id	keyword
alkej-944	water
alkej-944	alkalinity
alkej-944	time
alkej-944	electrocoagulation
alkej-944	hardness
alkej-944	fig
alkej-944	min
alkej-944	river
alkej-944	process
alkej-944	vol
alkej-944	treatment
alkej-944	polarity
alkej-944	reversal