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Ligands sorption of ammonia, diethanolamine, and triethanolamine on the cation exchanger Amberlite IRC-50 having Cu²⁺, Ni²⁺, and Zn²⁺ ions was studied as a function of temperature 290−318 K and different initial concentrations 1−500 mmol·L^-1. Sorption was found to follow the order Cu²⁺ > Zn²⁺ > Ni²⁺ and ammonia > diethanolamine > triethanolamine. Desorption of metal cations from the exchanger to the aqueous phase was also observed when the temperature of the system was increased. The results were explained in terms of ligand sorption and ion exchange, which were found to be dependent upon the stabilities of the complexes inside the resin and in the aqueous solution and the basicity and hydrophobicity of the ligand involved. The ratio of metal released/amine sorbed was determined which indicated two possible mechanisms of ligand sorption. The data were explained with the help of mass action law. IR studies also confirmed the presence of metal complexes and metal−amine complexes inside the resin.

NaCl salinity affected growth, the contents of chlorophyll, carotenoids, saccharides and some minerals (Na, K, Ca, Mg, P) in wheat (Triticum vulgarisL.) plants. Irrigation of soil with CaCl2or KCl greatly ameliorated the adverse effects of NaCl salinity. This counteraction was associated with an increase in contents of saccharides, proteins and Ca, Mg and P which might explain their role in osmotic adjustment.

Salinity inhibited growth, and affected the contents of chlorophylls, carotenoids, saccharides, amino acids, proteins, DNA and RNA in broad bean plants. Foliar application of NaH2PO4and NaNO3greatly ameliorated the adverse effects of NaCI. This counteraction was associated with an increase in contents of saccharides, proteins, DNA and RNA.