الفهرس 
Determination Of Cadmium Toxicity on Faba Bean Grown in Soil Amended with BiocharOnly 14 pages are availabe for public view
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Abstract
Agricultural soil is one of the most important sources of food contamination with heavy metals. This contamination occurs through contaminated irrigation water or through the use of pesticides, as these minerals travel through the vascular system of the plant.
Cadmium is one of the most dangerous heavy metals that can be found in plants, which in turn is transmitted to animals and humans. This study aims to get rid of the damage of heavy
metals (Cd) in agricultural soil and prevent their access to the plant or reduce their access as much as possible. Biochar was used to study its effect on the presence of cadmium, whether
in the soil or plant parts. The most important results obtained in this study can be summarized in the following points:
1- The faba bean plant Cv.(Nubaria 1) was cultivated in clay and sandy soils. Biochar rates used in this study were added to soil ate the rate of 0.5, 1, and 2%, and irrigated with water contaminated with cadmium at the rates of 0.01, 0.1, and 1 mg / liter. The results obtained at three periods, after 60, 90 and 112 days of cultivation.
2- The characterization of the biochar was done by taking pictures with adetermined through investigating the pictures were done by scanning electron microscope (SEM), which
showed the holes carried by the biochar, whether micrometric or nanoscale. Then an examination was made of the surface active aggregates present in the biochar through the
FTIR device, and the aggregates that help in restricting pollutants were identified.
3- The results showed that after 60 days of cultivation in clay soil, the concentration of 1 and 2% of biochar had a significant effect on plant height, and it was found that cadmium
had an effect on plant height and number of branches, especially at the added levels of 0.1 and 1 mg/l of cadmium. While in the sandy soil, it was found that biochar had a significant
effect on plant height, especially the concentration of 1 and 2% of biochar, while cadmium showed no significant effect on any of the plant’s vital readings except for the number of
branches.
4- The results of cultivation after 90 days in the clay soil showed that biochar had a significant effect on all vital plant readings except number of pods and flowers especially concentration 2% of biochar, while cadmium had no significant effect on plants. While in sandy soil, biochar had an effect on all vital readings of the plant except for the number of
pods and branches, while cadmium had no significant effect on plants.
5- The results of cultivation in clay soil after 112 days showed that biochar had a significant effect on the number of leaves and pods, especially the concentration of 1 and 2%
of biochar, while cadmium had no significant effect on the plant readings. While in sandy
57 soil, biochar had a significant effect on all vital readings of the plant except for the number of pods and branches, and cadmium had no significant effect except on the number of pods.
6- The results obtained after removing plants from clay soil, separating the vegetative and root systems, taking the readings of wet and dry weights, the length of the root system and
the number of pods, showed that biochar had a significant effect on all readings, especially the concentration of 1 and 2% of biochar, while cadmium had a significant effect on all
readings except the fresh weight of the shoot system and the number of pods, especially the concentrations of 0.1 and 1 mg/l of cadmium. While in sandy soil, biochar had a significant
effect on all readings except for the length of the root system, the dry weight of the shoot system and the root system, especially the concentration of 1 and 2% of the biochar. As for
cadmium, it had no significant effect except on the dry weight of the shoot system, especially 1 mg/l concentration.