Sustainable activated carbons prepared from a sucrose-derived hydrochar: remarkable adsorbents for pharmaceutical compounds

RSC Advances ◽  
2015 ◽  
Vol 5 (25) ◽  
pp. 19696-19707 ◽  
Author(s):  
Ana S. Mestre ◽  
Emil Tyszko ◽  
Marta A. Andrade ◽  
Margarida Galhetas ◽  
Cristina Freire ◽  
...  
Keyword(s):  
Activated Carbons ◽  
Pharmaceutical Compounds ◽  
Water Reclamation ◽  
High Adsorption ◽  
Adsorption Capacities

Biomass as key to water reclamation: sugar-derived carbons allow high adsorption capacities for the removal of pharmaceuticals from water.

scholarly journals SILOXANES REMOVAL FROM BIOGAS USING ACTIVATED CARBON

2017 ◽  
Vol 57 (2) ◽  
pp. 131 ◽  
Author(s):  
Alice Vagenknechtová ◽  
Karel Ciahotný ◽  
Veronika Vrbová
Keyword(s):  
Activated Carbon ◽  
Activated Carbons ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Sludge ◽  
High Adsorption ◽  
Technical Problems ◽  
Operational Costs ◽  
Adsorption Capacities ◽  
Purification Equipment

SiO<sub>2</sub> deposits which cause technical problems on combustion equipment are built by combustion of biogas containing siloxanes. Therefore, in these cases, the siloxanes must be removed from the biogas. For siloxane removal from biogas, its adsorption on activated carbon is often used. After saturation, the saturated adsorbent must be replaced. The adsorbent cost constitutes the main part of the operational costs of the purification equipment. Therefore it is necessary to find an adsorbent having high adsorption capacity for siloxane at a possible low price. Using laboratory apparatus and biogas produced from waste-water treatment sludge at the wastewater treatment plant Prague Bubenec various activated carbons were tested for siloxane removal and their adsorption capacities for siloxanes were estimated, and the adsorbent cost relative to 1 kg of siloxanes removed from biogas were calculated. The lowest price for the removal of 1 kg of siloxanes was determined by Chezacarb, Sil Extra 40 AP and 4–60 adsorbents. Another important information obtained from the test is that the weakly adsorbed siloxane (OMCTS) is displaced by the larger molecule of DMCPCS during adsorption.

scholarly journals Application of Sludge-Based Activated Carbons for the Effective Adsorption of Neonicotinoid Pesticides

2021 ◽  
Vol 11 (7) ◽  
pp. 3087
Author(s):  
Eva Sanz-Santos ◽  
Silvia Álvarez-Torrellas ◽  
Lucía Ceballos ◽  
Marcos Larriba ◽  
V. Ismael Águeda ◽  
...  
Keyword(s):  
Adsorption Process ◽  
Wastewater Treatment Plants ◽  
Activated Carbons ◽  
Low Cost ◽  
High Adsorption ◽  
Secondary Pollution ◽  
Adsorption Capacities ◽  
Agricultural Use ◽  
Neonicotinoid Pesticides ◽  
Watch List

The amount of sludge produced in wastewater treatment plants (WWTPs) has increased over the years, and the methods used to reduce this waste, such as incineration, agricultural use, or disposal in landfills, cause problems of secondary pollution. For this reason, it is necessary to find sustainable and low-cost solutions to manage this waste. Additionally, emerging and priority pollutants are attracting attention from the scientific community as they can generate health problems due to inadequate removal in conventional WWTPs. In this work, a pharmaceutical industry sludge was used as a precursor in the synthesis of four activated carbons (ACs) using different activating agents (ZnCl2, FeCl3∙6H2O, Fe(NO3)3∙9H2O, and Fe(SO4)3∙H2O), to be used for the removal by adsorption of three neonicotinoid pesticides included in latest EU Watch List (Decision 2018/840): acetamiprid (ACT), thiamethoxam (THM), and imidacloprid (IMD). The prepared ACs showed micro–mesoporous properties, obtaining relatively slow adsorption kinetics to reach equilibrium, but despite this, high values of adsorption capacity (qe) were obtained. For example, for AC-ZnCl2 (SBET = 558 m2/g), high adsorption capacities of qe = 128.9, 126.8, and 166.1 mg/g for ACT, THM, and IMD, respectively, were found. In most cases, the adsorption isotherms showed a multilayer profile, indicating an important contribution of the mesoporosity of the activated carbons in the adsorption process.

Experimental Study on Adsorption of Gasoline Vapor on Activated Carbon at High Concentration

2013 ◽  
Vol 807-809 ◽  
pp. 549-552 ◽  
Author(s):  
Chen Lu Zhao ◽  
Wei Qiu Huang ◽  
Ying Xia Wang ◽  
Li Shi
Keyword(s):  
Temperature Rise ◽  
Activated Carbons ◽  
Thermodynamic Characteristics ◽  
High Concentration ◽  
Vapor Adsorption ◽  
Gasoline Vapor ◽  
Adsorption Capacities ◽  
Bed Temperature ◽  
Relationship Of ◽  
The Relationship

Dynamic and thermodynamic characteristics of gasoline vapor adsorption at 0.3 mol/mol on different activated carbons (ACs) were investigated. The adsorption capacities of AC1 and AC3 were 0.295 g/g and 0.189 g/g at 20 oC, and 0.284 g/g and 0.165 g/g at 30 °C, respectively. Bed temperature rise was up to 50°C to 60°C in the adsorption of gasoline vapor at 0.3 mol/mol.The heat effect formula for high concentration vapor adsorption was deduced to evaluate the relationship of the adsorption capacity of the activated carbons, the mole fraction of the inlet gasoline vapor, the recovery efficiency of the gasoline vapor with the temperature rise.

scholarly journals Key Factors for Activated Carbon Adsorption of Pharmaceutical Compounds from Wastewaters: A Multivariate Modelling Approach

Water ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 166
Author(s):  
Rui M. C. Viegas ◽  
Ana S. Mestre ◽  
Elsa Mesquita ◽  
Miguel Machuqueiro ◽  
Marta A. Andrade ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Activated Carbons ◽  
Univariate Analysis ◽  
Pharmaceutical Compounds ◽  
Pls Regression ◽  
Short Term ◽  
Latent Structures ◽  
The Impact ◽  
Inorganic Matrix ◽  
Modelling Approach

Projection to Latent Structures (PLS) regression, a generalization of multiple linear regression, is used to model two datasets (40 observed data points each) of adsorption removal of three pharmaceutical compounds (PhCs), of different therapeutic classes and physical–chemical properties (carbamazepine, diclofenac, and sulfamethoxazole), from six real secondary effluents collected from wastewater treatment plants onto different powdered activated carbons (PACs). For the PLS regression, 25 descriptors were considered: 7 descriptors related to the PhCs properties, 10 descriptors related to the wastewaters properties (8 related to the organic matrix and 2 to the inorganic matrix), and 8 descriptors related to the PACs properties. This modelling approach showed good descriptive capability, showing that hydrophobic PhC-PAC interactions play the major role in the adsorption process, with the solvation energy and log Kow being the most suitable descriptors. The results also stress the importance of the competition effects of water dissolved organic matter (DOM), namely of its slightly hydrophobic compounds impacting the adsorption capacity or its charged hydrophilic compounds impacting the short-term adsorption, while the water inorganic matrix only appears to impact PAC adsorption capacity and not the short-term adsorption. For the pool of PACs tested, the results point to the BET area as a good descriptor of the PAC capacity, while the short-term adsorption kinetics appears to be better related to its supermicropore volume and density. The improvement in these PAC properties should be regarded as a way of refining their performance. The correlations obtained, involving the impact of water, PhC and PAC-related descriptors, show the existence of complex interactions that a univariate analysis is not sufficient to describe.

Two-fold 2D + 2D → 2D interweaved rhombus (4,4) grid: synthesis, structure, and dye removal properties in darkness and in daylight

2019 ◽  
Vol 48 (3) ◽  
pp. 1095-1107 ◽  
Author(s):  
Meng-Jung Tsai ◽  
Jheng-Hua Luo ◽  
Jing-Yun Wu
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Malachite Green ◽  
Dye Removal ◽  
Acid Orange 7 ◽  
High Adsorption ◽  
Acid Orange ◽  
Adsorption Capacities

A rhombus (4,4) grid showing two-fold 2D + 2D → 2D interweaved nets appeared to be a good adsorbent to selectively adsorb and separate anionic methyl orange (MO) and acid orange 7 (AO7) dyes over cationic methylene blue (MB) and malachite green (MG) from water with high adsorption capacities in both darkness and daylight.

scholarly journals Influence of Water on the Dynamic Adsorption of Chlorinated VOCs on Active Carbon: Relative Humidity of the Gas Phase versus Pre-Adsorbed Water

2006 ◽  
Vol 24 (3) ◽  
pp. 215-228 ◽  
Author(s):  
F. Cosnier ◽  
A. Celzard ◽  
G. Furdin ◽  
D. Bégin ◽  
J.F. Marêché
Keyword(s):  
Gas Phase ◽  
Activated Carbons ◽  
Adsorbed Water ◽  
Phase Versus ◽  
Chlorinated Volatile Organic Compounds ◽  
Adsorption Capacities ◽  
Volatile Organic ◽  
Influence Of Water ◽  
Hindered Diffusion ◽  
Induced Adsorption

The present work deals with the influence of water on the adsorption of two chlorinated volatile organic compounds (VOCs) on activated carbons (ACs) having very different pore textures and surface chemistry. Two kinds of moisture were considered, viz. pre-adsorbed on the AC or present as steam in the gaseous phase, at various relative humidities ranging from 30% to 75%. It is shown that the adsorption of the VOCs depends on the kind of moisture. If the latter is pre-adsorbed, water is just displaced by the VOCs (overshoot). The adsorption capacities of the AC remain unchanged and only some minor changes in the shape of the breakthrough front, corresponding to hindered diffusion, may sometimes occur. In contrast, the simultaneous adsorption of steam and VOC leads to competition between water and the chlorinated compound, with direct consequences on the adsorption kinetics and capacities of the AC. However, the decrease of the water-induced adsorption performances depends strongly on the AC and the VOC (through different VOC/AC and water/VOC interactions), and on the concentration of the VOC.

One-step synthesis of aluminum magnesium oxide nanocomposites for simultaneous removal of arsenic and lead ions in water

RSC Advances ◽  
2015 ◽  
Vol 5 (11) ◽  
pp. 8190-8193 ◽  
Author(s):  
Feng Xiao ◽  
Liping Fang ◽  
Wentao Li ◽  
Dongsheng Wang
Keyword(s):  
Magnesium Oxide ◽  
Solvothermal Method ◽  
Lead Ions ◽  
Simultaneous Removal ◽  
High Adsorption ◽  
Microwave Assisted ◽  
Adsorption Capacities ◽  
One Step ◽  
Removal Of Arsenic

Aluminum magnesium oxide nanocomposites were prepared using a one-step microwave assisted solvothermal method, and showed high adsorption capacities for the removal of both As(v) and Pb(ii) ions in water.

scholarly journals Effects of Maturity of Coconut Shells on Gold Adsorption Efficiencies of Derived Activated Carbons

2019 ◽  
Vol 19 (2) ◽  
pp. 50-54
Author(s):  
W. K. Buah ◽  
J. Darmey ◽  
F. Osei
Keyword(s):  
Activated Carbon ◽  
Activated Carbons ◽  
Cyanide Solution ◽  
Adsorption Capacities ◽  
Relative Hardness ◽  
Coconut Shells ◽  
Activation Times ◽  
Adsorption Rates

AbstractCoconut shells are used as precursors for preparation of activated carbons. The shells could vary in terms of their maturity. The influence of the maturity of the shells on gold adsorption efficiencies of derived activated carbons (ACs) from gold di-cyanide solution was investigated. The shells were pyrolysed at 900 ºC and the resulting chars were activated in steam at the same temperature for different durations. Assessment of the properties of the derived ACs revealed that; the hardness, gold adsorption capacities and rates of gold adsorption of the ACs depended on the maturity of the shells. The more matured the shells the harder the AC. The relative hardness and gold adsorption rates of the mature coconut shells activated carbons, HMand RM, respectively and those of the less mature shells, HLand RL, respectively were in the order of HM >HL and RM >RL. The relative hardness of the ACs derived from the more mature and less mature shells after 3 hrs activation were 99.3% and 94.0%, respectively and the gold adsorption rates were 5.78 mg Au/hr/gand 4.95 mg Au/hr/g, respectively. The adsorption rates and relative hardness depended on the duration of activation, where longer activation times resulted in increase in the adsorption rates and a decrease in relative hardness of the derived ACs. Keywords: Adsorption, Activated Carbon, Coconut Shells, Maturity, Relative Hardness

scholarly journals Pilot Studies and Cost Analysis of Hybrid Powdered Activated Carbon/Ceramic Microfiltration for Controlling Pharmaceutical Compounds and Organic Matter in Water Reclamation

Water ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 33 ◽  
Author(s):  
Rui M. C. Viegas ◽  
Elsa Mesquita ◽  
Margarida Campinas ◽  
Maria João Rosa
Keyword(s):  
Organic Matter ◽  
Activated Carbon ◽  
Cost Analysis ◽  
Free Water ◽  
Pharmaceutical Compounds ◽  
Powdered Activated Carbon ◽  
Production Costs ◽  
Secondary Effluent ◽  
Total Production ◽  
Water Reclamation

This paper addresses the enhanced removal of pharmaceutical compounds (PhCs), a family of contaminants of emerging concern, and effluent organic matter (EfOM) in water reclamation by powdered activated carbon/coagulation/ceramic microfiltration (PAC/cMF). Four chemically diverse PhCs are targeted: ibuprofen (IBP), carbamazepine (CBZ), sulfamethoxazole (SMX) and atenolol (ATN). Pilot assays (100 L/(m2 h), 10 mg Fe/L) run with PhC-spiked sand-filtered secondary effluent and 15 mg/L PAC dosed in-line or to a 15-min contactor. They showed no PAC-driven membrane fouling and +15 to +18% added removal with PAC contactor, reaching significant removals of CBZ and ATN (59%–60%), SMX (50%), colour (48%), A254 (35%) and dissolved organic carbon (DOC, 28%). Earlier long-term demo tests with the same pilot proved PAC/cMF to consistently produce highly clarified (monthly median < 0.1 NTU) and bacteria-free water, regardless of the severe variations in its intake. A detailed cost analysis points to total production costs of 0.21 €/m3 for 50,000 m3/day and 20 years membrane lifespan, mainly associated to equipment/membranes replacement, capital and reagents.

scholarly journals Three hierarchical porous magnesium borate microspheres: a serial preparation strategy, growth mechanism and excellent adsorption behavior for Congo red

RSC Advances ◽  
2019 ◽  
Vol 9 (35) ◽  
pp. 20009-20018 ◽  
Author(s):  
Rui-Feng Guo ◽  
Yan-Qing Ma ◽  
Zhi-Hong Liu
Keyword(s):  
Growth Mechanism ◽  
Congo Red ◽  
Selective Adsorption ◽  
High Adsorption ◽  
Magnesium Borate ◽  
Adsorption Performance ◽  
Adsorption Capacities ◽  
Hierarchical Porous ◽  
Porous Magnesium ◽  
Preparation Strategy

Three 3D hierarchical porous 7MgO·2B2O3·7H2O and 3MgO·B2O3 microspheres assembled by nanosheets have been prepared by a serial preparation strategy. They exhibited excellent selective adsorption performance for Congo red with high adsorption capacities.

Sign in / Sign up

Export Citation Format

Share Document