Application of barley straw to remove nitrate from drainage water
ABSTRACT-Nowadays farmers often use N-fertilizers to increase crop yield, but they lost quickly by leaching causes environmental contaminations that reported as most important source of pollutant. Although biofilters are useful for removing nitrate from drainage water, but many researches show that they need an external carbon source to sustain denitrification. Many researchers study on different method, but most of them need equipment or material that becoming use in laboratory experiment. So this study describes laboratory experiments that investigated nitrate removal with barley straw in different percentages layered or mixed with soil. Results showed that layering method was more effective for removing nitrate. The percentage of optimum volume mixture of barley straw in layering and mixing methods was 20% and 30% respectively, both removing approximately 80% of the influent nitrate. So barley straw can be used in a layered form as an effective, prompt, feasible and inexpensive method to remove nitrate.
this study aimed to develop techniques for purification of cyanotoxins dissolved in water -particularly those produced by microcystis aeruginosa species - using natural clay, chemically modifiednatural clay, commercial clay and ion exchange and adsorbent resins. except for natural clay, chemical pretreatment was required to increase the adsorption capacity of the treatment materials. all the cl...full text
Synthesis of Fe3O4 Nanoparticles Modified with Hyper Branched Dendrimers to Remove Anthracene from Contaminated Water
Introduction: Anthracene is one of the chemical and persistent pollutants released into the environment and the food chain causing irreparable damage to the immune system. This study aimed at removing anthracene from aqueous solutions using modified magnetic nanoparticles. Materials & Methods: Initially, Fe3O4 nanoparticles were synthesized with silicon dioxide shell and then modified with ...full text
Application of SWAT Model to Simulate Nitrate and Phosphate Leaching from Agricultural Lands to Rivers
In the present study, the amount of nitrate and phosphate leaching from agricultural lands into the Zanjanrood River in Iran was simulated using the Soil & Water Assessment Tool (SWAT) model. The measured average monthly discharges at the Sarcham station were used to calibrate and validate the SWAT model, and the SWAT Calibration and Uncertainty Program (SWAT-CUP) model was applied to perform t...full text
Fe3O4/CNT Magnetic Nanocomposites as Adsorbents to Remove Organophosphorus Pesticides from Environmental Water
In this study, a method for extraction and preconcentration of trace amounts of organophosphorus pesticides (OPPs) in environmental water using magnetic solid phase extraction (magnetic-SPE) followed by high performance liquid chromatography (HPLC) with UV detection was developed. The magnetic carbon nanotube adsorbents (Fe3O4/CNT) were synthesized by grafting carbo...full text
Adhesion of the cellulolytic ruminal bacteria Ruminococcus flavefaciens and Fibrobacter succinogenes to barley straw was measured by incubating bacterial suspensions with hammer-milled straw for 30 min, filtering the mixtures through sintered glass filters, and measuring the optical densities of the filtrates. Maximum adhesion of both species occurred at pH 6.0 and during mid- to late-exponenti...full text
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volume 36 issue 1
pages 105- 110
publication date 2022-06-22
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