Studies on biodegradable chelating ligands: complexation of iminodisuccinic acid (ISA) with Cu(ii), Zn(ii), Mn(ii) and Fe(iii) ions in aqueous solution

Complexation of iminodisuccinic acid (IDS) and 3-hydroxy-2,2′-iminodisuccinic acid (HIDS) with Cd2+, Hg2+, and Pb2+ in aqueous solution

“…The equilibrium constants for reactions (4) and (5) obtained in the final refinements are listed in table 1. The results correspond with those of earlier studies on protonation of IDS [15] and HIDS [16] in 0.1 mol L À1 NaCl. For comparison with EDTA and DTPA [17], the protonation of IDS and HIDS is rewritten in the form given in table 2.…”

“…IDS has been tested in a pulp bleaching application where both EDTA and DTPA are commonly used for the removal of transition metal ions from pulp [13] and in a plant growth application [14]. In addition, complexation studies on both of these potential new chelating agents have been carried out with several metal ions [15][16][17].…”

Influences of the operational variables on electrochemical treatment of chelated Cu(II) in alkaline solutions using a membrane cell

“…To reduce the problems associated with the separation of chelated heavy metals and the degradation of the resulting chelating agents, the substitution of either biodegradable or functionally modified alternatives for conventional ones such as ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), and nitrilotriacetic acid (NTA) has been considered a viable option. In addition, using alternative treatment techniques to minimize the loss of chelating agents and recycle them from industrial effluents has been recommended for economic and practical reasons…”

Iron supply to soybean plants through the foliar application of IDHA/Fe3+: effect of plant nutritional status and adjuvants

“…Fe chelates applied to soils are the most efficient remedy to control Fe chlorosis. Most of these chelates degrade very slowly in the environment, and concern about the environmental risk of their application4 has grown in recent decades. Moreover, the risk of leaching out of the root zone in regimes of high water availability, which can be very high for the highly efficient chelate EDDHA/Fe 3+ ,5 constitutes an important constraint when synthetic chelates are applied to soils 6.…”