way, the target analyte is separated from major sample matrix components. The sample is often a liquid, and the target analyte is extracted into (a) another liquid or (b) onto a solid. Extraction according to (a) and (b) are termed liquid-liquid extraction (LLE) and solid-phase extraction (SPE), respectively, and involve partition and mass transfer across liquid-liquid and liquid-solid boundaries. Partition is based on intermolecular forces involving hydrophobic, dispersion, dipole, hydrogen bond, and ionic interactions. The molecular interactions are highly influenced by the chemical properties of the extraction phase (extraction chemistry). In this review we discuss new extraction phases, which are currently investigated in the scientific literature. In addition, we discuss new technical formats (geometries) for extraction. Emerging extraction strategies as stated in the manuscript title, are thus defined as new extraction phases and new technical formats in this review.

A review of treatment technologies for the mitigation of the toxic environmental effects of acid mine drainage (AMD)

Abstract: Acid mine drainage (AMD) is a multi-factor pollution formed from complex chemical, physical, and biological interactions that takes place under ambient conditions in abandoned and active mines. Over the years, researchers have been investigating ways to mitigate its potential impact on the environment through various treatment technologies. The aim of this review was to critically analyze the broad spectrum of treatment methods that have been engaged in published literature on the remediation of AMDs. Adsorption treatment using zeolites, fly ash, biochar activated carbon, clay-based minerals and biomass-based adsorbents was discussed. Given an appropriate choice of adsorbent, ions in AMD can be reduced between 50% and 99%. Membrane separation processes like nanofiltration, reverse osmosis and hybrid systems were discovered to be more effective than adsorption and can effect over 90% rejection at optimized conditions. Biological processes showed a far wider range of performance amongst all treatment types due to the selectivity in performance of the different micro-organisms used although Advanced Oxidation Process (AOPs) have been shown to achieve>80% ions removal. In all biological processes studied ranging from wetlands to bioreactors, algal bioreactors seemed the most effective in this domain. Most of these treatment technologies are corrective while preventive techniques can be explored to prevent the production of AMD. Despite the positive outcomes of the different types of treatment, they have associated technical issues. It is recommended that more preventive techniques be explored to reduce the production of AMD. The review discussed how AMD treatment would affect environmental protection and water resource management. • Treatment technologies of acid mine drainage (AMD) were reviewed. • Given an appropriate choice of adsorbent, ions in AMD can be reduced between 50% and 99%. • Membrane processes are more effective than adsorption as they can effect over 90% rejection. • AOPs have been shown to achieve>80% ions removal. • Preventive measures for AMD formation are more advantageous than corrective technologies.