Removal of hexavalent chromium in tannery wastewater by Bacillus cereus.

06:00 EST 14th December 2011 | BioPortfolio

Summary of "Removal of hexavalent chromium in tannery wastewater by Bacillus cereus."

Bacillus cereus was used to remove chromium (Cr(VI)) from medium containing tannery wastewater under different conditions. The maximum rate of Cr(VI) removal was attained at a temperature of 37 °C, pH of 7.0-9.0, and biomass of 20 g/L when the initial Cr(VI) concentration was less than 50 mg/L. Under the optimum conditions, the Cr(VI) in tannery wastewater was treated with each cellular component of B. cereus to detect its ability to reduce Cr(VI). The results showed that the removal rate of Cr(VI) for the cell-free extracts could reach 92.70%, which was close to that of the whole cells (96.85%), indicating that the Cr(VI) reductase generated by B. cereus is primarily intracellular. Additionally, during continuous culture of the B. cereus, the strain showed good consecutive growth and removal ability. After treatment of 20 mg/L Cr(VI) for 48 h, the B. cereus was observed by SEM and TEM-EDX. SEM images showed that the B. cereus used to treat Cr(VI) grew well and had a uniform cellular size. TEM-EDX analysis revealed large quantities of chromium in the B. cereus cells used to treat Cr(VI). Overall, the results presented herein demonstrate that B. cereus can be used as a new biomaterial to remove Cr(VI) from tannery wastewater.


a College of Bioengineering, Sichuan University of Science and Engineering, Number 180, Xueyuan Street, Huixing Road, Zigong, Sichuan, 643000, People's Republic of China.

Journal Details

This article was published in the following journal.

Name: Canadian journal of microbiology
ISSN: 1480-3275


DeepDyve research library

PubMed Articles [3815 Associated PubMed Articles listed on BioPortfolio]

Evaluation of nutrients removal (NO3-N, NH3-N and PO4-P) with Chlorella vulgaris, Pseudomonas putida, Bacillus cereus and a consortium of these microorganisms in the treatment of wastewater effluents.

In this research removal of NH3-N, NO3-N and PO4-P nutrients from municipal wastewater was studied, using Chlorella vulgaris, Pseudomonas putida, Bacillus cereus and an artificial consortium of them. ...

Remediation of chromium-contaminated soil by electrokinetics and electrokinetics coupled with CaAl-LDH permeable reaction barrier.

The remediation of Cr(VI)-contaminated soil was investigated by electrokinetic (EK) and permeable-reactive-barrier assisted electrokinetic (EK-PRB). The medium of PRB was hydrocalumite (CaAl-LDH). The...

Municipal wastewater treatment by the bioaugmentation of Bacillus sp. K5 within a sequencing batch reactor.

Artificial municipal wastewater was treated successfully by the bioaugmentation of Bacillus sp. K5 capable of simultaneous nitrification and denitrification (SND) within a sequencing batch reactor (SB...

A novel two-phase bioreactor for microbial hexavalent chromium removal from wastewater.

Α novel two-phase bioreactor for the microbial removal of Cr(VI) from wastewater with high chromium concentration (up to 1350ppm) is developed. Among several potential solid-phase adsorbents tested, ...

Citric acid preacidification enhanced electrokinetic remediation for removal chromium from chromium residue contaminated soil.

Electrokinetic experiments were conducted on chromium residue contaminated soils collected from a chemical plant in China. Acidification-electrokinetic remediation technology was proposed in order to ...

Clinical Trials [807 Associated Clinical Trials listed on BioPortfolio]

Chromium and Insulin Resistance

Chromium is an essential nutrient for the maintenance of normal glucose tolerance and its deficiency causes insulin resistance. Chromium administration has also been shown in several studi...

Chromium's Effect on Insulin Resistance in Obesity

This research is to investigate the nutritional supplement chromium picolinate. A large number of people use chromium picolinate from health food stores to improve the function of the hor...

Binge Eating and Chromium Study

The purpose of this study is to test the feasibility and preliminary efficacy of a 6-month chromium picolinate (CrPic) treatment trial in binge eating disorder (BED).

Effects of Chromium on Insulin Resistance in Alzheimer Disease Patients

The effect of Chromium to improve glucose levels in Alzheimer Disease (AD) is controversial. The hypothesis of the study is to evaluate the effect of supplementing the AD individuals with ...

Effects of Chromium Picolinate on Food Intake

The purpose of this study is to test the effects of chromium picolinate on food intake, food cravings, eating attitudes, and appetite. If chromium picolinate is found to have a beneficial...

Medical and Biotech [MESH] Definitions

A species of rod-shaped bacteria that is a common soil saprophyte. Its spores are widespread and multiplication has been observed chiefly in foods. Contamination may lead to food poisoning.

Stable chromium atoms that have the same atomic number as the element chromium, but differ in atomic weight. Cr-50, 53, and 54 are stable chromium isotopes.

Unstable isotopes of chromium that decay or disintegrate emitting radiation. Cr atoms with atomic weights of 46-49, 51, 55, and 56 are radioactive chromium isotopes.

A metalloproteinase which degrades helical regions of native collagen to small fragments. Preferred cleavage is -Gly in the sequence -Pro-Xaa-Gly-Pro-. Six forms (or 2 classes) have been isolated from Clostridium histolyticum that are immunologically cross-reactive but possess different sequences and different specificities. Other variants have been isolated from Bacillus cereus, Empedobacter collagenolyticum, Pseudomonas marinoglutinosa, and species of Vibrio and Streptomyces. EC

Inorganic compounds that contain chromium as an integral part of the molecule.

Quick Search

DeepDyve research library

Relevant Topic

A biomaterial is defined as a substance that has been engineered to take a form which, alone or as part of a complex system, is used to direct, by control of interactions with components of living systems, the course of any therapeutic or diagnostic proc...

Searches Linking to this Article