Article
Energy & Fuels
Gopal Suresh, Balamuralikrishnan Balasubramanian, Nagaiya Ravichandran, Balasubramanian Ramesh, Hesam Kamyab, Palanivel Velmurugan, Ganesan Vijaiyan Siva, Arumugam Veera Ravi
Summary: This study evaluated the ability of Bacillus thuringiensis and Staphylococcus capitis isolated from tannery industry sediment to detoxify Cr(VI). The optimal conditions for reducing hexavalent chromium were found to be 35 degrees Celsius and pH 7. The results showed that both bacterial strains were capable of reducing Cr(VI) effectively, with significant reductions achieved at a primary concentration of 50 μg/mL.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Engineering, Environmental
Xuejiao An, Zhengbin Zong, Qinghua Zhang, Zhimin Li, Min Zhong, Haozhi Long, Changzhi Cai, Xiaoming Tan
Summary: The study focused on utilizing thermo-alkali-stable cellulase-producing bacteria to degrade cellulose in papermaking black liquor. Co-culturing significantly increased cellulose degradation rates, and the addition of cosubstrates further boosted the degradation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Fahimeh Kookhaee, Akram Sadat Tabatabaee Bafroee, Leila Jabalameli
Summary: This study investigated the tolerance of indigenous bacteria from tannery effluents to chromium (VI) and found that bacteria with high chromium tolerance may be used for bioremediation of tannery effluents.
JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Yuchen Zhou, Zezhi Chen, Huijuan Gong, Ziyi Yang
Summary: Thermal decomposition is a promising technology for tannery sludge disposal, where different processes were simulated to investigate the transformation of Cr species. The study found that pyrolysis is the safest method for Cr fixation and reuse.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Arghyadeep Bhattacharjee, Rajarshi Chaudhuri, Priyanshu Pandey, Arup Kumar Mitra
Summary: West Bengal has numerous leather industries leading to a large amount of leather processing annually. Tannery effluents cause soil and water pollution, with chromium being a well-known toxic contaminant. The study focused on bioremediation potential of common microflora from tannery wastewater, with Isolate 1 showing the highest chromium reduction ability and Isolate 4 demonstrating the highest enzyme activities. The efficient microorganisms identified in the study play a crucial role in combating pollution, especially in water bodies affected by industrial waste mismanagement.
JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT
(2021)
Article
Microbiology
Asma Kalsoom, Nazia Jamil, Syed Mujtaba ul Hassan, Junaid Ahmed Khan, Rida Batool
Summary: A chromate-resistant bacterial strain named Enterobacter cloacae UT25 was isolated from tannery effluent, which showed resistance to heavy metal ions and antibiotics. The strain was capable of removing a high percentage of chromate in a short incubation time and had a high minimum inhibitory concentration for chromate. Various microscopy techniques confirmed the effect of chromate stress on the cell morphology and the mechanism of chromate removal by the bacterium. Additionally, the partial gene sequence analysis indicated a homology with a known plasmid gene. Overall, E. cloacae UT25 has great potential in chromate removal from polluted environments.
CURRENT MICROBIOLOGY
(2023)
Article
Environmental Sciences
Xuehan Wang, Ying Zhang, Xiaojie Sun, Xianchao Jia, Yin Liu, Xinfeng Xiao, Hongge Gao, Lin Li
Summary: In this study, a chromium-resistant strain Y2-7 was isolated from oil-contaminated soil and its optimal conditions for chromium removal using glucose were determined. The results showed that strain Y2-7 has great potential for chromium bioremediation.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Salima Tighidet, Frederic Plewniak, Amalia Sayeh, Lisa Gil, Celine Vandecasteele, Celine Lopez-Roques, Mouloud Kecha, Philippe N. Bertin
Summary: A heavy metal resistant actinobacterial strain was isolated from a lead and zinc mine in Algeria. It showed high resistance to various heavy metals and had the ability to degrade different types of dyes. The strain has potential applications in the bioremediation of textile dyeing industry effluents.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Green & Sustainable Science & Technology
Dafne Lecca-Caballero, Eyber Vega-Moreno, Luis Cabanillas-Chirinos, Karen Diaz Del Aguila, Walter Rojas-Villacorta, Waldo Salvatierra-Espinola, Renny Nazario Naveda, Segundo Rojas-Flores, Magaly de la Cruz-noriega
Summary: Heavy metal contamination of water is a significant problem in Peru, posing a potential threat to the ecosystem. Bacteria, such as Serratia marcescens, offer an ecological alternative for treating these effluents. This research investigates the influence of temperature and pH on lead bioremoval in surface water and identifies optimal treatment conditions.
Article
Engineering, Environmental
Arumugam Arul Prakash, Aruliah Rajasekar, Raja Kumaresan Sarankumar, Mohamad S. AlSalhi, Sandhanasamy Devanesan, Mamduh J. Aljaafreh, Muthusamy Govarthanan, Shaban R. M. Sayed
Summary: This study focused on the application of bio-electrokinetic remediation for tannery effluent contaminated soil, successfully achieving bioreduction of hexavalent chromium to trivalent chromium and significant removal of total chromium and organic content. The presence of pollutant degrading microbes enhanced the bioreduction process during the electrokinetic remediation, showcasing the potential of this technique in treating polluted soils efficiently.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Xingqing Zhao, Ding Tang, Yi Jiang
Summary: The Bacillus strain T124 can reduce Cr(VI) to a less toxic state and mineralize it, reducing the migration and bioavailability of Cr(VI) in the environment. The mechanism involves biological reductase reducing Cr(VI) toxicity and increasing urease activity, leading to the formation of CaCO3 and Ca10Cr6O24(CO3).
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Bing Shan, Ruixia Hao, Hui Xu, Junman Zhang, Jiani Li, Yinhuang Li, Yubo Ye
Summary: Microbial remediation using reduction of Cr(VI) to Cr(III) is a promising method to lower toxic environmental chromium levels. In this study, a Cr(VI)-resistant fungal strain named Fusarium proliferatum S4 (F proliferatum) was isolated from heavily chromium-polluted soil. The strain showed a high removal capacity for chromium-containing solutions, and different cell fractions contributed differently to Cr(VI) removal. The observations from electron microscopy and spectroscopy techniques revealed the involvement of both cell surfaces and intracellular contents in Cr binding. The study provides insights into the efficiency and mechanisms of microbial Cr(VI) bioreduction in chromium-contaminated environments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Soumaya Rezgui, Mouna Ghazouani, Latifa Bousselmi, Hanene Akrout
Summary: This study aims to investigate the feasibility of using single and sequential electro-Fenton and electrocoagulation processes for treating tannery wastewater. The hybrid 2 h EF-5 h EC process achieves (88.1 +/- 4.8)% COD removal rate and total elimination of Cr, meeting the allowable discharge limits. The analysis of other parameters reveals a significant reduction in electric energy consumption. The XRD analysis of the precipitate and sludge provides insights into their potential valorization or reuse.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Tan Phat Chau, Laura Bulgariu, Mythili Saravanan, R. Rajkumar, Arunachalam Chinnathambi, Saleh H. Salmen, G. K. Jhanani
Summary: This research investigates the potential of Aspergillus niger and Aspergillus tubigenesis in bioremediation of tannery effluent. The fungal biomass immobilized on corncob and coir material demonstrated significant multi-pollutant adsorption potential. The study also showed reduced toxicity and improved seed germination of Oriza sativa seeds. Further field investigation is needed to assess the feasibility of this strategy.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Angeliki Banti, Orestis Grammenos, Evgenios Kokkinos, Aikaterini Touni, Sotiris Sotiropoulos, Anastasios Zouboulis
Summary: The electrochemical oxidation of trivalent chromium from leather tanning mud waste leachates was conducted using a PbOx/Pb anode electrode. The study found that at pH=3, the oxidation of Cr(III) was more efficient. Further optimization of the process resulted in nearly 70% conversion and a current efficiency of nearly 60%. This method could be a promising route for the conversion of Cr(III) to Cr(VI) in tannery wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)