The Impact of Cl × Cd Interrelationship on Planning Wastewater Reuse in Cabbage
2011
Kalavrouziotis, Ioannis K. | Kostakioti, Eirini | Koukoulakis, Prodromos H. | Papadopoulos, Aristotelis H. | Leotsinidis, Michalis | Sakazli, Eleni
Two greenhouse pot experiments were conducted in Agrinion, Greece, using a randomized block design in four replications, respectively, as follows: The first one included five levels of treated municipal wastewater (TMWW), being used as an irrigation water source. The second one, five levels of applied Cl at a constant soil applied Cd level of 10.36 mg/kg soil, the plants being irrigated with fresh well water. The purpose of these experiments was to study the impact of the Cl × Cd interrelationship on planning TMWW reuse, for the irrigation of Brassica oleracea var. Capitata (cabbage) cv F1 Gloria, ehich was used as test plant, in both of these experiments. It was found that the TMWW Cl content, originating mainly from the procedure of wastewater chlorination, was synergistically interrelated with the toxic heavy metal Cd, increasing its soil availability and cabbage plant leaf uptake (edible plant part). As this increase is directly associated with the consumer's health, it was suggested that the TMWW be subjected to dechlorination process or the disinfection be made by ozonation or UV, which do not include Cl.
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