Adsorption studies on the removal of hexavalent chromium from aqueous solution using a low cost fertilizer industry waste material

Gupta, Vinod Kumar; Rastogi, Arshi; Nayak, Arunima

doi:10.1016/j.jcis.2009.09.065

Cited by 571 publications

(206 citation statements)

References 36 publications

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“…The pseudo-second-order model is based on the assumption that the rate-limiting step may be chemical sorption or chemisorption involving valence forces through sharing or exchange of electrons between sorbent and sorbate. It is assumed that the sorption capacity is proportional to the number of active sites occupied on the sorbent, then the kinetic rate law can be written as follows (Kamari et al 2009;Ngah et al 2011;Tao et al 2010;Wang et al 2011;Zhang and Bai 2003;Bhaumik et al 2012;Elwakeel and Yousif 2010;Gupta and Rastogi 2008;Gupta et al 2010;Kose and Kivanc 2011;Ehrampoush et al 2011;Chen et al 2010;Ugurlu et al 2005;Okoye et al 2010;Wang et al 2008b;Elkady et al 2011):…”

Section: Adsorption Kineticmentioning

confidence: 99%

Removal of humic acid from peat water using untreated powdered eggshell as a low cost adsorbent

Zulfikar

Novita²,

Hertadi

et al. 2013

Int. J. Environ. Sci. Technol.

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The main objective of this study is to investigate the possibility of powdered eggshell used as an adsorbent material for removal of humic acid from peat water. The influences of contact time, dose of eggshells, pH, and temperature were the factors considered in the removal processes of humic acid from peat water. In addition, adsorption isotherms of humic acid onto the powdered eggshell were also evaluated with the Langmuir and Freundlich approximations. Our results showed that the equilibrium of the process was eventually established after 60 min of the contact time, and also found that using 5 g of the powdered eggshell nearly 95 % of humic acid has been successfully removed from the peat water. The removal of humic acid gave better result when it was conducted at low pH, and it was almost unaffected the temperatures variation. The data was well fitted to Freundlich isotherm with the correlation coefficient of not \0.999, and could uptake the humic acid about 126.58 mg/g at pH 4.01, estimated from the Langmuir model. The kinetic experimental data proportionally correlated with the pseudo-second-order kinetic model with a rate constant in the range of 0.016-0.112 g mg -1 min -1 , while intra-particle-diffusion were the main rate determining step in the humic acid removal process. The powdered eggshell investigated in this study, thus, exhibited as a high potential adsorbent for the removal of humic acid from peat water.

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Section: Adsorption Kineticmentioning

confidence: 99%

Removal of humic acid from peat water using untreated powdered eggshell as a low cost adsorbent

Zulfikar

Novita²,

Hertadi

et al. 2013

Int. J. Environ. Sci. Technol.

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“…TSS value was significantly different (p < 0.05) across the sampling stations and between the months throughout the study. The slight varying value for all stations and thus, closer were indicative of industrial pollution at its onset [5]. In addition, the unprecedented increase in TSS for station B could also be due to the fact that cement effluent discharged into water bodies are usually untreated and contain organic and inorganic compounds, and/or micro-organisms [6].The total dissolved solid fluctuated between 55.8 to 180 mg/l for this study.…”

Section: Resultsmentioning

confidence: 79%

Untitled

2017

RJLBPCS

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Water pollution due to industrial activities has been destructive and recognized as a major environmental concern due to their occurrence and persistence. The hasty development of cement manufacturing in the state of Rajasthan of India has caused a severe anxiety to the ecological and social scientist. Pollution due to mining and cement industries in varying degree in air, water and soil and its consequences on living beings have been observed and reported. In the present research work effluent water samples from cement Industries were collected and analysed for different physicochemical parameters viz. pH, BOD, COD, TSS and TDS. The results revels that the effulent water form cement industries is not fit for any domestic use.

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“…Moreover, the applicability of adsorption in the removal of heavy metals has been investigated by multiple researchers [27][28][29][30][31]. These studies confirmed the potential use of adsorption as an appropriate technique for the removal of various heavy metals.…”

Section: Introductionmentioning

confidence: 84%

Wastewater treatment in petroleum activities: example of “SEWAGE” unit in the BG Tunisia Hannibal plant

Ghnainia¹,

Eloussaief

Zouari³

et al. 2016

Appl Petrochem Res

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This paper provides a detailed analysis of the sewage system procedure, as well as the occurring problems during the operation of the system and the required corrective actions that should be taken. In the Hannibal gas plant, the used water is exploited from a local deep well drilled in the plant. However, before being used in both of gas process and domestic activities, this water is treated in a specified unit called ''Metito Unit'' to obtain an overpurified water that can meet with the chemical requirements of the oil/gas process and the health and environment standards. After several steps of the process, the polluted wastewater resulting from several activities within the plant is treated in the ''Sewage Unit''. This unit decontaminates wastewater from polluting factors, using the ''Extended Aeration Method''. We have shown that in spite of the efficient methods used in the sewage system procedure, several problems can occur during the operating of the system such as hydraulic overloading, high SVI, high Fm ratio, which causes high level of organic pollutants (BOD5 = 42 mg/l), chemical pollution (COD = 85 mg/l), high level of pH 8, chloride (1900 mg/ l), and iron (8300 mg/l). We suggest that the quality of the treated wastewater should be improved by the addition of other processes such as constructed wetland process, photo-catalytic oxidation technique which is one of the most efficient methods of wastewater treatment, to produce water quality that is very similar to that of the natural waters.Résumé Généralement, de très importantes quantités d'eau sont utilisées dans le secteur d'activités pétrolières pour les procédés du raffinage du pétrole et/ou du gaz ainsi que pour les usages domestiques dans la raffinerie. Les eaux usées qui résultent après les dernières étapes du traitement du pétrole ou du gaz seront rejetées dans la nature après avoir subir un traitement d'épuration pour être compatible avec les normes standard de préservation de l'environnement. Dans ce contexte, nous nous proposons d'étudier l'exemple de l'unité de traitement des eaux usées (sewage unit) dans la raffinerie Hannibal de traitement du gaz naturel de la compagnie BG Tunisia. Dans le chantier Hannibal, situé à 23 km au sud de Sfax, les eaux utilisées sont explorées d'un puits local creusé dans le chantier lui même, ces eaux sont d'abord traitées dans une station d'épuration appelée Metito unit, et ce avant d'être utilisées dans les différentes unités du chantier et les différentes activités domestiques. Après cet usage, les eaux résiduelles sont polluées et sont pour ce fait traitées dans une unité spécifique appelée Sewage Unit dans laquelle les eaux usées passent par des opérations physiques, chimiques et biologiques permettant leur décontamination autant que possible des facteurs polluants. La technologie appliquée dans l'unité de traitement des eaux usées ''sewage unit'' est basée sur la méthode dite ''méthode d'aération poussée''. Cette méthode consiste en quatre opérations principales à savoir: le criblage ou dépista...

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Adsorption studies on the removal of hexavalent chromium from aqueous solution using a low cost fertilizer industry waste material

Cited by 571 publications

References 36 publications

Removal of humic acid from peat water using untreated powdered eggshell as a low cost adsorbent

Removal of humic acid from peat water using untreated powdered eggshell as a low cost adsorbent

Untitled

Wastewater treatment in petroleum activities: example of “SEWAGE” unit in the BG Tunisia Hannibal plant

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