Removal of sulfide ions from aqueous solutions using carbon- and silicon-containing sorbents

Removal of dissolved sulfides from synthetic and industrial solutions by activated carbon derived from Tunisian olive stone

“…It can be deduced that the adsorption of sulfides by the three ACs is described by the pseudo‐second order kinetic model. Similar results have been noted in previous works where the pseudo‐second order model was found suitable to describe the kinetic of sulfides removal by many adsorbents with different characterizations and from diverse precursors 13,14,16 …”

“…It is worthy to note the absence of bands corresponding to OH, C═O, and COC groups. The carbonaceous adsorbent is an aromatic polymer of carbon atoms 10,14 …”

“…This solid waste was valorized for the preparation of AC, which has been used in many applications, namely adsorption of heavy metals from aqueous solutions 9,10 and pollutant (NO 2 ) from gas effluent 11 . The removal of dissolved sulfides by adsorption was the object of many works by solutions from different origins: synthetic solutions produced in the laboratory (from sodium sulfide 5 ) and industrial solutions rejected from refinery 12 or tanneries wastewater, 13 with concentrations from 140 μg/l 14 to 1000 mg/l 12 . Various adsorbents have been used for the uptake of sulfides, such as granular ferric hydroxide, 15 porous graphitic carbon/manganese dioxyde, 16 bio‐sorbents, 13 and AC 5,12 .…”

Use of silicate by-products in water treatment processes and development of eco-friendly self-polishing antifouling coatings

“…It has been established (Arefieva et al 2015;Sheveleva et al 2009;Zemnukhova et al 2017;Yarusova et al 2016Yarusova et al , 2019aGordienko et al 2012) that siliconcontaining compounds extracted from industrial and agricultural plant waste (rice husk, borogypsum) have good adsorption and other properties, which makes it possible to use them as sorbents for removing organic compounds (Arefieva et al 2015;Zemnukhova et al 2017;Yarusova et al 2019a;Abukhadra & Shaban 2019), heavy metals and radionuclides from aqueous media (Sheveleva et al 2009;Gordienko et al 2012;Sharaf & Hassan 2014;Yarusova et al 2016Yarusova et al , 2019bYarusova et al , 2019c, obtaining modifying additives in concretes and other building materials (Yarusova et al 2018;Nana et al 2021), as well as to create new composite materials (Garcia-Mejia et al 2020;Sethuramalingam et al 2021). This positive experience with the use of local waste to solve environmental and other industrial problems, as well as the accumulation of multitonnage waste requiring disposal, has promoted further research in this area.…”