Removal of Pb(II), Fe(II) and Zn(II) using activated carbon produced from foxtail palm fruit chemically activated by KOH and H3PO4.

The increasing rate of urbanization and continuous developments are the main factor which led to heavy metals contamination into the environment especially in the water bodies. However, the contamination of heavy metal can be treated using adsorption process using activated carbon. Thus, this study was based on using powdered activated carbon, which prepared from foxtail palm fruit and chemically activated using potassium hydroxide and phosphoric acid. The main parameters such as effect of chemical activating agent, effect of initial concentration of heavy metal and effect of sorbent dosage that influenced the sorption process were studied. From the result, activated carbon that was chemically activated by phosphoric acid shown the best removal compared to activated carbon that was chemically activated by potassium hydroxide. The percentage removal of Pb(II), Fe(II) and Zn(II) were 95.8%, 99.9% and 22.8% respectively using 0.5 g of activate carbon. The result indicates that the adsorption process using activated carbon that produced from plant can be applied for heavy metal removal from aqueous solution.

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Adsorption of Hexavalent Chromium and Divalent Lead Ions on the Nitrogen-Enriched Chitosan-Based Activated Carbon

Nanomaterials ◽

10.3390/nano11081907 ◽

2021 ◽

Vol 11 (8) ◽

pp. 1907

Author(s):

Fatma Hussain Emamy ◽

Ali Bumajdad ◽

Jerzy P. Lukaszewicz

Keyword(s):

Heavy Metal ◽

Activated Carbon ◽

Metal Ions ◽

Metal Removal ◽

High Surface ◽

Heavy Metal Removal ◽

High Surface Area ◽

Kinetics Of Adsorption ◽

Removal Of Heavy Metals ◽

Pseudo Second Order

Optimizing the physicochemical properties of the chitosan-based activated carbon (Ch-ACs) can greatly enhance its performance toward heavy metal removal from contaminated water. Herein, Ch was converted into a high surface area (1556 m2/g) and porous (0.69 cm3/g) ACs with large content of nitrogen (~16 wt%) using K2CO3 activator and urea as nitrogen-enrichment agents. The prepared Ch-ACs were tested for the removal of Cr(VI) and Pb(II) at different pH, initial metal ions concentration, time, activated carbon dosage, and temperature. For Cr(VI), the best removal was at pH = 2, while for Pb(II) the best pH for its removal was in the range of 4–6. At 25 °C, the Temkin model gives the best fit for the adsorption of Cr(VI), while the Langmuir model was found to be better for Pb(II) ions. The kinetics of adsorption of both heavy metal ions were found to be well-fitted by a pseudo-second-order model. The findings show that the efficiency and the green properties (availability, recyclability, and cost effectiveness) of the developed adsorbent made it a good candidate for wastewaters treatment. As preliminary work, the prepared sorbent was also tested regarding the removal of heavy metals and other contaminations from real wastewater and the obtained results were found to be promising.

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Heavy metal removal from wastewater using various adsorbents: a review

Journal of Water Reuse and Desalination ◽

10.2166/wrd.2016.104 ◽

2016 ◽

Vol 7 (4) ◽

pp. 387-419 ◽

Cited By ~ 98

Author(s):

Renu ◽

Madhu Agarwal ◽

K. Singh

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Aquatic Ecosystems ◽

Adsorption Process ◽

Metal Removal ◽

Low Cost ◽

Heavy Metal Removal ◽

Review Article ◽

Removal Capacity ◽

Removal Of Heavy Metals

Heavy metals are discharged into water from various industries. They can be toxic or carcinogenic in nature and can cause severe problems for humans and aquatic ecosystems. Thus, the removal of heavy metals from wastewater is a serious problem. The adsorption process is widely used for the removal of heavy metals from wastewater because of its low cost, availability and eco-friendly nature. Both commercial adsorbents and bioadsorbents are used for the removal of heavy metals from wastewater, with high removal capacity. This review article aims to compile scattered information on the different adsorbents that are used for heavy metal removal and to provide information on the commercially available and natural bioadsorbents used for removal of chromium, cadmium and copper, in particular.

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Application of Freundlich and Temkin Isotherm to Study the Removal of Pb(II) Via Adsorption on Activated Carbon Equipped Polysulfone Membrane

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.18.16683 ◽

2018 ◽

Vol 7 (3.18) ◽

pp. 91 ◽

Cited By ~ 3

Author(s):

Khairul Anwar Mohamad Said ◽

Nor Zakirah Ismail ◽

Ramizah Liyana Jama'in ◽

Nurul Ain Mohamed Alipah ◽

Norsuzailina Mohamed Sutan ◽

...

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Adsorption Process ◽

Metal Removal ◽

Heavy Metal Removal ◽

Void Formation ◽

Freundlich Isotherm ◽

Polysulfone Membrane ◽

Temkin Isotherm ◽

The Matrix

The aim of this study was to investigate the application of membrane equipped activated carbon for heavy metal removal. An adsorption capacity of the activated carbon inside membrane matrix was performed against environmentally problematic ions specifically Pb2+, in aqueous solution. The adsorption process was examined by Temkin and Freundlich isotherm. From the SEM observation, membrane exhibit sponge-like structure with dense micro-void formation across the matrix. This phenomenon was usually observed with membrane mixed with polyethyleneimine. For the adsorption studies, it is shown that Freundlich isotherm show better fit based on R2 value of 0.9893 with Temkin isotherm fitted with R2 of 0.9009. Through the fitted model, the adsorption occur on the surface of activated carbon are possibly multilayer type adsorption based on theory by Freundlich isotherm and fall under non-ideal reversible adsorption.

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