Point-of-use removal of lead and copper in drinking water using

Details Point-of-use removal of lead and copper in drinking water using Point-of-use removal of lead and copper in drinking water using

1996-10-10

2000-08-22

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210679, 210688, 210912, C02F 152

Patent

active

061067253

ABSTRACT:
A process for removing lead and copper from drinking water discharged from a drinking water outlet while suppressing the concentration of phosphate ions comprising directing the water through a matrix comprising phosphate mineral with a very low phosphate solubility, and a solid carbonate mineral which is slightly soluble in water. The matrix is sized such that there is sufficient contacting between the water and the matrix to form a lead phosphate precipitate, reduce the lead concentration in the water to below 15 parts per billion, and suppress the phosphate ion concentration to 5 mg/L, preferably 3 mg/L, or below.

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