39 s dried pulp in barrier applications which may be multi layered as set out in the fourth aspect of the present invention the use of the cellulose according to the second and third aspect may be especially desirable in packaging of electronic equipment or when making solar cells or batteries from cellulose due to purity the purified cellulose according to the second and third aspect can be present as low metal pulps as such they may be useful for low conductivity paper due to di electrical properties enzyme treatments of pulps or as pulp for chemical modifications the purified cellulose according to the second and third aspect in the form of microfibrillated cellulose may be especially useful in the following applications uses barriers due to improved film forming properties washing powders due to improved ca 2 removal absorbs adsorps or in other similar applications where hard water is a problem cleaning drinking water as it is possible to achieve improved heavy metal removal from drinking waters this is still a large problem in some areas of word by oxidation and different additives one can improve metal absorption properties metal absorbents which are biodegradable preferred features of each aspect of the invention are as for each of the other aspects mutatis mutandis the prior art documents mentioned herein are incorporated to the fullest extent permitted by law the invention is further described in the following examples together with the appended figures the only purpose of which is to illustrate the invention and are in no way intended to limit the scope.