Engineering Commons^™

Adsorption Of Ammonium (Nh4+) Ions Onto Various Vietnamese Biomass Residue-Derived Biochars (Wood, Rice Husk And Bamboo), Nguyen Van Hien, Eugenia Valsami-Jones, Nguyen Cong Vinh, Tong Thi Phu, Nguyen Thi Thanh Tam, Iseult Lynch

Biochar: Production, Characterization and Applications

This study evaluates adsorption of ammonium nitrogen (NH4+-N) ions onto various biochars produced from biomass residues in Vietnam as a function of their physicochemical characteristics. Three biochars, including wood biochar (WBC), rice husk biochar (RBC), and bamboo biochar (BBC), were produced under limited oxygen conditions using Top-Lid Updraft Drum technology at temperatures of 450-550oC. Physicochemical characterization (BET surface area, Cation exchange capacity (CEC), Scanning Electron Microscopy, Fourier Transform Infrared Spectroscopy) of the biochars was performed in order to link their porosity and surface functional groups with their NH4+-N capture capacities.

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Evaluating The Potential Of Biochar For Reducing Bioavailable Heavy Metal Fractions In Polluted Soil, Rosa I. Soria, Raisa Tjarinto, Stephen A. Rolfe, Steven F. Thornton

Biochar: Production, Characterization and Applications

Previous studies have proposed biochar as a natural adsorbent material with potential to be used in the remediation of polluted soils. Its application for adsorption of pollutants may reduce the bioavailability of harmful compounds in the soil media by limiting its chemical distribution and reducing the risk of uptake by organisms. Therefore, biochar has been suggested for the attenuation of heavy metals (HMs) in soil, minimizing the possibility of accumulation through the trophic chain (Figure ).

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Biochar For Pollutant Removal From Aqueous Solutions, Hamid Trimech, Anastasia Colomba, Franco Berruti, Raffaella Ocone

Biochar: Production, Characterization and Applications

Biochar can be utilised to transfer carbon dioxide from the atmosphere into soils. It can also be used for soil enhancement, due to its attitude to hold water and retain nutrients in soil by adsorbing NH4+ and PO43- ions. Due to its adsorbing capacity, biochar finds applications in removal of pollutants such as ammonia, mercury and organic compounds from waste water.

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Arsenic Removal From Drinking Water By Means Of Low Cost Biochars Derived From Miscanthus And Coconut Shell, Tommaso Marengo, Silvia Fiore, Cedric Briens, Franco Berruti

Biochar: Production, Characterization and Applications

Arsenic is a toxic metalloid highly diffused in groundwater because of natural and anthropogenic factors (mainly deriving from mining activities and pesticides). Inorganic arsenic compounds are classified by the International Agency for Research on Cancer (IARC) in Group I (proven carcinogen). Groundwater concentration of As may vary from 0.5 to 5000 μg/L taking into account more than 70 Countries around the world. The most polluted groundwater of the planet was identified in late 1990s in Bengal delta (Bangladesh and Indian region West Bengal).

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Pyrolytic Temperature Evaluation Of Macauba Biochar For Uranium Adsorption From Aqueous Solutions, Sabine Neusatz Guilhen, Nilce Ortiz, Denise Alves Fungaro, Ondrej Masek

Biochar: Production, Characterization and Applications

Macauba (Acrocomia aculeata) is a palm tree native to the tropical regions of America. In Brazil, it is prevalent in the savannah, known as “cerrado”. A valuable natural and renewable source of vegetable oil for food and cosmetic industries (nut oil) and for biodiesel (mesocarp oil), macauba has the potential to become the new “green gold” of Brazil, not only for its oil quality, but because it could solely be destined for commercial purposes, since it doesn’t compete with food market industry such as soybean and sugar cane. The dark stiff part that protects the nut, called “endocarp”, is generated …

Adsorption Processes For Co2 Capture: An Overview, Paul Webley, Ranjeet Singh, Penny Xiao

CO2 Summit III: Pathways to Carbon Capture, Utilization, and Storage Deployment

Adsorption processes for CO2 capture have gained significant attention in the last decade with hundreds of reports on new adsorbents and processes for capture and removal of carbon dioxide from a range of gas streams. To date, the only commercial examples are removal of trace carbon dioxide in gas streams such as LNG and ASU upstream molecular sieve units. There are no commercial examples of the use of adsorbents to capture carbon dioxide by adsorption processes and deliver a stream of high purity carbon dioxide for sequestration or further processing. In this study, we present the range of processing options …