Sorption of lead (II) and strontium (II) ions from aqueous solutions onto non-living Chlorella Vulgaris Alga/ Date pit activated carbon composite

In this study, a magnetite/chitosan/activated carbon (MCHAC) composite is proposed as an efficient adsorbent for the removal of atrazine from aqueous solutions.

Download Full-text

Single and binary component adsorption of endocrine disrupting chemicals from aqueous solutions using calcium alginate/apricot stone-activated carbon composite bead

10.5004/dwt.2020.25911 ◽

2020 ◽

Vol 197 ◽

pp. 170-181

Author(s):

Nassima Djebri ◽

Kamel Noufel ◽

Nadia Boukhalfa ◽

Dounia Sid ◽

Mokhtar Boutahala

Keyword(s):

Activated Carbon ◽

Aqueous Solutions ◽

Calcium Alginate ◽

Endocrine Disrupting Chemicals ◽

Carbon Composite ◽

Composite Bead ◽

Binary Component ◽

Endocrine Disrupting ◽

Component Adsorption

Download Full-text

Ultrasound-Assisted Preparation of Chitosan/Nano-Activated Carbon Composite Beads Aminated with (3-Aminopropyl)Triethoxysilane for Adsorption of Acetaminophen from Aqueous Solutions

Polymers ◽

10.3390/polym11101701 ◽

2019 ◽

Vol 11 (10) ◽

pp. 1701 ◽

Cited By ~ 4

Author(s):

Vakili ◽

Amouzgar ◽

Cagnetta ◽

Wang ◽

Guo ◽

...

Keyword(s):

Activated Carbon ◽

Aqueous Solutions ◽

Carbon Composite ◽

Multilayer Adsorption ◽

Freundlich Model ◽

Performance Loss ◽

Composite Beads ◽

Bet Analysis ◽

Naoh Solution ◽

Pseudo Second Order

A composite chitosan/nano-activated carbon (CS-NAC) aminated by (3-aminopropyl)triethoxysilane (APTES) was prepared in the form of beads and applied for the removal of acetaminophen from aqueous solutions. NAC and APTES concentrations were optimized to obtain a suitable adsorbent structure for enhanced removal of the pharmaceutical. The aminated adsorbent (CS-NAC-APTES beads) prepared with 40% w/w NAC and 2% v/v APTES showed higher adsorption capacity (407.83 mg/g) than CS-NAC beads (278.4 mg/g). Brunauer–Emmett–Teller (BET) analysis demonstrated that the surface area of the CS-NAC-APTES beads was larger than that of CS-NAC beads (1.16 times). The adsorption process was well fitted by the Freundlich model (R2 > 0.95), suggesting a multilayer adsorption. The kinetic study also substantiated that the pseudo-second-order model (R2 > 0.98) was in better agreement with the experimental data. Finally, it was proved that the prepared beads can be recycled (by washing with NaOH solution) at least 5 times before detectable performance loss.

Download Full-text

Adsorption of Pb2+ ions from aqueous solutions by gelatin/activated carbon composite bead form

Adsorption Science & Technology ◽

10.1177/0263617417693006 ◽

2017 ◽

Vol 36 (1-2) ◽

pp. 355-371 ◽

Cited By ~ 6

Author(s):

Fareeda Hayeeye ◽

Qiming J Yu ◽

Memoon Sattar ◽

Watchanida Chinpa ◽

Orawan Sirichote

Keyword(s):

Activated Carbon ◽

Aqueous Solutions ◽

Adsorption Capacity ◽

Ph Value ◽

Carbon Composite ◽

Batch Adsorption ◽

Maximum Adsorption Capacity ◽

Solution Ph ◽

Experimental Conditions ◽

Composite Bead

Gelatin and activated carbon materials have been combined together to obtain a gelatin/activated carbon composite bead form which is ecofriendly, nontoxic, biocompatible, and inexpensive material. In this paper, gelatin/activated carbon adsorption for Pb2+ ions from aqueous solutions was studied experimentally under various conditions. The experimental conditions such as contact time, solution pH, and gelatin/activated carbon dosage were examined and evaluated by using batch adsorption experiments. The maximum adsorption capacity of gelatin/activated carbon for Pb2+ ions was obtained to be 370.37 mg g−1. This maximum capacity was comparable with that of commercial ion exchange resins and it was much higher than those of natural zeolites. The uptake process for Pb2+ ions was found to be relatively fast with 92.15% of the adsorption completed in about 5 min in batch conditions. The adsorption capacity was also strongly solution pH dependent. Adsorption was observed at pH value as low as 2.0 and maximum adsorption was achieved at a pH of approximately 5. The results indicated that the gelatin/activated carbon was effective to be used as an adsorbent for Pb2+ ions removal in wastewater treatment.

Download Full-text