Article
Microbiology
Yunhong Huang, Jie Tang, Bei Zhang, Zhong-Er Long, Haiyan Ni, Xueqin Fu, Long Zou
Summary: Microbial reduction is an effective method to deal with hexavalent chromium contamination, and this study investigated the influence of environmental factors on the removal of Cr(VI) by a newly isolated bacterium, Exiguobacterium sp. PY14. The research revealed the reduction mechanism and identified genes involved in Cr(VI) metabolism. The findings provide valuable information for the potential application of Exiguobacterium sp. PY14 in Cr(VI) removal in actual environments.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Microbiology
Paloma Lara, Leticia Vega-Alvarado, Diana X. Sahonero-Canavesi, Michel Koenen, Laura Villanueva, Fernando Riveros-Mckay, Enrique Morett, Katy Juarez
Summary: Strain AqSCr is able to resist high concentrations of Cr(VI) and has the capability to reduce Cr(VI), with resistance independent of the ChrA efflux transporter. Under Cr(VI)-adapted conditions, there were significant transcriptional changes in genes associated with oxidative stress, DNA repair, and other cellular processes.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Suchi Parvin Biki, Shobuz Mahmud, Sumaia Akhter, Md Jiaur Rahman, Jessica J. Rix, Md Adnan Al Bachchu, Maruf Ahmed
Summary: In this study, bacteria were separated from landfill soil and their ability to degrade LDPE was evaluated. Ralstonia sp. strain SKM2 and Bacillus sp. strain SM1 were identified as effective LDPE-degrading microorganisms, causing weight loss and pH changes in the media. Structural changes in LDPE sheet were observed under microscope and FTIR analysis showed alterations in carbon bonds and groups.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Green & Sustainable Science & Technology
Huawen Han, Peizhi Song, Zhuoshan Cai, Weijun Dong, Aman Khan, Ke Yang, Yitian Fang, Pu Liu, Ondrej Masek, Xiangkai Li
Summary: This study developed a magnetic biochar (MB) to immobilize a novel chromate reductase NfoR via covalent binding, which showed enhanced activity in reducing Cr(VI) to Cr(III). The mechanism of Cr(VI) reduction by MB-NfoR was found to involve NfoR catalysis and persistent free radicals (PFRs). The addition of Cu(II) further increased the activity of MB-NfoR. Application-wise, MB-NfoR was effective in simultaneous removal of Cr(VI) and Cu(II) in smelting wastewater, without phytotoxicity and with enrichment of oligotrophic bacteria.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Arukula Deepa, Astha Singh, Aakansha Singh, Brijesh Kumar Mishra
Summary: The biosorption efficacy of Bacillus strain DPAML065 for removing toxic hexavalent chromium (VI) ions from synthetic wastewater was evaluated through batch experiments, revealing a high removal efficiency and reduction mechanism under certain conditions. This indicates its potential as an environmentally friendly wastewater treatment technology.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Ashley B. Davidson, Chris Holmden, Sulung Nomosatryo, Cynthia Henny, Roger Francois, Sean A. Crowe
Summary: The leaching of lateritic soils in Central Sulawesi Island, Indonesia can lead to drainage waters with high concentrations of Cr(VI). A remediation strategy involving FeSO4 solutions effectively removes Cr(VI) from the drainage, but the presence of Mn oxides may cause the oxidative remobilization of Cr(III) and lead to an increase in Cr(VI) concentration downstream. Further improvements to Cr(VI) remediation should focus on preventing the back reaction of Cr(III) with Mn oxides.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Huixin Xiong, Yang Liu, Shuyue Wang, Shibei Zhu
Summary: Chemical or biological synthesized iron hydroxides, such as schwertmannite and akaganeite, show high potential for removing chromium ions in polluted wastewater. The adsorption capacity of these materials for Cr(VI) is strong, with maximum adsorption achieved at pH 7.0. Phosphate ions have a greater impact on Cr(VI) adsorption than sulfate and carbonate ions. Moreover, schwertmannite and bioakaganeite exhibit good regeneration ability at temperatures of 288-318 K. Therefore, schwertmannite and bioakaganeite have promising applications in the treatment of acidic/neutral chromate-containing wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Tianyuan Gu, Wenjing Niu, Yongming Wu, Lili Huo, Zulfiqar Ahmad, Mi Deng, Hua Zhong
Summary: Molasses has potential for both chemical reduction and bioreduction of Cr(VI) in groundwater. Low concentration of molasses can significantly enhance bioreduction of Cr(VI) and outperforms sucrose. Bacillus sp., isolated from the site soils, can reduce Cr(VI) using molasses as the sole carbon source.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Hrudananda Sahoo, Kanika Kisku, Kumar S. K. Varadwaj, Prasannajit Acharya, Umesh Chandra Naik
Summary: This study focused on investigating the mechanism of chromate reduction and found that the Rhizobium pusense CR02 strain exhibited high resistance to Cr(VI). Extracellular and intracellular chromate reductases were involved in the reduction process. The extracellular polymeric substances produced by the strain enhanced the reduction activity. Furthermore, treatment of CMQW with the bacterial isolate reduced chromosomal aberrations in root cells. These findings suggest the potential application of Rhizobium pusense CR02 for Cr(VI) detoxification.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Qing Wu, Qiannan Li, Ying Zhang, Ruihan Wan, Sen Peng
Summary: This study isolated two novel Cr(VI)-reducing bacteria from a Cr salt plant and optimized their reduction conditions. It was found that Agrobacterium sp. Cr-1 showed a high capacity for Cr(VI) reduction, making it a promising candidate for the remediation of Cr(VI)-contaminated sites.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Liang Shi, Xuan Zhao, Kecheng Zhong, Qiyuan Jia, Zhenguo Shen, Jianwen Zou, Yahua Chen
Summary: Pisolithus sp. 1 is an ectomycorrhizal fungus with a strong Cr(VI) tolerance and reduction ability. This study investigated its physiological mechanism and relationship between Cr(VI) reduction and denitrification. The results showed that Cr(VI) induced elevated nitrate reductase activity and NO production in the mycelia, which was inhibited by NR inhibitor. NO was generated via NR-regulated denitrification. The study also found that P sp. 1 can secrete substances to combine with Cr(III) in a culture system.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Yawen Gu, Xiaoxia Chen, Liqiang Liu, Saifei Wang, Xinran Yu, Zhenhua Jia, Xiaohui Zhou
Summary: This research discovered an exceptional novel bacterium, Bacillus para-mycoides Cr6, which is capable of removing hexavalent chromium (Cr(VI)). The study investigated the molecular biology behind its removal mechanism and identified two key genes, bcr005 and bcb765, that play a role in the removal process. These genes encode the Cr(VI)-reductase BCR005 and Cr(VI)-binding protein BCB765, respectively, and their synergistic expression is essential for Cr(VI) removal by Cr6. This research provides a deeper understanding of the molecular mechanism of Cr(VI) removal and highlights the potential practical applications of BCR005 and BCB765 enzymes in the remediation of Cr-contaminated water.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Multidisciplinary Sciences
Punam Thapa, Alina Thapa, Sujan Khadka, Sanjeep Sapkota, Om Prakash Panta, Suprina Sharma, Tika Bahadur Karki, Pramod Poudel
Summary: The study identified potential Bacillus strains as efficient producers of γ-PGA through physiological, biochemical, morphological, and molecular characterization, confirming certain Bacillus species as potent gamma-PGA producers. Under optimal conditions, these isolates exhibited excellent growth and yield of gamma-PGA.
Article
Microbiology
Limin Xue, Liu Tang, Juanjuan Zhao, Zhenjuan Fang, Hanxu Liu, Jianjun Qiao, Guishan Zhang
Summary: Strain WN066(T) isolated from saline-alkali wetland soil in Tianjin, China represents a novel species within the genus Bacillus, named B. salipaludis sp. nov. This strain is able to grow under high salt and alkaline conditions, and possesses unique cellular fatty acids and polar lipids.
ARCHIVES OF MICROBIOLOGY
(2021)
Article
Environmental Sciences
Zhibo Zeng, Wen Yue, Cermon Kined, PengPeng Wang, Ran Liu, Jing Liu, Xinzhu Chen
Summary: This study found that Bacillus licheniformis could effectively restore gut microbial dysbiosis and inflammation levels induced by ceftriaxone sodium treatment, which is important for maintaining intestinal health.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Biotechnology & Applied Microbiology
Meora Rajeev, T. J. Sushmitha, Krishnan Ganesh Prasath, Subba Rao Toleti, Shunmugiah Karutha Pandian
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2020)
Article
Chemistry, Analytical
Arul Anantha Kumar, Swetha Sonwani, D. Bakkiam, N. Ramanathan, Subba T. Rao
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2020)
Article
Environmental Sciences
Meora Rajeev, T. J. Sushmitha, Chairmandurai Aravindraja, Subba Rao Toleti, Shunmugiah Karutha Pandian
Summary: This study investigated the response of bacterial communities in coastal sediment of India to heavy metals, revealing distinct variations in bacterial diversity and composition in areas with different pollution levels. Higher proportions of certain metal-resistant bacterial genera were found in significantly contaminated areas, with differences also observed in predictive functional profiles. The study highlights the influence of heavy metals on shaping sedimentary microbiota in coastal regions.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Biotechnology & Applied Microbiology
Uday Kumar Banala, Nilamadhab Prasad Indradyumna Das, Subba Rao Toleti
Summary: This review discusses the critical role of different biological groups in uranium bioremediation, emphasizing the interactions between metal and microorganisms. Various strategies using different microbial agents to adsorb, accumulate, reduce, or mineralize uranium are explored to limit contamination in the environment. The importance of biological agents and factors associated with the bioremediation of uranium polluted sites is highlighted.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
T. Manobala, Sudhir K. Shukla, T. Subba Rao, M. Dharmendira Kumar
Summary: This study focuses on the kinetic modeling of uranium biosorption by Deinococcus radiodurans biofilm biomass, indicating the process is spontaneous and exothermic. The sorption of U(VI) by D. radiodurans biofilm biomass is suggested to follow a pseudosecond-order reaction. Chemical modifications in surface functional groups of the biofilm biomass significantly impact uranium binding capacity.
Article
Engineering, Mechanical
T. Subba Rao, S. Bera
Summary: The study found that the pitting and erosion corrosion of aluminium brass condenser tubes in a seawater cooled nuclear power station was caused by inadequate ferrous sulphate dosing and relatively excess chlorine concentrations. Microscopic studies and surface chemical analysis were carried out to understand the mechanism of corrosion, with major corrosion product identified as copper chloride. Detailed XPS study has provided valuable supportive data to elaborate on the mechanism of Al-brass chemical corrosion.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Biotechnology & Applied Microbiology
T. Subba Rao, P. S. Murthy, P. Veeramani, D. S. Narayanan, R. Ramesh, B. N. Jyothi, D. Muthukumaran, M. Murugesan, A. Vadivelan, G. Dharani, J. Santhanakumar, G. A. Ramadass
Summary: This study investigated marine biogrowth infestation of a seawater intake system, recording variations in biomass density and diversity of organisms at different depths. The research provides insights into the extent and type of marine biogrowth phenomena with depth, as well as describing biofouling preventive methods.
Article
Engineering, Environmental
Uday Kumar Banala, Nilamadhab Prasad Indradyumna Das, Subba Rao Toleti
Summary: This study explored the sequestration of uranium by bacteria isolated from alkaline wastewaters, with the strain Bacillus aryabhattai showing superior sequestration capacity. The results indicated that the uranium sequestration process was dependent on active metabolism, and the kinetics study fit well with the pseudo-second-order model. The findings suggest that the isolated alkaliphilic bacteria have significant potential for treating uranium-containing alkaline wastewaters.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Multidisciplinary Sciences
T. J. Sushmitha, Meora Rajeev, P. Sriyutha Murthy, S. Ganesh, Subba Rao Toleti, Shunmugiah Karutha Pandian
Summary: This study investigated the succession of biofilm-forming bacterial communities on stainless steel, high-density polyethylene, and titanium substrata over 15 days in the southern coastal region of India. The results showed that temporal succession had a profound influence on the early-stage biofilm-forming microbiota, overshadowing the influence of substrate material. Different substrate types did not exhibit specific bacterial groups, indicating that temporal dynamics played a key role in biofilm formation.
Article
Biotechnology & Applied Microbiology
Uday Kumar Banala, Nilamadhab Prasad Indradyumna Das, Ranjib Kumar Padhi, Subba Rao Toleti
Summary: The study identified two bacteria, MPW02 and MPW03, isolated from uranium mine wastewaters, with the potential to sequester uranium from carbonate-containing alkaline wastewaters. However, the sequestering property of the two isolates was negatively impacted at different carbonate-bicarbonate buffer concentrations. The investigation revealed distinct mechanisms of uranium sequestration by the two isolates, indicating their potential application in treating alkaline wastewaters containing uranium.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Optics
Pratyasha Sahani, Saranya Narayanan, B. V. R. Tata, Soma Venugopal Rao
Summary: This study calculates the internal electric field distribution in colloidal photonic crystal thin films and investigates the field distribution at on-resonance and off-resonance incident wavelengths. The results reveal that the internal electric field is localized and enhanced in the air void region between the dielectric spheres at on-resonance wavelength, and the field distribution forms a connecting network in the trilayer case at off-resonance wavelength. These findings are significant for sensing applications using the surfaced enhanced Raman scattering technique.
OPTICS COMMUNICATIONS
(2023)
Review
Microbiology
Atif Khan, T. Subba Rao, Hiren M. Joshi
Summary: Excessive use of antibiotics in COVID-19 treatment increases the likelihood of antimicrobial resistance and negatively impacts patient recovery. Phage therapy is proposed as a promising alternative treatment option that offers targeted killing and anti-inflammatory properties.
CURRENT RESEARCH IN MICROBIAL SCIENCES
(2022)
Article
Biotechnology & Applied Microbiology
Meora Rajeev, T. J. Sushmitha, Subba Rao Toleti, Shunmugiah Karutha Pandian
Article
Engineering, Environmental
Sudhir K. Shukla, Arunachalam Paraneeiswaran, T. Subba Rao
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2020)
Review
Electrochemistry
V Balasubramani, S. Chandraleka, T. Subba Rao, R. Sasikumar, M. R. Kuppusamy, T. M. Sridhar
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
