Abstract BACKGROUND Alkaline amorphization of fly ash (FA) and crystallization the potassium W zeolite from resultant amorphous materials was carried out at different scales by a straightforward hydrothermal method. The experimental factors levels were evaluated during FA study variation metallic hydroxide, concentration, temperature time for reaction. RESULTS alkaline activation quantified set optimal conditions to obtain easy be recrystallized into zeolite. process laboratory scale...

This paper presents a novel family of jarosites with the molecular formula MFe3(SO4)2(OH)6·xH2O; M = Na, K, NH4 that have high efficiency in adsorption As(V) and Pb(II) dissolved water. The been prepared by conventional heating at temperatures close to 95 °C for 3 h. synthesis method was improved optimized reduce time energy consumption. allowed Na− K−jarosites yield up 97.8 wt.% 105 150 °C, respectively, Na−, K−, NH4−jarosites were synthesized 5 min via microwave-assisted method, which...

Inorganic arsenic in drinking water from groundwater sources is one of the potential causes arsenic-contaminated environments, and it highly toxic to human health even at low concentrations. The purpose this study was develop a magnetic adsorbent capable removing water. Fe3O4-monolithic resorcinol-formaldehyde carbon xerogels are type porous material that forms when resorcinol formaldehyde (RF) react form polymer network, which then cross-linked with magnetite. Sonication-assisted direct...

Arsenic contamination of groundwater is still a global problem due to the toxicity at low dose on human health confirmed by epidemiological studies. Magnetic xerogel monoliths (MXs) were synthesized sol-gel polymerization using resorcinol, formaldehyde, alkaline catalyst and magnetite. The varying molar ratios magnetite resorcinol (M/R) in gel evaluated for As(V) removal from groundwater. surface chemistry, structure morphology MXs related arsenic adsorption characterized X-ray diffraction,...

In the "Laguna" region of Coahuila state, Mexico like other places in world, groundwater needs to be treated meet quality required for human consumption. The study had probed that a Mexican fly ash can used as raw material obtain effective low cost adsorbents drinking water treatment, well evaluated effects pH, ion coexistence, dose, arsenic (As) concentration and temperature on As(V) uptake by using P W modified zeolites (PMOD WMOD) obtained from ash. adsorption capacity WMOD zeolite was...

Water scarcity, the degradation of freshwater resources, and wastewater pollution are reaching crisis levels, especially in arid regions world.The reuse was investigated by using intermittent media infiltration (IMI) to evaluate fecal coliform (FC) removal efficiency.Twelve IMI columns were packed with soil natural filtering materials (sand, zeolite, vermicompost charcoal) at percentages 25, 50 75.The municipal treated for FC analysis four weeks.The chemistry, physics, morphology filter as...

Abstract Magnetic xerogels monoliths (MCs) were simultaneously prepared and formed by the cross-linking polymerization of resorcinol formaldehyde using alkaline catalyst magnetite. The varying molar ratio (R/C) was studied characterized isoelectric point (IEP), zero charge (pHpzc), scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM-EDX), diffraction (XRD), N2 adsorption Fourier transform infrared (FTIR). result XRD EDX confirmed presence magnetite into gel at 1.19% with...

Magnetic biochar derived from various residual agricultural wastes have been widely studied due to their abundance, low cost, and minimal environmental impact. Pecan nutshell ( Carya illinoinensis ) residuals were incorporated with γ-Fe 2 O 3 , transforming them into magnetic adsorbents. The effect of particle size (granular: 0.38-0.7 mm; powder: 0.15-0.38 mm) pyrolysis temperature (500 °C 650 °C) investigated for influence on adsorption capacity arsenic fluoride in aqueous solutions. Our...

Magnetic xerogels (MCs) were prepared by the cross-linking polymerization of resorcinol and formaldehyde (RF) using alkaline catalyst magnetite (Fe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> ). The indirect sonication was applied to distribute particles in RF aqueous solution obtain magnetic adsorbent that could be used as an easier recovery for water treatment. As a result...

Water scarcity, degradation of freshwater resources and wastewater pollution are become the serious crisis especially in arid area. The reuse treatment system have been investigated developed for applying urban area by using intermittent media infiltration (IMI). Soil was principle filtering IMIs were composited with mixed natural (sand, zeolite charcoal) different composition. All samples analyzed studying physical chemical properties, mineralogical composition X-ray diffraction (XRD)...

The reclamation of domestic wastewater for irrigation is one alternative approach to solve the water scarcity crisis, but it essential control microbiological quality used irrigation. removal thermotolerant coliforms, also known as faecal coliforms (FC), from treated by intermittent media infiltration (IMI) in column was studied. columns were filled with natural filter (soil, soil/charcoal and zinc-modified zeolite, Zeo-Zn), wastewater, IMI-treated disinfected compared. numbers residual FC...

The reuse of a wastewater treatment system was investigated using intermittent media infiltration (IMI) to evaluate the fecal coliform (FC) removal efficiency with natural zeolite containing clinoptilolite from state San Luis Potosí, Mexico and its zinc-modified form (Zeo-Zn).The municipal wastewater, which Saltillo, Coahuila, Mexico, treated for FC analysis four months.The physicochemical properties were analyzed, their behavior as filter an IMI studied X-ray diffraction (XRD), scanning...

Abstract This research focuses on generating magnetic adsorbents with less expensive precursors, a simple and cheap method of subcritical drying for xerogel, easily recovered from the aqueous medium properties reducing impact pollutants in environment. The application response surface methodology (RSM) optimization As(III) As(V) adsorption process carbon xerogel nanocomposites (XMCs) solution was proposed this study under scheme central composite design 2 3 face. XMCs were synthesized...

Magnetic carbon xerogels were synthesized via direct sonication to load magnetite nanoparticles in sol–gel polycondensation onto resorcinol-formaldehyde gels. The resulting organic gels carbonized and subjected surface modification using H2O2 characterized scanning electron microscopy energy-dispersive X-ray spectroscopy. desorption capacity was optimized response methodology, with the adsorbent dose identified as most significant quantitative factor. kinetic adsorption well described...

Magnetic carbon xerogel composites with Fe3O4 nanoparticles (MNPs) prepared via co-precipitation can effectively remove arsenic (As(V) and As(III)) fluoride ions from groundwater. The optimum conditions for the synthesis of these materials were studied, including molar ratios MNPs catalyst. Carbonization post-synthesis treatment H2O2-induced surface modification applied. SEM Fe analysis revealed presence in materials. This study provides a promising new method removal groundwater,...

The use of unmanned aerial vehicles (UAVs) in precision agriculture has proven to be a useful tool for crop monitoring. this technology irrigation water management represents significant improvement opportunity compared the tools commonly used. This study aimed estimate content corn plants using images captured by drone, evaluating effect that flying height on accuracy estimation indicator. For purpose, potential (WP) was measured plant leaves, which allows us infer presence stress, and...