Activated Carbon and Manganese Coated Activated Carbon Precursor to Dead Biomass in the Remediation of Arsenic Contaminated Water

Heavy metal ion contamination in water poses a significant risk to human health as well as to the environment. Millions of tons of agricultural wastes are produced from oil palm plantations which are challenging to manage. In this study, we converted palm kernel shells (PKS) from a palm oil plantation into activated carbon (AC) having a surface area of 1099 m2/g using phosphoric acid as an activator. The prepared material was characterized using BET, XRD, Raman, FESEM and FTIR analyses. The AC was applied for the treatment of heavy-metal-contaminated water, and different parameters; the pH, adsorbent dosage, contact time and metal ion concentrations were varied to determine the optimal conditions for the metal ion adsorption. Different kinetic models; the zeroth, first-order and second-order, and Freundlich and Langmuir isotherm models were used to determine the mechanism of metal ion adsorption by the AC. Under the optimized conditions, Cr6+ and Pb2+ were removed completely, while Zn2+ and Cd2+ were more than 80% removed. This is a greener approach in which an agricultural waste, PKS is converted into a useful product, activated carbon and subsequently applied for the treatment of heavy metal-contaminated water.

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Evaluation of techniques for the remediation of antibiotic-contaminated water using activated carbon

Molecular Systems Design & Engineering ◽

10.1039/c9me00167k ◽

2020 ◽

Vol 5 (4) ◽

pp. 743-756 ◽

Cited By ~ 2

Author(s):

Kiran P. Shejale ◽

Dharmveer Yadav ◽

Harshala Patil ◽

Sumit Saxena ◽

Shobha Shukla

Keyword(s):

Activated Carbon ◽

Environmental Pollutants ◽

Terrestrial Ecosystems ◽

Contaminated Water ◽

Antibiotic Resistant ◽

Important Group ◽

Low Concentrations ◽

Global Concern

Antibiotics have emerged as an important group of environmental pollutants and attracted global concern due to their persistent influence on aquatic and terrestrial ecosystems even at low concentrations and evolution of antibiotic-resistant superbug.

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Study on Preparation of Activated Carbon Precursor from Medium Temperature Coal Tar Pitch

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.726-731.712 ◽

2013 ◽

Vol 726-731 ◽

pp. 712-715 ◽

Cited By ~ 1

Author(s):

Shu Guang Ouyang ◽

Rong Guang Xu

Keyword(s):

Activated Carbon ◽

High Performance ◽

Coal Tar ◽

Absorption Capacity ◽

Carbonization Temperature ◽

Coal Tar Pitch ◽

Carbon Precursor ◽

Optimal Method ◽

Medium Temperature ◽

Adsorption Capacities

In order to explore the optimal method to prepare high performance activated carbon precursors from medium temperature coal tar pitch, orthogonal tests are adopted to study the effects of oxygen-blowing time in the pretreatment process as well as carbonization temperature and carbonization time in activation and carbonization processes on the adsorption capacities of activated carbon. Moreover, the effects of additives (coke powder and anionic surfactant) on the adsorption capacities of activated carbon are examined. The results show that the factors affecting the adsorption capacities of pitch-based activated carbon, in order of importance, are carbonization temperature, oxygen-blowing time, carbonization time and additives. The optimal conditions for preparation of activated carbon precursor from medium temperature pitch are: 4h for oxygen-blowing time, 400°C for carbonization temperature, 60 minutes for carbonization time and no additives. The iodine absorption capacity of the prepared activated carbon precursor which is activated for 100 min at 800°C is 1739mg/g.

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Polymer supported carbon for safe and effective remediation of PFOA and PFOS-contaminated water

10.26434/chemrxiv.7685654 ◽

2019 ◽

Author(s):

Nicholas Lundquist ◽

Martin Sweetman ◽

Kymberley Scroggie ◽

Max Worthington ◽

Louisa Esdaile ◽

...

Keyword(s):

Activated Carbon ◽

Self Assembly ◽

Fine Particles ◽

Polymer Support ◽

Contaminated Water ◽

Water Safety ◽

Continuous Processes ◽

Field Samples ◽

Perfluorinated Alkyl Substances ◽

Polymer Supported

<div> <div> <div> <p>Powdered activated carbon (PAC) is an economical sorbent for removing micropollutants from water, but it generates hazardous dust that is flammable and a respiration hazard. Additionally, the fine particles of PAC can cake and block filters and membranes, complicating its use in continuous processes. In this study, we present a sulfur polymer support for PAC that overcomes these problems. The blend of the sulfur polymer and PAC generates low dust and it does not block filters. The utility of the sorbent is demonstrated in the remediation of water contaminated with perfluorinated alkyl substances (PFASs)—persistent micropollutants that currently threaten water safety worldwide. Fundamental discoveries of PFAS self-assembly are reported, as well as testing on field samples. </p> </div> </div> </div>

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