The effect of a phosphonate-based antiscalant on the morphology and precipitation kinetics of gypsum: The Red Sea - Dead Sea project

Amit G. Reiss, Jiwchar Ganor, Ittai Gavrieli

Research output: Contribution to journalConference article

Abstract

The proposed plan for the 'Red Sea - Dead Sea project' has raised concerns that the surface water of the Dead Sea would turn white due to gypsum precipitation. The occurrence of such an event would depend on the precipitation kinetics and the morphology of the precipitating crystals. Batch experiments were conducted to study the effect of a phosphonate-based antiscalant on the precipitation kinetics and morphology of gypsum under the conditions of this project. Addition of the antiscalant was found to increase the induction time by a factor of 1.2-5 over the entire range of Dead Sea - Seawater mixtures investigated, depending on brine composition. Once nucleation occurred, the antiscalant also slowed the crystal growth by a factor of 1.2-3. However, when the solutions were seeded with gypsum, the rate of crystal growth with and without antiscalant were similar, within uncertainty. More crystals precipitated from unseeded solutions with no antiscalant and the crystals were smaller and less tabular than those precipitated from unseeded solutions with antiscalant.

Original languageEnglish
Article number04011
JournalE3S Web of Conferences
Volume98
DOIs
StatePublished - 7 Jun 2019
Event16th International Symposium on Water-Rock Interaction, WRI 2019 and 13th International Symposium on Applied Isotope Geochemistry, 1st IAGC International Conference - Tomsk, Russian Federation
Duration: 21 Jul 201926 Jul 2019

ASJC Scopus subject areas

  • Environmental Science (all)
  • Energy (all)
  • Earth and Planetary Sciences (all)

Fingerprint

Dive into the research topics of 'The effect of a phosphonate-based antiscalant on the morphology and precipitation kinetics of gypsum: The Red Sea - Dead Sea project'. Together they form a unique fingerprint.

Cite this