Abstract
Significant stress factors for plants growth media are represented by nutrients (deficiency or excess), water, light, and heat, as well as by different industrial wastes. It is well known, for example, that heavy metals toxicity has a damaging action on plants metabolism, affecting their normal growth process. In our study, the phytotoxicity of industrial wastes (thermo-power station ash, effluents from a pre-bleaching stage performed on a kraft cellulose-chlorinated lignin products-) was evaluated in hydroponics experiments, along with using of an excess of some metals (Zn and Cu). The sensitivity of three plant species, namely Triticum aestivum L. (wheat), Secale cereale (rye), and Zea mays (corn) were compared. These plant species were cultivated in hydroponics media, containing the industrial wastes and metal excess mentioned above. Physiological aspects, evidenced both by visual observation, and biometric measurement (plants average height), as well as the chemical composition (cellulose and lignin content) were examined.
Published Version
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