Adsorption of Hexavalent Chromium From Aqueous Solutions Using Acid Activated of Natural Zeolite Collected From Ende-Flores, Indonesia

doi:10.7324/rjc.2017.1021710

Cited by 9 publications

(12 citation statements)

References 14 publications

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“…Langmuir Isotherm 15 The Langmuir model developed by equation ( 3) assumes that a monomolecular layer formed during adsorption without interaction between the adsorbed molecules. This isotherm linearized.…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…Anions corresponding to chromium; CrO4 2chromates and Cr2O7 2-dichromate are very mobile in the soil and very soluble in aquatic systems. Many natural Sorbents were used to remove Cr (VI) ions, such as clays 2 , chitosan 3 , silica 4 , zeolite 5 , activated carbon 6 Hydroxyapatite 7 Caesalpiniabonduc plants 8 , acid activated 9 , and granular activated charcoal 10 . Adsorption identified as an effective way to reduce metal contamination in surface water and industrial waste.…”

Section: Introductionmentioning

confidence: 99%

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REMOVAL OF Cr (VI) FROM AQUEOUS SOLUTION BY ADSORPTION ON THE NATURAL AND ACTIVATED FLUORAPATITE

Billah¹,

Elyamani²,

Rakhila³

et al. 2019

RJC

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The present paper to study the immobilization of chromium ions Cr(VI) in an aqueous solution by adsorption on a natural phosphate (PN) and activated (PA).The natural phosphate whose main component is fluorapatite Ca10(PO4)6F2. The study of the retention of chromium (VI) ions on natural and activated flourapatite is conditioned by several parameters namely the pH. The initial concentration of metals and the contact time. Results obtained showed that after 40 minutes of contact. The results obtained showed that after 40 minutes of contact, the elimination of chromium (VI) was maximum with a yield of 67.4% for the natural flouraptite and 75.9% for the activated phosphate. Increasing the adsorbent dose (0.5 to 1 g/l) makes it possible to improve the chromium removal efficiency with an initial concentration (10 mg/l) / l. The efficiency of removing chromium (VI) by each adsorbent decreases with the increases of the initial chromium content (2 to 10 mg / l). PH has a significant effect on the retention rate of chromium (VI). The efficiency of removing Cr (VI) is interesting for acid pH. Moreover, the adsorption of this compound we described by the kinetic models of Langmuir and Freundlich.

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Section: Adsorption Isothermmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

REMOVAL OF Cr (VI) FROM AQUEOUS SOLUTION BY ADSORPTION ON THE NATURAL AND ACTIVATED FLUORAPATITE

Billah¹,

Elyamani²,

Rakhila³

et al. 2019

RJC

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“…In this case, the commercial and environmental use of zeolite is almost unlimited. Zeolite can be applied to adsorption (Neolaka et al, 2017;2018;Kurniawan et al, 2020), ion exchange, and catalyst processes (Hudiyono et al, 2012;Kusuma et al, 2013;Yulizar et al, 2016;Król and Mozgawa, 2019). The adsorption process gained is a promising method for a long-term treatment and economically proven (Ariffin et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Indonesia’s Natural Zeolite as an Adsorbent for Toxic Gases in Shrimp Ponds

Anggoro¹,

Sumantri²,

Buchori³

2021

J. Ecol. Eng.

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The objective of this research was to produce safe water for shrimp by using zeolite as adsorbent to absorb unwanted substances (NH 3 and H 2 S). In particular, this study also aimed to design the shrimp pond water treatment equipment, effect of flow rate on zeolite ability to absorb toxic gases (NH 3 and H 2 S), and rate of absorption (K) and reaction (k). The adsorbent is zeolite which has adsorption properties, high surface area and pores suitable for water (3Å). Then, the concentration of ammonia, hydrogen sulfide was analyzed using Ammonia Test Kit and Hydrogen Sulphide of Hach Hydrogen Sulfide Test Kit. The materials used in this study were zeolite of Malang (East Java, Indonesia) and shrimp pond water. The best result of NH 3 and H 2 S adsorption obtained at a flow rate of 3 L•min -1 . The best adsorption constant value (K) achieved by a flow rate of 3 L•min -1 . On the basis of the best value of R 2 , NH 3 and H 2 S adsorption, it can be classified in the first-order kinetic model with R 2 of 0.9763 and a k value of 0.0007 hours -1 with a flow rate of 6 L•min -1 . From the data above, it can be calculated that the adsorbent needed in the adsorption of NH 3 and H 2 S in a scale shrimp pond requires 18 kg of Malang zeolite with a column height of 3.62 m of adsorbent, a diameter of 2.07 m, and a column volume of 12.21 m 3 .

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“…Therefore this dye must be removed out from the waste of the textile industry before being discharged into the aquatic environment 1 . Adsorbents such as activated carbon [2][3][4][5] and activated natural zeolite 6 have been prepared and used to adsorb dyestuff from aqueous solution. Especially for natural zeolite, as a low cost and excellent material where can be modified and used in many applications.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Methylene Blue Using Acid Activated Green Color Natural Zeolite From Ende-Flores, Indonesia

Neolaka¹,

Kalla²,

Malelak³

et al. 2018

RJC

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The natural zeolite green color (GCNZ) from Ende-Flores, Indonesia has been activated with several acid solution series, characterized by XRF spectroscopy and used for methylene blue (MB) adsorption from aqueous solution. The characteristic of XRF showed that the natural zeolite has mainly composed of mordenite with Si/Al ratio of GCNZ before and after acid activated is 7.34 % and 16.28 % respectively. Surface area study was found out using the methylene blue adsorption method whereas adsorption process was done by the batch system. It was shown that average of surface area for GCNZ and activated green color natural zeolite (AGCNZ) is 49.069 m 2 /mol and 265.946 m 2 /mol respectively. The maximum adsorption capacity of MB onto the surface of GCNZ is 42.441 mg/g whereas AGCNZ is 87.592 mg/g. Kinetic modeling studies showed the adsorption process fits with pseudo-first-order rate mechanism. Isotherm studies show that adsorption process is best to describe by Freundlich isotherm model. Also, the thermodynamic process indicates that adsorption is an exothermic process and spontaneous.

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Adsorption of Hexavalent Chromium From Aqueous Solutions Using Acid Activated of Natural Zeolite Collected From Ende-Flores, Indonesia

Cited by 9 publications

References 14 publications

REMOVAL OF Cr (VI) FROM AQUEOUS SOLUTION BY ADSORPTION ON THE NATURAL AND ACTIVATED FLUORAPATITE

REMOVAL OF Cr (VI) FROM AQUEOUS SOLUTION BY ADSORPTION ON THE NATURAL AND ACTIVATED FLUORAPATITE

Indonesia’s Natural Zeolite as an Adsorbent for Toxic Gases in Shrimp Ponds

Adsorption of Methylene Blue Using Acid Activated Green Color Natural Zeolite From Ende-Flores, Indonesia

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