Reduction of Crystal Violet Dye from Water by Pomegranate Peel–Derived Efficient Biochar: Influencing Factors and Adsorption Behaviour

Characterization of activated carbon produced from the green algae Spirogyra used as a cost-effective adsorbent for enhanced removal of copper(ii): application in industrial wastewater treatment

“…33 The peak at 2360 cm −1 could be related to carbon dioxide (CO 2 ) in the air, 42–44 or carbon–oxygen groups, CO. 2 Moreover, this last peak also appeared at 1800 cm −1 due to the functional group in carboxylic acids, anhydrides, ketones and esters. 29 Some peaks (small and sharp) were observed for SP between 1600–1000 cm −1 , assigned to the CC aromatic ring stretching vibration (1560 cm −1 ), 9,45 the ionic carboxylic groups –COO − (1420 cm −1 ), 14,33,46 C–O stretching (1260–1050 cm −1 ) 9 and C–O–C groups. 6 In the SPAC spectrum, two peaks at 1430 and 1110 cm −1 were attributed to (–COO − ) and C–N aliphatic amines, 37 respectively.…”

Production of biochar from Melia azedarach seeds for the crystal violet dye removal from water: combining of hydrothermal carbonization and pyrolysis

“…Figure 4 depicts the SEM micrograph of B-700 and HB-700, revealing a heterogeneous structure with tunnel-shaped pores in the analyzed samples. Both samples exhibit notable porosity, which arises from the pyrolysis-induced degradation of lignin and cellulose within the biochar structure [ 21 ]. This development holds the potential to render the subjected adsorbents highly effective for the removal of CV molecules from water media.…”

Persulfate Activation Using Biochar from Pomegranate Peel for the Degradation of Antihypertensive Losartan in Water: The Effects of Pyrolysis Temperature, Operational Parameters, and a Continuous Flow Reactor

“…A wellknown agricultural waste is pomegranate peels, the annual global amount of which is approximately 1.62 million tons [42]; thus, it is considered a potential source to produce biochar. So far, pomegranate peel has been studied as a potential source to produce biochar with a high heating value (23.5 MJ/kg) [43], and to be used as an adsorbent material for crystal violet dye [44]. Only recently, Chen et al [26] used biochar from pomegranate husk that was pyrolyzed at 500 • C, modified with KOH, ZnCl 2 , and KHCO 3 , and continuously pyrolyzed again at 800 • C for peroxymonosulfate (PMS) activation for sulfamethoxazole (SMX) degradation.…”