This report discusses a technically viable and economically reasonable approach for removing perchlorate from drinking water, to tailor activated carbon in such manner as to extend its bed life for removing perchlorate, and to explore means of regenerating the activated carbon so that it can be reused to remove perchlorate. In situ treatments, such as bioremediation via perchlorate-selective microbes and permeable reactive barrier, are also being used to treat perchlorate.
Researchers at Pacific Northwest National Laboratory have demonstrated a new, environmentally friendly process for treating water contaminated by perchlorate, a toxic chemical that has been found in drinking water in 35 states.
The recent discovery of perchlorate (ClO 4 −) in several groundwater wells in Nevada, California, and Utah, has generated considerable interest in potential treatment technologies to remove the contaminant from water supplies.Biological and physico-chemical treatment technologies are currently under investigation for their potential to economically remove perchlorate from waters. The recent discovery of perchlorate (ClO 4 −) in several groundwater wells in Nevada, California, and Utah, has generated considerable interest in potential treatment technologies to remove the contaminant from water supplies.Biological and physico-chemical treatment technologies are currently under investigation for their potential to economically remove perchlorate from waters. In general, perchlorate is not difficult to treat for, but what can be challenging is treating the low concentrations at which perchlorate is found and handling the large volumes of water that require processing. In situ bioremediation has advantages of minimal above-ground infrastructure and its ability to treat chlorinated solvents, perchlorate, nitrate, and RDX simultaneously. Table 6 gives a summary of various bioreactors used for treating perchlorate containing water. Trace parts per billion levels have been detected in potable water supplies in at least 22 states.
Regenerable and single-pass ion exchange, reverse osmosis, and fixed- and fluidized-bed biological treatment can all remove perchlorate from drinking water sources. perchlorate removal...the 'green' way. Do strong base anion resins remove the perchlorate (ClO₄¯) ion from water. Fluidized bed reactors (FBR) and packed bed reactors (PBR) are two types of bioreactors widely used for removal of perchlorate. While the debate on perchlorate contamination continues, many municipalities are faced with the responsibility of removing perchlorate from their drinking water systems.
Biological processes break down the perchlorate into harmless chloride ions (Cl-) … Resinex™ PR-1 is selective macroporous strong base anion resins in the chloride form especially tailored to remove perchlorates.. Resinex™ PR-1 has a special macroporous structure which leads to a greater affinity for nitrate, nitrite and perchlorate than for any other anionic species including sulphates (SO₄²¯). Perchlorate is a major health issue, particularly in the USA. In general, perchlorate is not difficult to treat for, but what can be challenging is treating the low concentrations at which perchlorate is found and handling the large volumes of water that require processing. Several different types of bioreactors have been proposed to remove perchlorate from water using mixed and pure cultures of bacteria . Even though the US EPA has yet to set a MCL, perchlorate is now regulated by several states at maximum levels ranging from 1 ppb to 6 ppb. Abstract. Each technology has advantages and disadvantages depending on the level of perchlorate present in the source water, removal goals, other water quality parameters, competing treatment objectives, and treatment waste disposal options. plant which deliver water to homes. Perchlorate can be removed from drinking water or groundwater by physical-chemical processes such as ion exchange or reverse osmosis, but these processes produce waste brine that can be challenging to manage. Although some early installations of ion exchange resins for perchlorate removal suffered from relatively high treatment costs, the technology has been evolving in recent years.