J.P. Bolivar

Prof. Dr. J.P. Bolivar

Department of Integrated Sciences, Center for Natural Resources, Health and Environment (RENSMA), University of Huelva, 21007 Huelva, Spain
orcid

Research Focus & Metrics

Academic Career Length

32Years (1995-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 May 2010 in Applied Geochemistry
Verified
Journal Article
Closed access
RPRafael Pérez-López
Rafael Pérez-López
Jose Miguel NietoJose Miguel Nieto
Jose Miguel Nieto
ILIsrael López-Coto
Israel López-Coto
JAJuan Luis Aguado
Juan Luis Aguado
JBJ.P. Bolivar
J.P. Bolivar
MSMaría santisteban
María santisteban

1 August 2014 in Journal of Hazardous Materials
Verified
Journal Article
Open access
ACAntonio Cuadri
Antonio Cuadri
FNFrancisco Javier Navarro
Francisco Javier Navarro
Moises Garcia-MoralesMoises Garcia-Morales
Moises Garcia-Morales
JBJ.P. Bolivar
J.P. Bolivar
The accumulation of phosphogypsum waste from the fertilizer industries, which remain in regulated stacks occupying considerable land resources, is causing significant environment problems worldwide. In that sense, the scientific community is being pressured to find alternative ways for their disposal. In this research, we propose a novel application for phosphogypsum waste, as a modifier of bitumen for flexible road pavements. Viscous flow tests carried out on bitumen modified with a phosphogypsum waste and doped with sulfuric acid demonstrated an extraordinary increase in viscosity, at 60°C, when compared to a counterpart sample which had been modified with gypsum, the main component of phosphogypsum. Similarly, a significant improvement in the viscoelastic response of the resulting material at high temperatures was also found. FTIR (Fourier transform infrared spectroscopy) scans provided evidences of the existence of chemical reactions involving phosphorus, as revealed by a new absorption band from 1060 to 1180cm(-1), related to COP vibrations. This result points at phosphorus contained in the phosphogypsum impurities to be the actual "modifying" substance. Furthermore, no COP band was observed in the absence of sulfuric acid, which seems to be the "promoting" agent of this type of bond.

1 January 2020 in Journal of Cleaner Production
Verified
Journal Article
Closed access
JRJ. Rosales
J. Rosales
SPS.M. Pérez
S.M. Pérez
Manuel CabreraManuel Cabrera
Manuel Cabrera
MGManuel Jesus Gazquez Gonzalez
Manuel Jesus Gazquez Gonzalez
JBJ.P. Bolivar
J.P. Bolivar
FAF. Agrela
F. Agrela

1 November 2015 in Waste Management
Verified
Journal Article
Open access
Manuel Contreras LlanesManuel Contreras Llanes
Manuel Contreras Llanes
RPR. Pérez-López
R. Pérez-López
MGManuel Jesus Gazquez Gonzalez
Manuel Jesus Gazquez Gonzalez
MVMorales-Flórez Víctor
Morales-Flórez Víctor
ASALBERTO SANTOS
ALBERTO SANTOS
JBJ.P. Bolivar
J.P. Bolivar
The industry of phosphoric acid produces a calcium-rich by-product known as phosphogypsum, which is usually stored in large stacks of millions of tons. Up to now, no commercial application has been widely implemented for its reuse because of the significant presence of potentially toxic contaminants. This work confirmed that up to 96% of the calcium of phosphogypsum could be recycled for CO2 mineral sequestration by a simple two-step process: alkaline dissolution and aqueous carbonation, under ambient pressure and temperature. This CO2 sequestration process based on recycling phosphogypsum wastes would help to mitigate greenhouse gasses emissions. Yet this work goes beyond the validation of the sequestration procedure; it tracks the contaminants, such as trace metals or radionuclides, during the recycling process in the phosphogypsum. Thus, most of the contaminants were transferred from raw phosphogypsum to portlandite, obtained by dissolution of the phosphogypsum in soda, and from portlandite to calcite during aqueous carbonation. These findings provide valuable information for managing phosphogypsum wastes and designing potential technological applications of the by-products of this environmentally-friendly proposal.

30 July 2009 in Journal of Hazardous Materials
Verified
Journal Article
Closed access
MGManuel Jesus Gazquez Gonzalez
Manuel Jesus Gazquez Gonzalez
JBJ.P. Bolivar
J.P. Bolivar
RGR. García-Tenorio
R. García-Tenorio
FVF. Vaca
F. Vaca

1 February 2009 in Applied Radiation and Isotopes
Verified
Journal Article
Closed access
JBJ.P. Bolivar
J.P. Bolivar
Julia MartinJulia Martin
Julia Martin
RGR. García-Tenorio
R. García-Tenorio
JPJ.P. Pérez-Moreno
J.P. Pérez-Moreno
JMJ.L. Mas
J.L. Mas