AAS based soil analysis showed that the lead was uniformly present throughout the field. The lead content in the soil ranged between 9.90 and 11.96 lg/g in both the layers. However, wide variation in all the four volatile and non-volatile metals has been observed in the 25 ginger rhizome samples analysed from N-W Himalayan states of India. Lead contributed to 82% of all the metals from Utt (Fig. 2a), while the same from HP was 71% (Fig. 2b). Of the entire metals load among the ginger samples, Pb was found to be the highest (75%), as represented in Fig. 2c. The overall variation and variation from Utt was ten folds while samples from HP varied four folds in their lead contents. Five samples from Utt, as against three from HP, had leadP0.50 lg/g. The lowest content of lead was reported from Utt (Nainital) which had the value of 0.06 lg/g as against 0.14 lg/g from Sirmour, HP. The mode, median and average values for the metal were equal (0.3 lg/g) which was equal to the overall average of the 25 samples and Utt values, and lower than the HP average of 0.34 lg/g. Fifty-eight percent of samples from Utt had lead more than the average. Lead can be absorbed from air, soil and water by the plants. Earlier study done on spices, available in Polish market, have shown similar results, where lead (in ginger samples) was within the range of 0.21– 0.78 lg/g (Krejpcio et al., 2007). The same from Nigeria was averaged to 0.26 lg/g as reported by Ajasa et al. (2004). However, lead
was found in much higher concentrations in a study on ginger by Naithani and Kakkar (2006) where it ranged from 3.44 lg/g (Shimla, HP) to 8.83 lg/g from Kolkata, India. Despite the even distribution of the metal in the soil, large variation in lead concentration was observed in the rhizome. Lead is the most recognized toxic environmental pollutant. It reacts or complexes with many biomolecules and adversely affects the human biology (Johnson, 1998). Lead present in food and water account for approximately 70% of the total lead intake in humans. It can cross the placental barrier with potential toxic effects on the fetus. Infants and young children are more vulnerable than adults to the toxic effects of lead.
AAS based soil analysis showed that the lead was uniformly present throughout the field. The lead content in the soil ranged between 9.90 and 11.96 lg/g in both the layers. However, wide variation in all the four volatile and non-volatile metals has been observed in the 25 ginger rhizome samples analysed from N-W Himalayan states of India. Lead contributed to 82% of all the metals from Utt (Fig. 2a), while the same from HP was 71% (Fig. 2b). Of the entire metals load among the ginger samples, Pb was found to be the highest (75%), as represented in Fig. 2c. The overall variation and variation from Utt was ten folds while samples from HP varied four folds in their lead contents. Five samples from Utt, as against three from HP, had leadP0.50 lg/g. The lowest content of lead was reported from Utt (Nainital) which had the value of 0.06 lg/g as against 0.14 lg/g from Sirmour, HP. The mode, median and average values for the metal were equal (0.3 lg/g) which was equal to the overall average of the 25 samples and Utt values, and lower than the HP average of 0.34 lg/g. Fifty-eight percent of samples from Utt had lead more than the average. Lead can be absorbed from air, soil and water by the plants. Earlier study done on spices, available in Polish market, have shown similar results, where lead (in ginger samples) was within the range of 0.21– 0.78 lg/g (Krejpcio et al., 2007). The same from Nigeria was averaged to 0.26 lg/g as reported by Ajasa et al. (2004). However, lead
was found in much higher concentrations in a study on ginger by Naithani and Kakkar (2006) where it ranged from 3.44 lg/g (Shimla, HP) to 8.83 lg/g from Kolkata, India. Despite the even distribution of the metal in the soil, large variation in lead concentration was observed in the rhizome. Lead is the most recognized toxic environmental pollutant. It reacts or complexes with many biomolecules and adversely affects the human biology (Johnson, 1998). Lead present in food and water account for approximately 70% of the total lead intake in humans. It can cross the placental barrier with potential toxic effects on the fetus. Infants and young children are more vulnerable than adults to the toxic effects of lead.
การแปล กรุณารอสักครู่..
