background & aims of the study: dyes are one of the widespread chemicals which may have many adverse effects on life cycle. thus, this study was conducted to survey the rb19 dye removal efficacy from aqueous solution, using the sio2 nanoparticles. materials and methods: this study was an experimental-lab study. the batch adsorption system were utilized to evaluated the rb19 dye removal efficien...

Knowledge on the synthesis of cationically charged fluorescent gold nanoparticles (Au NPs) is limited because the electrostatic repulsion between cationic ligands on the surface of NP hinders the formation of small Au NPs (usually less than ca. 2 nm) during nucleation in solvents. We herein propose a novel methodology for a synthesis of water-dispersible, cationic-thiolate protected fluorescent...

Abstract L-Aspartic acid (L-Asp) functionalized magnetite nanoparticles (Fe 3 O 4 NPs) were synthesized through a facile co-precipitation method using L-Asp as capping agent. UV–Vis, FTIR, XRD, SEM, EDS, TEM, and VSM techniques used to investigate the formation, morphology, elemental composition, magnetic properties of Fe NPs. Highly crystalline spherical shaped pure phase NPs successfully amin...

Rice straw/magnetic nanocomposites (RS/Fe3O4-NCs) were prepared via co-precipitation method for removal of Pb(II) and Cu(II) from aqueous solutions. Response surface methodology (RSM) was utilized to find the optimum conditions for removal of ions. The effects of three independent variables including initial ion concentration, removal time, and adsorbent dosage were investigated on the maximum ...

Hexavalent Cr is most toxic metal and hazardous compound worldwide. It also considered to be cellular oxidizing pollutant causing damage, mutagenic hematopoietic effects living systems. Present work focused on synthesis of zero valent iron nano particles (Fe-NPs) using Bacillus subtilis SHB 13, Achromobacter xylosoxidans 204 Surfactin their application for (VI) detoxification (100 ppm) in synth...

in the present study, the capability of dried indigenous biomass of vibrio and oceanimonas, was assessed and compared for mercury biosorption from aqueous solutions. it was found that both of the biosorbents reached equilibrium after 60 min of contact although the mercury sorption capacity of vibrio was significantly more. its sorption capacity increased from 9 to 83 mg/g biomass by increasing ...

background & aims of the study: p-chloronitrobenzene is a benzoic compound that widely used in many chemical industrials. p-chloronitrobenzene may be absorbed through the skin and is suspected to causing cancer. so, developing an easy method to remove of it from the environment is necessary. equilibrium isotherms and adsorption kinetics of p-chloronitrobenzene onto modified silk waste were stud...

Background and Objectives: Lactobacillus delbrueckii ssp bulgaricus is widely used in dairy industries as a starter for yogurt production. This study was designed using response surface methodology (RSM) in 12 batch pH-controlled cultures of Lactobacillus delbrueckii sub-ssp. bulgaricus for determining the effect of temperature and pH on the biomass production of a native strain of L. bulgaricu...

This study is focused on the possible use of Ceratocystis paradoxa MSR2 native biomass for Cr(VI) biosorption. The influence of experimental parameters such as initial pH, temperature, biomass dosage, initial Cr(VI) concentration and contact time were optimized using batch systems as well as response surface methodology (RSM). Maximum Cr(VI) removal of 68.72% was achieved, at an optimal conditi...