ABSTRACT Hydrogels can absorb irrigation and rain water help to reduce deep percolation by using gravitational as well capillary water. The objective of this study was evaluate the effect hydrogels on soil retention characteristic curve (WRC) RETC computer model. hydrogels, PR3005A Tarawat A100 in four levels, 2, 4, 6, 8 g/kg, were mixed with three textures, sandy loam, loamy clay. results showed that for each texture, caused residual content (θ r ) saturated s increase. Air entry value (h b...

This study was carried out to investigate the effect of treated wastewater on soil chemical and physical properties. Field experiment conducted in Borkhar region Isfahan province central Iran with two water treatments groundwater under sprinkler surface irrigation systems for three crops sugar beet, corn sunflower. Soil samples were collected 120 cm depth determine concentration lead (Pb), manganese (Mn), iron (Fe), cadmium (Cd), nickel (Ni), cobalt (Co), copper (Cu) zinc (Zn). Irrigation...

ABSTRACT A novel hydrogel was synthesized through the graft copolymerization of acrylic acid (AA) and acrylamide (AM) onto sodium alginate with ammonium persulfate as initiator, methylene bisacrylamide crosslinking agent, calcium chloride precipitating agent. Rapeseed meal biochar made at 300 °C also used. series copolymers various molar ratio AA to AM prepared. The structures hydrogels were characterized by Fourier transform infrared spectroscopy scanning electron microscopy. free...

Abstract The potential evapotranspiration is considered as an important element of the hydrological cycle, which plays role in agricultural studies, management plans irrigation and drainage networks, hydraulic structures. Estimating reference particular climatic regions at different time scales, one most atmospheric parameters, a importance optimal use resources. series analysis method, GARCH model, applied order to investigate changes estimate evapotranspiration. In present study,...

The increase of the global population and requirement food production agricultural development, combined with a lack water resources, have led to human attention being drawn unconventional sources, including saline wastewater. Most treatment methods are not cost-effective; however, researchers become interested in phytoremediation method due its cost-efficient eco-friendly removal many pollutants recent years. Research showed that unique characteristics, vetiver grass can be useful...

A report on the synthesis and characterization of nanoscale zero-valent iron in presence natural zeolite as a stabilizer is presented. This novel adsorbent (Ze-nZVI) was synthesized by sodium borohydride reduction method. The scanning electron microscopy (SEM) images revealed that stabilized nZVI particles were uniformly dispersed across surface without obvious aggregation. Ze-nZVI material then tested for removal nitrate from aqueous solution. effect various parameters process, such initial...

Urban storm runoff is one of the significant sources surface and groundwater pollution in metropolitan areas. The purpose this research to evaluate performance porous concrete containing iron slag with sand filter control urban storm-runoff pollution. Treatments presence absence a were studied compared. Parameters chemical oxygen demand (COD), turbidity, concentration lead, electrical conductivity (EC), total suspended solids (TSS), pH treatment media influent effluent measured. results show...

In this paper, the application of a stable immobilized cetyltrimethylammonium bromide (cationic surfactant) and laundry detergent (anionic on surface biological origin support (ostrich bone waste) was reported as novel bio-adsorbents for removal Pb(II) Hg(II) ions from aqueous solution. The synthesized bio-materials were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, Brunnauer–Emmett–Teller, SEM-EDX, thermal gravimetric, point zero charge. efficiency...

The main aim of this study was to develop an index determine groundwater drought. Then, as a case study, for the sustainable use groundwater, optimum cropping pattern determined in full compliance with drought conditions plain. newly presented index, known recharge (GRDI), based on values different zones GRDI within region calculated using data covering 30 years (1980–2010). Based found occur frequently these regions since 1981. According obtained results, developed compared other indices,...

In this research, ostrich bone ash (OBA) was modified with nanoscale zerovalent iron (nZVI) particles and applied as a novel composite adsorbent (OBA/nZVI) for dynamic adsorption/reduction of Hg(II) Pb(II) ions in fixed-bed column system. Entrapment nZVI OBA beads barricades the from oxidation aggregation. The behavior metal removal by OBA/nZVI assessed function inlet flow rates, bed height, initial pollutants concentration pH. synthesized characterized several physicochemical techniques....

To evaluate the performance of Adaptive Neural-Based Fuzzy Inference System (ANFIS) model in estimating efficiency Pb (II) ions removal from aqueous solution by ostrich bone ash, a batch experiment was conducted. Five operational parameters including adsorbent dosage (Cs), initial concentration (Co), pH, temperature (T) and contact time (t) were taken as input data adsorption (AE) ash output. Based on 31 different structures, 5 ANFIS models tested against measured to assess accuracy each...