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Food name Side stream Component group Component Value Unit Description Reference
Rice Rice husk Inorganics Silicon dioxide (SiO2) 88.94 % ash Before soaking pre-treatment A detailed study of the effects of pyrolysis temperature and feedstock particle size on the preparation of nanosilica from rice husk
Nuts, unspecified Nut hulls Inorganics Silicon dioxide (SiO2) 7.12 % ash Almond, shells (hulls) ECN Phyllis 2
Courgette Courgette plant Inorganics Silicon dioxide (SiO2) 4.79 % ash ECN Phyllis 2
Nuts, unspecified Nut hulls Inorganics Silicon dioxide (SiO2) 22.6 % ash Almond, shells (hulls). Ash type: grinding, 60 mesh, 14 hours at 575 degC. Ash fusion temperatures according to ASTM D-1857 ECN Phyllis 2
Tomatoes Tomato plant Inorganics Silicon dioxide (SiO2) 10.2 % ash C,H and N determined according to UNE-CEN/TS 15104:2008 EX. S according to ASTM D4239-08, Cl according to ASTM E776-87. Erroneous data for ash metal content corrected after consultation with authors. ECN Phyllis 2
Nuts, unspecified Nut shells Inorganics Silicon dioxide (SiO2) 27.3 % ash Hazelnut. Extractive matter (alcohol/benzene 1/1) 3.3%; cellulose etc. extractive-free ECN Phyllis 2
Nuts, unspecified Nut shells Inorganics Silicon dioxide (SiO2) 10.7 % ash Almond. Extractive matter (alcohol/benzene 1/1) 2.7%; cellulose etc. extractive-free ECN Phyllis 2
Sugar beet Sugar beet Inorganics Silicon dioxide (SiO2) 21.7 % ash ECN Phyllis 2
Cotton Cottonseed husks Inorganics Silicon dioxide (SiO2) 0.4 % ash Israel ECN Phyllis 2
Olive Olive residue Inorganics Silicon dioxide (SiO2) 33.1 % ash Orujillo, produced and collected in Andalusia, Spain, sample 1 ECN Phyllis 2