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EFFECTS OF ZINC LEAD AND CADMIUM CONTAMINATION ON NITRATE CONTENTS IN PAKCHOI

Xu Zhang

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Abstract

The influences of zinc, lead and cadmium contamination on nitrate and nitrite contents in pakchoi (Brassica parichinensis) were investigated in a pot experiment. In the range of zinc, lead and cadmium levels adopted in this experiment, the growth of pakchoi was correlated negatively with Pb and Cd (Tt_(0.01)) and positively with Zn. Nitrate concentration in the plants increased with the levels of the heavy metals, the effect being significant statistically (Tt_(0.01)). Nitrate accumulation appeared in various treatments in the order of Cd Pb Zn. When the soil was treated with a single heavy metal, nitrate accumulation was positively correlated with the degree of heavy metal contamination of the soil.

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What this paper is about

The influences of zinc, lead and cadmium contamination on nitrate and nitrite contents in pakchoi (Brassica parichinensis) were investigated in a pot experiment. In the range of zinc, lead and cadmium levels adopted in this experiment, the growth of pakchoi was correlated negatively with Pb and Cd (Tt_(0.01)) and positively with Zn. Nitrate concentration in the plants increased with the levels of the heavy metals, the effect being significant statistically (Tt_(0.01)). Nitrate accumulation appeared in various treatments in the order of Cd Pb Zn. When the soil was treated with a single heavy metal, nitrate accumulation was positively correlated with the degree of heavy metal contamination of the soil.

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Available abstract

The influences of zinc, lead and cadmium contamination on nitrate and nitrite contents in pakchoi (Brassica parichinensis) were investigated in a pot experiment. In the range of zinc, lead and cadmium levels adopted in this experiment, the growth of pakchoi was correlated negatively with Pb and Cd (Tt_(0.01)) and positively with Zn. Nitrate concentration in the plants increased with the levels of the heavy metals, the effect being significant statistically (Tt_(0.01)). Nitrate accumulation appeared in various treatments in the order of Cd Pb Zn. When the soil was treated with a single heavy metal, nitrate accumulation was positively correlated with the degree of heavy metal contamination of the soil.

Key concepts: Cadmium, Zinc, Nitrate, Chemistry, Nitrite, Contamination, Brassica, Environmental chemistry

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