Roberto Leyva‐Ramos

ORCID: 0000-0003-2970-6149
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About
Contact & Profiles
Research Areas
  • Adsorption and biosorption for pollutant removal
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Analytical chemistry methods development
  • Fluoride Effects and Removal
  • Advanced Photocatalysis Techniques
  • Recycling and Waste Management Techniques
  • Advanced oxidation water treatment
  • Phosphorus and nutrient management
  • Nanopore and Nanochannel Transport Studies
  • Groundwater and Isotope Geochemistry
  • Clay minerals and soil interactions
  • Mesoporous Materials and Catalysis
  • Extraction and Separation Processes
  • Heavy metals in environment
  • Covalent Organic Framework Applications
  • Water Quality Monitoring and Analysis
  • TiO2 Photocatalysis and Solar Cells
  • Gas Sensing Nanomaterials and Sensors
  • Microplastics and Plastic Pollution
  • Arsenic contamination and mitigation
  • Aerogels and thermal insulation
  • Chemical Synthesis and Characterization
  • Microfluidic and Capillary Electrophoresis Applications
  • Membrane Separation and Gas Transport
  • Supercapacitor Materials and Fabrication

Autonomous University of San Luis Potosí
2016-2025

Universidad de Guanajuato
2023

Weatherford College
2021-2023

Tecnológico de Monterrey
2023

Universidade Federal de Santa Maria
2022

Instituto de Catálisis y Petroleoquímica
2021

Institute of Catalysis and Petrochemistry
2021

Universidad Autónoma de Occidente
2016

Rede de Química e Tecnologia
2016

Institute for Scientific and Technological Research
2006-2007

In this work, the biosorption mechanism of cationic dye Methylene Blue (MB) on natural White Pine sawdust (NS) (Pinus durangensis) was investigated.Likewise, surface charge distribution NS determined, and its point zero found to be 4.3.Besides, capacity for adsorbing MB increased 1.7, 2.0 4.6 times when pH raised from 3 4.25, 7 10, respectively.This behavior attributed electrostatic attraction between negatively charged species þ .The adsorption with temperature because an endothermic...

10.1016/j.serj.2016.11.009 article EN cc-by-nc-nd Sustainable Environment Research 2016-11-24

Abstract Diffusion of phenol through a biofilm attached to activated carbon particles was investigated. The grown on in draft‐tube three‐phase fluidized‐bed bioreactor operating fed‐batch mode. It found that did not adsorb the and diffusion coefficient within varied from 13 39% its corresponding value water. reduced by increasing density. An extensive literature review substrates biofilms indicated this conclusion could be extended flat surfaces, rotating cylinders, even bioflocs.

10.1002/bit.260350309 article EN Biotechnology and Bioengineering 1990-02-05

The effects of solution pH and temperature on the adsorption fluoride onto bone char made from cattle bones were investigated in this work. It was found that maximum took place at 3 capacity decreased nearly 20 times augmenting to 12. This behavior attributed electrostatic interactions between surface ions solution. not influenced by range 15 35 °C. A comparison capacities among several adsorbents revealed 2.8 36 greater than those a commercial activated alumina (F-1) carbon (F-400). is...

10.1021/ie070023n article EN Industrial & Engineering Chemistry Research 2007-11-22

10.1016/s0304-3894(01)00333-8 article EN Journal of Hazardous Materials 2002-02-14

The adsorption isotherm of cadmium on activated carbon was measured in a batch adsorber. Effects temperature and solution pH the were investigated by determining at temperatures 10, 25, 40°C initial values from 2 to 8. Langmuir better fitted experimental data since average percent deviation lower than with Freundlich It noticed that amount Cd2+ adsorbed reduced about 3 times increasing 10 40°C. found not or precipitated out as Cd(OH)2 above 9. Maximum capacity observed 8 decreased 12...

10.2166/wst.1997.0278 article EN Water Science & Technology 1997-04-01

In this work, the single and binary adsorption of Cd(II) Pb(II) onto industrial chili seeds (CS) (Capsicum annuum) from aqueous solutions was investigated as a possible low-cost biosorbent for removal toxic heavy metals solutions. The dependence capacity CS on solution pH temperature, presence competitive metal were also studied in detail. equilibrium experiments conducted batch adsorber. Freundlich Langmuir isotherm models fitted to data latter provided better fit. Moreover, it found that...

10.1016/j.serj.2017.01.004 article EN cc-by-nc-nd Sustainable Environment Research 2017-01-25
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