Sustainable adsorbents formed from by-product of acid activation of vermiculite and leached-vermiculite-LDH hybrids for removal of industrial dyes and metal cations

Abstract

Hydrotalcite-like layered double hydroxide (LDH) materials were synthesized from liquid waste by-product produced during acid activation of vermiculite (raw (W) and expanded (Ve)), and by combining the waste with the activated mineral, novel hybrid vermiculitehydrotalcite-like materials were obtained in one-pot synthesis. Batch system adsorption experiments were performed on fresh and calcined (at 450 °C) materials using two anionic dyes (Congo Red-CR, and Reactive Red 184-R), a cationic dye (Astrazon Red-AR), and Cu2+. Calcination significantly increased the materials' adsorption capacities for all the pollutants. The highest adsorption capacities

Structural Stability of Ni/Al Layered Double Hydroxide Supported on Graphite and Biochar Toward Adorption of Congo Red

“…, where M 2+ as divalent and M 3+ trivalent metal ions and A / − as interlayer with n valence (Daud et al, 2019;Stawiński et al, 2018). Due to their unique properties such as large surface areas, high porosity, diverse compositions, excellent anion-exchange capabilities, and high thermal stability, LDHs have been widely used in catalysis, drug delivery and adsorption elds (Wang et al, 2018).…”

“…In order to optimize materials' performances, eforts have been made to vary the composition as well as the particle morphology of the LDHs (Wijitwongwan et al, 2019). LDH could be synthesized with diverse methods as instance hydrothermal, hydrolysis, sonochemical solgel and co-precipitation (Bernardo and Ribeiro, 2019;Stawiński et al, 2018). The co-precipitation method is the most common method for synthesize LDHs (Chang et al, 2005).…”

Competitive Removal of Cationic Dye Using NiAl-LDH Modified with Hydrochar

“…Among the environmental problems that often occur, the handling of dye wastewater is still one of the most discussed and is of concern to the world (Mrózek et al, 2019;Stawiński et al, 2018). Dyes are pollutants produced in various industries and often in heavy metals in wastewater (Stawiński et al, 2018). Many dyes have wide applications in various textile industries (Daud et al, 2019), cosmetics, plastics , paints, and paper (Saghir et al, 2020).…”

“…Many dyes have wide applications in various textile industries (Daud et al, 2019), cosmetics, plastics , paints, and paper (Saghir et al, 2020). These pollutants have harmful effects on living organisms and are resistant to conventional treatments because of their carcinogenic and mutagenic properties (Daud et al, 2019;Stawiński et al, 2018). Several technologies for dye removal have been developed including membrane treatment, coagulation or flocculation (Daud et al, 2019), adsorption (Palapa et al, 2020), ion exchange (Mikif et al, 2018), manipulation and photodegradation (Saghir et al, 2020).…”

Adsorption of Acid Orange Ⅱ with Two Step Modified Sepiolite: Optimization, Adsorption Performance, Kinetics, Thermodynamics and Regeneration

“…Moreover, some readily available and cheap materials like desert sand were also employed as adsorbents [10].The adsorption method has the advantage of operation simplicity, treatment effectiveness and operability [11]. It is the most effective method and also the most widely used method for treating wastewater contaminated with substances such as dyes [12][13][14], heavy metal cations [15], or pharmaceuticals [16].…”