id	keyword
alkej-851	carbon
alkej-851	activation
alkej-851	vol
alkej-851	microwave
alkej-851	heating
alkej-851	doi
alkej-851	chemical
alkej-851	surface
alkej-851	preparation
alkej-851	impregnation
alkej-851	area
alkej-851	time
alkej-851	waste
alkej-851	adsorption
alkej-851	temperature