Does purified water remove ritual impurity?

The default rule is that the removal of ritual impurity (hadath) is only achieved with pure water (al-ma' al-mutlaq), which is water that remains in its original created state and has not been mixed with any impure or pure substance that alters any of its characteristics. If recycled water can be described as pure water, then purification with it is valid, and it removes ritual impurity and cleanses from filth.

Sheikh Ibn 'Uthaymeen was asked about recycling water contaminated with impurities until it becomes pure again. He replied that in this case, there is no doubt about the purity of the water, and it is permissible to use it for human purification and for drinking, because it has become pure as the effect of the impurity—taste, smell, and color—has vanished. He cited the hadith: "Indeed, water is not defiled by anything except what overcomes its smell, taste, and color," and pointed out that this hadith has a weak chain of transmission but is sound in meaning. He supported this by stating that a ruling revolves around its cause, whether it exists or ceases to exist, and that jurists have explicitly stated that if a large quantity of water loses its alteration, it becomes pure.

However, if the recycling process does not remove the effect of the impurity, then it is not permissible to use it unless the smell, taste, or color of the water has not changed due to it.