Removal of some heavy metals ions from wastewater by copolymer of iron and aluminum impregnated with active silica derived from rice husk ash

Review on the physicochemical treatments of rice husk for production of advanced materials

“…Therefore, alternative low-cost, nonconventional adsorbents such as bagasse fly ash (BFA), rice husk ash, peat, lignite, bagasse pith, wood, saw dust, etc. have been proposed for the treatment of effluents [20,21]. Adsorption properties of rice husk have been studied because of its low price and richness in silica.…”

Study on the effectiveness of thermally treated rice husks for petroleum adsorption

“…The adsorbents on the base of rice husk are widely used in various processes including the purification and recovery of valuable substances from liquid and gaseous media. For example, treated and untreated rice husks were studied as adsorbent materials for the removal of 2,4-dichlorophenol [19], formaldehyde and acetaldehyde [20], free fatty acids [21,22], phenol [23], pyridine [24], metal ions [25], ammonium ions [26], methylene blue [27] and humic acids [28] in aqueous systems. Thus, rice husks may be also a suitable source for obtaining valuable adsorbent materials with high specific surface area and large pore volume by thermal treatment.…”

Humic acids removal from water by aminopropyl functionalized rice husk ash

“…From this, an estimated 4-7 million metric tonnes of rice husk are available. Rice husk biomass can be exploited for many uses, including: energy production [11], production of activated carbon [12,13], and as a silica source for the synthesis of sorbents [14][15][16].…”