Sustainable Removal of Iron Clogging in Boreholes

Presented on Tuesday, December 3, 2019

Iron (lll) clogging has been removed with various acids and combinations for centuries. pH-neutral reducers; however, exceed 50 times the dissolving capacity of hydrochloric acid at pH1 in an identical molar concentration. Removal of this iron by acids requires pH-values of <1 before significant amounts are dissolved. By reacting first with other minerals surrounding the boreholes, they cause cavities and irreversible damage. You will learn about a low pressure injection technique that has proven efficiency for decades. The dissolution process is controlled by continuous measurements of conductivity and reaction products. A presented case study will document a sustainable rehabilitation of 37 wells supplying an industrial plan in Germany. Results of previous rehabilitations were more than doubled; saving >70% of the budget.

Päivi Puronpää-Schäfer
Cleanwells, 78628 Rottweil, Germany
Päivi Puronpää-Schäfer, M.A., completed her studies at universities in Finland, France and Germany, is the managing director of cleanwells ®, a company licensed in Germany, Russia, and the United Kingdom which specializes in pH-neutral rehabilitation agents, in particular to remove iron(III) and manganese(IV), to remedy the hazardous acidization of water wells and to optimize the technical equipment. Experienced in hydro-chemical well rehabilitation in South America, Europe, the Middle East and Asia, she masters nine languages.
NGWA may only post those brown bag sessions, Webinars, event sessions, and like for which we have obtained copyright permission from the presenter. Furthermore, by accessing or downloading any of these items, you agree they are for your own personal use and may not be disseminated by any means to others via any medium. Click here to read NGWA's proprietary legend and disclaimers before proceeding.