فهرست مطالب arash borzou

Cadmium is one of the heavy metals, which the results of recent research indicate the severe biological toxicity, irreversibility, accumulation and non-degradability of this element in nature, and its accumulation in the soil causes a decrease in soil fertility and crop yields. One of the ways to improve the fertility of contaminated soils is the use of waste materials such as fly ash and its derivatives. The aim of this study was to investigate the effect of fly ash derivatives and genotype treatments on rice yield. The experiments of two cropping years 2019-2020 and 2020-2021 were performed in two forms of field and pot cultivation in private lands located in Kheyber town of Dezful city. This research was done by split plot method and in the form of randomized complete block design. The main factor included four amendments; soil with zero ash (as control), ash, intermediate material and zeolite. The sub-factor included two cultivars; Champa and Anbarbo. The studied traits are grain yield and plant dry weight. Comparison of treatment averages were done by Duncan's method and at two probability levels of 1% and 5%. According to the results, the effect of fly ash treatment and its derivatives on rice yield had a significant effect at 1% level. Genotype also had a significant effect on rice yield at 1% level. Also, the interaction effect of fly ash treatment and derivatives and genotype treatment had a significant effect on rice yield at 1% level. So that the lowest and the highest amount of yield with the amount of 3065.42 and 3555.96 kg/ha in the field experiment and 3162.54 and 3668.1 kg/ha in the pot experiment were corresponeded to the control treatment and Anbarbo variety and fly ash Champa treatments respectively. It was found that the treatment of fly ash and Champa variety was statistically higher than the other treatments at 5% level according to Duncan's test. According to the comparison results, the highest yield in both field and pot tests was observed in intermediates treatment and Champa variety.

This study in order to investigate the purification of forage safflower plant under heavy cadmium metal contamination conditions by foliar application using of dalgin growth stimulant in a completely randomized design with four replications in the Faculty of Agriculture of Islamic Azad University, Varamin - Pishva Branch in 2019 was conducted.  The applied factors in this study were included cadmium at zero (control), 50 and 100 mg/kg soil levels and dalgin foliar application at zero (control) levels was 1 and 2 per thousand. The results showed that cadmium was decreased shoot length (%31.28), root length (%41.35), wet and dry weight of shoot (%60.46 and %44.69), wet and dry weight of root (%26.77 and %58.11), leaf surface index (%52.05), relative leaf water content (%39.74), chlorophyll (%22.54) and catalase enzyme activity (%10.73) and was increased proline (%164.38), malondialdehyde (%88.1) and cadmium of aerial and root organs concentrations. The most effect of cadmium was obtained in the treatment of 100 mg.kg of soil. It was also observed that the using of dalgin could increase shoot length, root length, wet and dry weight of the shoot and root, leaf surface index, relative leaf water content, chlorophyll and cadmium concentration of aerial and root organs and could decrease proline and malondialdehyde. In general, the most positive effect in using of one per thousand of dalgin was obtained. From the obtained results, it can be found the positive effects of dalgin, especially in the presence of cadmium, and the reduction of the negative effects of stress in the forage safflower. Therefore, the using of one per thousand of dalgin to increase the plant refining of heavy metal cadmium stress by forage safflower is recommended.

Today, freshwater ecosystems polluted by heavy metals such as cadmium(cd2+) and lead(Pb2+) in Iran and other countries is an important environmental problem. Discharge of sewage and waste water into surface waters is one of the most important sources of heavy metals pollutions. Surface adsorption of heavy metals by polymer from waste water is one of the most recommended methods for water resource filtration. Poly (ethylene terephthalate) – Grafted – 2- Hydroxy Propyl Methacrylate was used as surface adsorbent in this study. The properties of produced adsorbent were studied. The results were showed that the contact between 1M NaOH and sorbent was not significant change in sorption properties. The adsorbent were used for filtration of Cd2+ and Pb2+ ions from pure laboratory solution and Isfahan steel factory wastewater. The results were showed that the maximum adsorption capacity for Cd2+ and Pb2+ were 23.44 and 20.9 mg/g respectively. The comparison of filtration Cd2+ and Pb2+ from pure laboratory solution and Isfahan steel factory wastewater were showed that the amount of Cd2+ filtration from both solutions were equal. The removal of Pb2+ from Isfahan steel factory wastewater was equal 54% of adsorption amounts from pure laboratory solution. The results proved that the produced adsorbent was useful for removal of cd2+ and Pb2+ from wastewater.