Application of PIX 112 to Arsenic Removal from Groundwater by Surface Coagulation in the Quartz Sand-Pyrolusite Filter Media

作者：Bray Rafal Tytus^*; Fitobor Karolina

来源：Ochrona Srodowiska, 2016, 38(2): 45-48.

• Water treatment
• groundwater
• arsenic
• coagulation
• filtration

Results of technological studies on arsenic removal from natural groundwater using iron co-precipitation in a rapid filtration system were presented. The groundwater used in the research contained approximately 40 mgAs/m(3), 0.3 gFe/m(3) and 0.09 gMn/m(3). Purification system relied on the iron coagulant dosing, water aeration/mixing and filtration through the quartz sand and pyrolusite bed. Solution of iron(III) sulfate, i.e. PIX 112 was applied as a coagulation agent. Pilot scale research demonstrated that surface coagulation with iron(III) ions enabled effective arsenic removal to the level complying with the quality standards for water intended for human consumption (<10 mgAs/m(3)) even with relatively small coagulant doses of approximately 2.0 gFe/m(3). Alongside arsenic, iron compounds were removed, both those naturally occurring in the treated water and those dosed as a coagulant. Moreover, the pyrolusite layer in the filter bed enabled effective manganese removal from water. Full technical scale experiments clearly confirmed the results obtained during the pilot phase. In particular, even higher effectiveness of arsenic removal of up to less than 6.0 mgAs/m(3) was obtained with lower coagulant doses than those applied in the pilot studies.

• 出版日期2016