Health and environment
Amirhossein Baghaie; Mehran Keshavarzi
Volume 26, Issue 3 , September and October 2019, , Pages 293-302
Abstract
soil pollution to heavy metals is elevating that is dangerous for human health. According to this, mining activities to extract different heavy metals such as Pb and Cd can increase soil pollution. Thus, this research was done to evaluate Health risk assessment of heavy metals (Cd and Pb) in greenhouse ...
Read More
soil pollution to heavy metals is elevating that is dangerous for human health. According to this, mining activities to extract different heavy metals such as Pb and Cd can increase soil pollution. Thus, this research was done to evaluate Health risk assessment of heavy metals (Cd and Pb) in greenhouse products harvested from greenhouses around Irankooh mine.Materials and Methods: In this study 10 cucumber, tomato and bell pepper greenhouses were selected randomly around Irankooh mine. At the time of harvest, fruit and soil sampling were done. In each sampling, 10 fruit samples of each products and soil surface from different parts of greenhouses were randomly selected for analysis.Results: The highest and lowest daily intakes of Cd and Pb in the group age of 3-6 were determined with daily consumption of 55 and 100 g bell pepper and cucumber, respectively. The same results were observed for adult people in the age 18-35. The hazard quotient of Cd for all age groups was greater than the Pb hazard quotient. The highest hazard quotient of both Cd and Pb were due to the dermal contact with polluted soil and the lowest of them results from oral way. Conclusions: The results of this research were shown that high Pb and Cd concentration in the greenhouse vegetable which produced around Irankkoh is an important concern for consumers health of these vegetables that should be more considered.
Health and environment
Amirhossein Baghaie
Volume 25, Issue 5 , November and December 2018, , Pages 659-668
Abstract
Background: Interaction effect of heavy metal and some metals such as Fe can affect soil heavy metal availability. Thus, this research was conducted to investigate the effect of Arak municipal sewage sludge compost with iron slag on decreasing cadmium uptake by pot marigold. Materials and methods:: Treatments ...
Read More
Background: Interaction effect of heavy metal and some metals such as Fe can affect soil heavy metal availability. Thus, this research was conducted to investigate the effect of Arak municipal sewage sludge compost with iron slag on decreasing cadmium uptake by pot marigold. Materials and methods:: Treatments were consist of applying enriched Arak municipal sewage sludge compost (0, 15 and 30 t ha-1) with 0 and 5% pure Fe from iron slag of Mobarakeh Steel Complex in a polluted soil (0, 5, 10 and 15 mg Cd kg-1 soil). After 60 days, soil physic-chemical properties and root and shoot Cd concentration of pot marigold was measured and the least significant difference (LSD) statistical analysis was used to determine the differences between the means (p=0.05).Results: Increasing the loading rate of Arak municipal sewage sludge compost from 0 to 15 and 30 t ha-1 in a Cd polluted soil (10 mg Cd soil-1) caused a decreasing in Cd availability by 15 and 35 percent, respectively, while the Fe availability increased by 5.6 and 8.4 times, respectively. Similar to this result, root and shoot Cd concentration was decreased by 24 and 18%, respectively. Conclusion: The result of this study showed that applying sewage sludge compost enriched with 5% Fe pure can probably affect soil physico-chemical properties that increasing soil and plant Fe availability and thereby, decreasing Cd availability.
Afshin Takdastan; Mehdi Jolanejad; Abdolkazem Neisi; Mehrnosh Abtahi; Sahand Jorfi
Volume 23, Issue 4 , September and October 2016, , Pages 698-705
Abstract
Background Chromium and cadmium are two heavy metals having adverse effects on the health and environment, which are released to environment by waste streams. Because of high solubility, they are absorbed by living organisms and through food chain accumulate in human body. This study aimed to determine ...
Read More
Background Chromium and cadmium are two heavy metals having adverse effects on the health and environment, which are released to environment by waste streams. Because of high solubility, they are absorbed by living organisms and through food chain accumulate in human body. This study aimed to determine the efficiency of the polyferric sulfate (PFS) in removing of Cr6+ and Cd2+ from aqueous solutions.Methods & Materials This study was investigated in bench scale using a jar test apparatus. The effect of pH (4-11), dose of coagulants (10-200 mg/l), initial amount of metals (1-100 mg/l) and settling time (15-9 min) were investigated. Cr and Cd concentration were determined by atomic absorption spectroscopy.Results The result showed that the maximum removal efficiency was 52.82% for Cr and 93.13% for Cd, at pH values of 6 and 9, coagulant dosage of 100 and 50 mg/l, respectively, and settling time for 30 min. Conclusion Coagulation and sedimentation by use of polyferric sulfate can be considered as an efficient process for removal of Cd and pretreatment of Cr.