S452 : The effects of some natural absorbents on the plant removal of heavy mextals from contaminated soil
Thesis > Central Library of Shahrood University > Agricultural Engineering > MSc > 2018
Authors:
Fateme Ghorbani Erandegan [Author], Hadi Ghorbani[Supervisor], Mostafa Heidari[Advisor]
Abstarct: The presence of heavy mextals in the soil is due to human and natural activities, one of the human activities is the excessive use of agricultural fertilizers, pesticides, urban sewage, colored materials, mines, batteries, and from natural activities we can point out the formation of bedrock and the shredding of material these activities have led to the entry of heavy mextals such as lead, zinc and cadmium into the environment, including water and soil. In this study, to study the effect of biocurrents and zeolite as a natural absorbent on the absorption of heavy mextals by spinach from contaminated soils, a factorial experiment was conducted in a completely randomized design with 42 treatments and 3 replications in the greenhouse of Shahroud Agricultural College, in this design, treatments including normal adsorbent in six levels of rice bran (2.5 and 5% by weight of soil) and juniper (2.5 and 5% by weight of soil) and zeolite (2.5 and 5% by weight of soil) as the first factor also, in two levels of lead (50 and 100 mg/kg soil) from the source of lead nitrate and cadmium in two levels (10 and 20 mg/kg soil) from the source of cadmium nitrate and zinc in two levels (100 and 200 mg/kg soil) the zinc nitrate source was used. From zinc nitrate, cadmium nitrate and lead nitrate were used to create different levels of contamination in an unpolluted soil. It was prepared from natural products (rice bran and jujube) and heated at 300-500 C for one hour .the Natural zeolite was then thinned and thinned as soon as possible after preparation. The results of this study showed that addition of adsorbent to soil was effective on fresh weight of spinach. And for lead and cadmium, each was separately treated with adsorbent at 1% level, and for interaction of pollutant and absorbent at 5% level on fresh weight of shoot was significant. The addition of rice bran, unrooted jujube and zeolite had a significant effect on plant dry weight. Adding zeolite caused a significant decrease in dry weight of spinach. The highest amount of lead absorption belonged to biochemical products, the highest amount of cadmium adsorption was obtained by using rice bran and the highest amount of adsorption was obtained by zeolite.
Keywords:
#Biochar #Zeolite #Zinc #Cadmium #Lead (Pb) #Spinach Link
Keeping place: Central Library of Shahrood University
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