Aluminium arsenite

Arai Y, Elzinga EJ, Sparks DL (2001) X-ray absorption spettroscopy investigation of arsenite and arsenate adsorption on the aluminium oxide-water interface J Colloid Interf Sci 235 80-88... 

Attention is directed to the fact that arsenites are reduced in alkaline solution by aluminium, Devarda s alloy, etc., to arsine, which blackens mercury(I) nitrate paper and also gives a positive tannic acid-silver nitrate test. Hence neither the mercury(I) nitrate test nor the tannic acid-silver nitrate test for ammonia is applicable if arsenites are present. 

Many of the important chemical reactions controlling arsenic partitioning between solid and liquid phases in aquifers occur at particle-water interfaces. Several spectroscopic methods exist to monitor the electronic, vibrational, and other properties of atoms or molecules localized in the interfacial region. These methods provide information on valence, local coordination, protonation, and other properties that is difficult to obtain by other means. This chapter synthesizes recent infrared, x-ray photoelectron, and x-ray absorption spectroscopic studies of arsenic speciation in natural and synthetic solid phases. The local coordination of arsenic in sulfide minerals, in arsenate and arsenite precipitates, in secondary sulfates and carbonates, adsorbed on iron, manganese, and aluminium hydrous oxides, and adsorbed on aluminosilicate clay minerals is summarized. The chapter concludes with a discussion of the implications of these studies (conducted primarily in model systems) for arsenic speciation in aquifer sediments. 

Sodium 34,44.115 129.429,434 Sodamide 62,156.260 Sodium acetate 14 104,321,403 Sodhjm arsenite 21 Sodium azide 83,159,179, 334 Sodium bis(2-methoxyemoxy (aluminium hydride SMEAH 60 Sodium borohydnde 2 Sodium carbonate 264 Sodium cyanide 128,374 Sodhjm cyanoborohydride 42,127,404 Sodhim dRhnnite 243 Sodhjm ethylate 61... 

The water soluble salts such as sodium arsenate sodium arsenite and potassium arsenite, attack aluminium [17]. On the other hand, calcium arsenate and lead arsenate, both with a very low solubility in water, only have a slight action on aluminium. 

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