Lake responses following lanthanum-modified bentonite clay (Phoslock) application: an analysis of water column lanthanum data from 16 case study lakes

B.M. Spears, M.F.L.L.W. Lürling, S. Yasseri, A.T. Castro-Castellon, M. Gibbs, S. Meis, C. McDonald, J. McIntosh, D. Sleep, F. van Oosterhout

Research output: Contribution to journalArticleAcademicpeer-review

94 Citations (Scopus)

Abstract

Phoslock is a lanthanum (La) modified bentonite clay that is being increasingly used as a geo-engineering tool for the control of legacy phosphorus (P) release from lake bed sediments to overlying waters. This study investigates the potential for negative ecological impacts from elevated La concentrations associated with the use of Phoslock across 16 case study lakes. Impact-recovery trajectories associated with total lanthanum (TLa) and filterable La (FLa) concentrations in surface and bottom waters were quantified over a period of up to 60 months following Phoslock application. Both surface and bottom water TLa and FLa concentrations were
Original languageEnglish
Pages (from-to)5930-5942
JournalWater Research
Volume47
Issue number15
DOIs
Publication statusPublished - 2013

Keywords

  • surface water quality
  • groundwater quality
  • eutrophication
  • lakes
  • ecological restoration
  • recovery
  • remediation
  • control methods
  • lanthanum
  • bentonite
  • phosphorus
  • sediment
  • ecological risk assessment
  • aquatic ecology
  • phosphorus-binding clay
  • shallow lakes
  • unintended consequences
  • loch leven
  • restoration
  • removal
  • daphnia
  • quality
  • netherlands

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