Effective Removal of Chromium (VI) Ions from Tannery Effluent using Chitosan-Alumina Composite

2016 ◽  
Vol 10 (3) ◽  
pp. 1-12 ◽  
Author(s):  
Mrinal Kabiraz ◽  
Ismet Jahan ◽  
Shah Masum ◽  
Md. Islam ◽  
S. Hassan ◽  
...  
Keyword(s):  
Tannery Effluent ◽  
Chromium Vi ◽  
Effective Removal ◽  
Alumina Composite

Effect of Process Parameters on the Adsorption of Chromium VI on a Packed Bed Column (PBC) using Vetiver (Vetiveria zizanioides)

2021 ◽  
Vol 25 (12) ◽  
pp. 53-59
Author(s):  
Pejavara Narayana Gururaj ◽  
Kulathooran Ramalakshmi ◽  
Sureshkumar Sujithra ◽  
Ravichandran Shalini
Keyword(s):  
Process Parameters ◽  
Oxygen Demand ◽  
Packed Bed ◽  
Heating Process ◽  
Tannery Effluent ◽  
Vetiveria Zizanioides ◽  
Experimental Conditions ◽  
Heated Sample ◽  
Packed Bed Column ◽  
Chromium Vi

The objective of this study is to evaluate the different process parameters on adsorption of chromium VI on a packed bed column using Vetiver (Vetiveria zizanioides) and to examine the effect of pH, Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD) at a constant contact time of 10 minutes at a temperature of 40 ºC under two experimental conditions namely, tannery effluent with and without microwave treatment. The results revealed that microwave heating process had a higher impact on chromium (VI) adsorption than normal heating process. The pH values of microwave treated sample were found to be 6.65±0.65 when compared to normal heated sample where the pH was 4.62±0.72 when compared to the initial pH of effluent found to be 3.47±0.58. Further, a threefold reduction in BOD and COD values was observed in microwave treated vetiver sample which was around 86.73±1.43 and 107.90±2.82 mg/l respectively when compared to normal heated sample (250±1.45 and 200±2.65 mg/l respectively) and untreated effluent (780±2.53 and 920±3.86 mg/l respectively) which indicated the reduction of chromium VI present in the effluent water. It was also observed that the metal adsorption capacity of the vetiver powder and the adsorption characteristics were positively correlated with the FTIR and SEM analysis which confirmed the presence of chromium (VI) on the surface of vetiver.

Chromium (VI) Ions Removal from Tannery Effluent using Chitosan-Microcrystalline Cellulose Composite as Adsorbent

2016 ◽  
Vol 10 (4) ◽  
pp. 1-14 ◽  
Author(s):  
Shahida Yasmeen ◽  
Mrinal Kabiraz ◽  
Badhan Saha ◽  
Md. Qadir ◽  
Md. Gafur ◽  
...  
Keyword(s):  
Microcrystalline Cellulose ◽  
Tannery Effluent ◽  
Chromium Vi ◽  
Cellulose Composite

Development of a rapid and reliable liquid-liquid extractive method for the effective removal of chromium(VI) from electroplating waste water and tannery effluents

2017 ◽  
Vol 62 (4) ◽  
pp. 527-538 ◽  
Author(s):  
Arjun Kokare ◽  
Vishal Suryavanshi ◽  
Sunil Zanje ◽  
Gurupad Kore ◽  
Dhuryodhan Waghmode ◽  
...  
Keyword(s):  
Waste Water ◽  
Tannery Effluents ◽  
Chromium Vi ◽  
Effective Removal

A New Cationic Poly[1-vinyl-3-ethyl imidazolium iodide], P(VEII) Hydrogel for the Effective Removal of Chromium (VI) from Aqueous Solution

2009 ◽  
Vol 46 (4) ◽  
pp. 447-454 ◽  
Author(s):  
Pratish V. Dadhaniya ◽  
Ankit M. Patel ◽  
Manish P. Patel ◽  
Ranjan G. Patel
Keyword(s):  
Aqueous Solution ◽  
Chromium Vi ◽  
Effective Removal

scholarly journals Isolation of hexavalent chromium (VI) tolerant fungi from tannery effluent and their growth responses to different concentrations of chromium (VI)

2020 ◽  
Author(s):  
Soumyajit Guha ◽  
Sampa Debnath ◽  
Saswati Gayen
Keyword(s):  
Heavy Metal ◽  
Hexavalent Chromium ◽  
Morphological Characteristics ◽  
Blue Staining ◽  
Tolerance Index ◽  
Tannery Effluent ◽  
Industrial Complex ◽  
Growth Responses ◽  
Fungal Strains ◽  
Chromium Vi

The main objective of this study was to isolate, characterize, and determine chromium (VI) tolerance capacities of fungal strains from tannery effluent of the Kolkata Leather Complex area. Chromium (VI) is a heavy metal that is known to be toxic as well as carcinogenic. It is an important heavy metal widely used in various industries of which the tanning industry deserves special mention. The majority of Cr (VI) waste is discharged into the environment annually as a consequence of industrial and manufacturing activities. Kolkata Leather Complex is an industrial complex intended to serve as a central leather-tanning complex for Kolkata located at Bantala, near East Kolkata, India. Samples (tannery effluent) were collected in sterile capped tubes from Kolkata Leather Complex Area and brought to the laboratory for analysis. The samples were serially diluted and were plated on Czapekdox agar plates and incubated at 300C. After a few days, a number of morphologically different colonies were selected and sequentially subcultured for pure colony isolation on the same medium. They were preserved in the refrigerator at 40 C. Lactophenol cotton blue staining was done to observe and record the fungal morphological characteristics. They were further assessed for their hexavalent chromium tolerance capacities and subsequently the metal tolerance index was derived for each strain respectively. All 16 fungal strains isolated from the Kolkata Leather Complex tannery area were found to be chromium (VI) tolerant starting at 0.1mg/ml Cr (VI) concentration. Maximum chromium (VI) tolerance was displayed by sample S12 (2mg/ml) which was later identified as having 99.82% similarity with Aspergillus nomius strain.Keywords: effluent, fungi, heavy metal, isolation, hexavalent chromium, tannery, tolerance.

scholarly journals Effective Removal of Hexavalent Chromium from Polluted Water using Phoenix sylvestris Seed Powder as Adsorbent

2019 ◽  
Vol 31 (6) ◽  
pp. 1327-1331
Author(s):  
P. KARUNASRI MEGHANA ◽  
K. VENKATA PRAVALIKA ◽  
P. JANAKI SRIRAM ◽  
K. RAVINDHRANATH
Keyword(s):  
Adsorption Capacity ◽  
Hexavalent Chromium ◽  
Extraction Method ◽  
Contact Time ◽  
Industrial Effluents ◽  
Polluted Water ◽  
Chromium Vi ◽  
Effective Removal ◽  
Maximum Extraction ◽  
Fold Excess

Phoenix sylvestris seed powder (PSSP) was investigated as an adsorbent for the removal of chromium(VI) ions from water using batch extraction method. The conditions for the maximum extraction were optimized. The adsorption capacity was found to be 22.5 mg/g at pH= 2, contact time: 60 min, PSSP dosage: 0.40 g/500mL, rpm: 300 and temp.: 28 ± 2 ºC and found to be more suitable adsorbant than compared to other reported adsorbents in the literature. Co-ions even in five-fold excess were less interfered. Regeneration studies revealed that Phoenix sylvestris seed powder can be used up to three cycles. The method developed was successfully applied to polluted water/industrial effluents samples.

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