High efficacy on diclofenac removal by activated carbon produced from potato peel waste

Abstract

In the present study, a novel porous carbon obtained by K 2 CO 3 activation of potato peel waste under optimized conditions was applied for the first time as liquid-phase adsorbent of sodium diclofenac in parallel with a commercial activated carbon. The biomass-activated carbon presented an apparent surface area of 866 m 2 g -1 and well-developed microporous structure with a large amount of ultramicropores. The obtained carbon presented leaching and ecotoxicological properties compatible with its safe application to aqueous medium. Kinetic data of laboratorymade and commercial sample were best fitted by the pseudo-second-order model. The commercial carbon presented higher uptake of diclofenac, but the biomass carbon presented the higher adsorption rate which was associated with its higher hydrophilic nature which favoured external mass transfer. Both adsorbents presented adsorption isotherms that were best fitted by Langmuir model. The biomass carbon and the commercial carbon presented adsorption monolayer capacities of 69 and 146 mg g -1 , and Langmuir constants of 0.38 and 1.02 L mg -1 , respectively. The better performance of the commercial sample was related to its slightly higher micropore volume, but the most remarkable effect was the competition of water molecules in the biomass carbon.

Aluminum Building Scrap Wire, Take-Out Food Container, Potato Peels and Bagasse as Valueless Waste Materials for Nitrate Removal from Water supplies

“…The calculated S BET values were relatively high, they were as following: 389.0 m 2 g −1 , 282.6 m 2 g −1 , 237.6 m 2 g −1 , and 217.3 m 2 g −1 for ACSB, ACPP, AlBWS and AlTFC, respectively. The surface areas of test samples exceed the values of a number of commercially available activated carbons [52] as well as other adsorbents reported by other [23,[58][59][60]. Thus, it can be reasoned that the selected adsorbents have highly porous structure and are of large specific surface areas, which are fundamental requirements for an efficient adsorbent.…”

“…Based on methodologies described by [2,[51][52][53][54] with some modification, five bottles, each one contains 50 ml of an aqueous solution of NaCl (0.01 M), and fixed sorbent loading (2.0 g L −1 in case of AlTFC and AlBWS and 3.0 g L −1 in case of ACPP and ACSB), were prepared then the starting pH of the solution (pH i ) in each bottle was adjusted by using NaOH (0.5 M) or HCl (0.5 M) solutions at pH range (2-10) in case of AlTFC and AlBWS and (2-12) in case of ACPP and ACSB. The final pH of the solutions (pH f ) was measured after 48 h of agitation with the sorbent (long enough time is allowed for diffusive mixing).…”

Kinetics and Modelling of Drug Adsorption using Activated Carbon Derived from Cocoa Cob Waste

“…Bernardo et al, [34] used an activated carbon with K 2 CO 3 from potato shell as adsorbent in liquid phase of sodium diclofenac in parallel with a commercial activated carbon. Biomass activated carbon had an apparent surface area of 866 m 2 g -1 and a well-developed microporous structure with a large quantity of ultramicropores; in addition, it has leaching and ecotoxicological properties compatible with its safe application to the aqueous environment.…”

“…Activated carbons from biomass from agro-industrial waste provide the products obtained with a high affinity for the removal of substances that wish to be removed from an effluent due to the inherent characteristics of the precursor material and the chemical agent used, This is how activated carbons have multiple applications such as the synthesis of activated carbon from cocoa shells chemically impregnated with (20% lime + 40% FeCl3 + 40% ZnCl 2 ), for the efficient removal of two anti-inflammatory agents, diclofenac sodium (DFC) and nimesulide (NM), from aqueous solutions [11,12]. Impregnation with chemical dehydrating agents has become increasingly common in the use of agroindustrial waste as precursors for the production of activated carbon, among the most commonly used chemicals are found: ZnCl2, H 3 PO4 [15,31,32], H 2 SO 4 , K 2 S, KCNS [33], HNO 3 , H 2 O 2 , KMnO 4 , (NH 4 ) 2 S 2 O 8 [34], NaOH, KOH [31,35], and K 2 CO 3 [36], These are used in order to reduce the production cost of activated carbons because they need activation temperatures lower than 600°C in contrast to the physical activation by means of water vapor and CO2, also improves their adsorption capacity, obtaining an absorbent with good mechanical and physical-chemical properties of low cost [11].…”

Optimization of Arsenic Adsorption onto Cativated Carbon Dreived from Potato Peel Using Response Surfase Methodology

“…Potato is the most produced and consumed carbohydrate worldwide. During 2013, the world production was around 376 million tons of this crop (Bernardo et al, 2016). Potato residue mainly consists of cellulose, starch and hemicelluloses .…”