2021
DOI: 10.1016/j.seppur.2021.119510
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Recent advances in applications of low-cost adsorbents for the removal of heavy metals from water: A critical review

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Cited by 226 publications
(87 citation statements)
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“…Numerous methods have been applied for metal ion removal from solution such as ion exchange, coagulation/flocculation, flotation, photocatalysis, solvent extraction, electroremediation, biological sludge, adsorption, and membrane technology [5,6]. While each method offers both advantages and disadvantages [7], to date, adsorption is still a favored option as it involves a relatively lower energy consumption, easy operation, and high removal efficiency [8]. To support environmental sustainability and circular economy systems, the utilization of low cost biomass sources as adsorbent materials has increased their promising potential [4,9,10].…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…Numerous methods have been applied for metal ion removal from solution such as ion exchange, coagulation/flocculation, flotation, photocatalysis, solvent extraction, electroremediation, biological sludge, adsorption, and membrane technology [5,6]. While each method offers both advantages and disadvantages [7], to date, adsorption is still a favored option as it involves a relatively lower energy consumption, easy operation, and high removal efficiency [8]. To support environmental sustainability and circular economy systems, the utilization of low cost biomass sources as adsorbent materials has increased their promising potential [4,9,10].…”
Section: Introductionmentioning
confidence: 99%
“…The pseudo-first-order model links to the adsorption sites on the adsorbent surface occupied by pollutant particles in a number proportional to the number of unoccupied sites. The following equation may allow one to reliably measure it (Equation ( 7)) [79,80,[83][84][85]: log (q e −q t ) = log (q e ) − (K 1 /2.303) t (7) where q t , K 1 , and t are pollutants adsorbed at a specific time (mg/g), the equilibrium rate constant of pseudo first order adsorption (min −1 ), and time (min), respectively. The pseudo-second order model meanwhile can be written as follows [85,86]:…”
mentioning
confidence: 99%
“…Over the past few years, several techniques have been described for removing heavy metal ions wastewater, among them chemical precipitation [6], cementation [7], coagulationflocculation [8], adsorption [9][10][11][12], electrochemical processes [13,14], and photocatalytic methods [15].…”
Section: Introductionmentioning
confidence: 99%
“…Alternatives to AC are oxides and zeolites, polymeric adsorbents (intended for application in industrial wastewater treatments, but their high costs of Materials 2021, 14, 7587 2 of 12 production and regeneration have prevented a broader application), and, developed more recently, low-cost adsorbents derived from wastes [14]. The literature is rich of studies that investigated the adsorption potential of industrial and agricultural wastes, particularly for the removal of dyes or metals from wastewater (Table 1) [15][16][17][18][19][20][21][22][23][24]. Table 1.…”
Section: Introductionmentioning
confidence: 99%