21. R.A.A. Muzzarelli and O. Tubertini. Chitin and chitosan as chromatographic adsorbents and supports for collection of trace metals from aqueous and organic solutions and sea water. TALANTA, 16, 1571-1579 (1969).

23. R.A.A. Muzzarelli, G. Raith and O. Tubertini. Separations of trace elements from sea water, brine and sodium and magnesium salt solutions by chromatography on chitosan. JOURNAL OF CHROMATOGRAPHY, 47, 414-420 (1970).

24. R.A.A. Muzzarelli and O. Tubertini. Purification of thallium (I) nitrate by chromatography on chitosan. MIKROCHIMICA ACTA, 892-899 (1970).

25. R.A.A. Muzzarelli. Uptake of nitrosyl 106-ruthenium on chitin and chitosan from waste solutions and polluted sea water. WATER RESEARCH, 4, 451-455 (1970).

26. R.A.A. Muzzarelli. Applications of natural polymers in marine ecology. REVUE INTERNATIONALE D'OCEANOGRAPHIE MEDICALE, 21, 93-103 (1971). Principauté de Monaco.

27. R.A.A. Muzzarelli. Selective collection of trace metal ions by precipitation of chitosan, and new derivatives of chitosan. ANALYTICA CHIMICA ACTA, 54, 133-142 (1971).

28. R.A.A. Muzzarelli and A. Isolati. Methyl mercury acetate removal from waters by chromatography on chelating polymers. WATER, AIR AND SOIL POLLUTION, 1, 65-71 (1971).

29. R.A.A. Muzzarelli and L. Sipos. Chitosan for the collection from seawater of naturally occurring zinc, cadmium, lead and copper. TALANTA, 28, 853-838 (1971).

30. R.A.A. Muzzarelli. Applications of chitosan (polyglucosamine) as a chelating polymer for the collection of metal ions from natural waters and from industrial solutions. KEM-TEK 2° CONGRESS PROCEEDINGS, Copenhagen, 2-4 NOV 1971.

31. R.A.A. Muzzarelli. Recupero di elementi di transizione dall'acqua di mare e da soluzioni, mediante polimeri chelanti. CHIMICA ANALITICA E CHIMICA FISICA DELLE ACQUE, Federazione Ass. Scientifiche e Tecniche, Milano 1971.

32. R.A.A. Muzzarelli. Collection of trace metals by precipitation of chitosan, a chelating polymer. PROCEEDINGS VI INTERNATIONAL SYMPOSIUM ON MICROTECHNIQUES, Graz, Austria, 1971.

33. R.A.A. Muzzarelli and M. Marinelli. Uso del chitosano per il rilevamento e la prevenzione degli inquinamenti da metalli tossici. INQUINAMENTO, 14(4), 27-34 (1972).

34. R.A.A. Muzzarelli and M. Marinelli. Uso del chitosano per il rilevamento e la prevenzione degli inquinamenti da metalli tossici. Parte II. INQUINAMENTO, 14(4), 30-35 (1972).

35. R.A.A. Muzzarelli, R. Rocchetti and G. Marangio. Separation of zirconium, nobium, cerium and ruthenium for the determination of cesium in nuclear fuel solutions. JOURNAL OF RADIOANALYTICAL CHEMISTRY, 10, 17-26 (1972).

36. R.A.A. Muzzarelli and B. Spalla. Removal of cyanide and phosphate traces from brines and seawater on metal ion derivatives of chitosan. JOURNAL OF RADIOANALYTICAL CHEMISTRY, 10, 27-35 (1972).

40. R.A.A. Muzzarelli and R. Rocchetti. The determination of molybdenum in sea water by hot graphite atomic absorption spectrometry after concentration on p-aminobenzyl cellulose or chitosan. ANALYTICA CHIMICA ACTA, 64, 371-379 (1973).

41. R.A.A. Muzzarelli and R. Rocchetti. The determination of copper in sea water by atomic absortion spectrometry with a graphite atomizer, after elution from chitosan. ANALYTICA CHIMICA ACTA, 69, 35-42 (1974).

42. R.A.A. Muzzarelli and R. Rocchetti. The determination of vanadium in sea water by hot graphic atomic absorption spectrometry on chitosan, after separation from salt. ANALYTICA CHIMICA ACTA, 70, 283-289 (1974).

44. R.A.A. Muzzarelli and R. Rocchetti. Enhanced capacity of chitosan for transition metal ions in sulfuric-sulfate solutions. TALANTA, 21, 1137-1147 (1974).

47. R.A.A. Muzzarelli and R. Rocchetti. The use of chitosan columns for the removal of mercury from waters. JOURNAL OF CHROMATOGRAPHY, 96, 115-121 (1974).

56. R.A.A. Muzzarelli, R. Rocchetti and M.G. Muzzarelli. The isolation of cobalt, nickel and copper from manganese nodules by chelation chromatography on chitosan. SEPARATION SCIENCE AND TECHNOLOGY, 13, 153-163 (1978).

52. R.A.A. Muzzarelli. Determinazioni di tracce di metalli in acqua marina. GIORNALE DI GEOLOGIA, 40, 123-125 (1976). Museo Geologico di Bologna.

60. R.A.A. Muzzarelli. Modified chitosans and their chromatographic performances, in, PROCEEDINGS OF THE FIRST INTERNATIONAL CONFERENCE ON CHITIN/CHITOSAN, R.A.A. Muzzarelli and E.R. Pariser, eds., Massachusetts Institute of Technology Press, Cambridge, USA, 1978.

62. R.A.A. Muzzarelli, F. Tanfani, M.G. Muzzarelli and G.F. Scarpini. Ligand-exchange chromatography of amino-acids on copper-loaded chitosan. SEPARATION SCIENCE AND TECHNOLOGY, 13, 869-679 (1978).

75. R.A.A. Muzzarelli, F. Tanfani, G.F. Scarpini and E. Tucci. Removal and recovery of cupric and mercuric ions from solutions using chitosan-glucan from Aspergillus niger. JOURNAL OF APPLIED BIOCHEMISTRY, 2, 54-59 (1980).

76. R.A.A. Muzzarelli, F. Tanfani, M. Emanuelli and S. Gentile. The chelation of cupric ions by chitosan membranes. JOURNAL OF APPLIED BIOCHEMISTRY, 2, 380-389 (1980).

77. R.A.A. Muzzarelli, F. Tanfani, M. Emanuelli. The chelating ability of chitinous materials from Streptomyces, Mucor rouxii, Phycomyces blakesleeanus and Choanephora cucurbitarum. JOURNAL OF APPLIED BIOCHEMISTRY, 3, 322-327 (1981).

114. R.A.A. Muzzarelli. Removal of uranium from solutions and brines by a derivative of ascorbic acid and chitosan. Carbohydrate Polymers, 5, 85-89 (1985).

116. R.A.A. Muzzarelli, F. Tanfani, M. Emanuelli and L. Bolognini. Aspartate glucan, glycine glucan and serine glucan for the collection of cobalt and copper from solutions and brines. BIOTECHNOLOGY AND BIOENGINEERING, 27(8), 1115-1121 (1985).

126. R.A.A. Muzzarelli. The chelating ability of aminoacid glucans and sugar acid glucans. In CHITIN IN NATURE AND TECHNOLOGY. R.A.A. Muzzarelli, C. Jeuniaux and G.W. Gooday, eds., Pp. 321-330. Plenum Press, New York, 1986.

131. R.A.A. Muzzarelli and A. Zattoni. Glutamate glucan and aminogluconate glucan: new chelating polyapholytes obtained from chitosan. INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, 8, 137-142 (1986).

136. R.A.A. Muzzarelli, F. Bregani and F. Sigon. Chelating capacities of aminoacid and sugar acid glucans derived from chitosan. IMMOBILIZATION OF IONS BY BIO-SORPTION. H. Eccles and S. Hunt eds., Pag. 173-182. Ellis Horthwood, Chichester, 1986.

137. R.A.A. Muzzarelli and R. Rocchetti. Metal adsorption by modified chitins. TRACE METAL REMOVAL FROM AQUEOUS SOLUTIONS. R. Thompson ed., The Royal Soc. Chemistry, London, 1986.

157. R.A.A. Muzzarelli, M. Weckx, O Filippini and F. Sigon. The removal of trace metal ions from industrial waters, nuclear effluents and drinking water with the aid of cross-linked carboxymethyl chitosan. Carbohydrate Polymers, 11, 293-306 (1989).