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
Chemistry, Physical
Zhongxuan Xu, Diandi Li, Yuping Tan, Qinyu Yang, Han Xiong, Jiguang Li, Hong Deng, Zhang Lin
Summary: Microbial treatment of heavy metals is a low-cost and environmentally friendly method. Different environmental media, as well as the coexistence of various metal cations, can impact the efficiency of bacteria in immobilizing chromium. The research found that the Mg(II) group has the highest chromium immobilizing rate, while Cd(II) has the strongest inhibitory effect on the reduction and immobilization of chromium.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Environmental
Veer Singh, Jyoti Singh, Vishal Mishra
Summary: In this study, chitosan coated MnO2 nanoparticles synthesized through a green route using curcumin and Citrus limetta peel extract were successfully used to biosorb and reduce Cr(VI) to less toxic Cr(III). The nanoparticles showed spherical shape, crystalline nature, and a size range of 14 to 24 nm. They exhibited high specific surface area, active binding sites for chromium ions, and were proven to be reusable over multiple cycles of adsorption-desorption. The results suggest that these nanoparticles have great potential for water treatment applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Xiaofeng Jiang, Wenjun Long, Liangqiong Peng, Teng Xu, Faming He, Yuling Tang, Wenhua Zhang
Summary: The rapid immobilization of Cr(VI) from aqueous solution was achieved by reducing it to Cr(III) using tannic acid, followed by pH-triggered precipitation of organo-Cr(III) complexes formed in the redox reaction. This eco-friendly and cost-effective method utilizes natural polyphenols derived from plants.
Article
Environmental Sciences
Hanui Yang, Namgyu Kim, Donghee Park
Summary: In this study, the harmfulness of reduced-Cr(III) was identified through assessment of mobility and toxicity in nature. Pine bark was used to remove Cr(VI) from aqueous solution. The reduced-Cr(III) showed low mobility and was virtually non-toxic, and helpful for plant growth. Our findings demonstrate that Cr(VI) biosorption technology using pine bark is a groundbreaking technology for Cr(VI) detoxification.
Article
Biochemistry & Molecular Biology
Meng Li, Chunxia Tang, Shaohai Fu, Kam Chiu Tam, Yongzhong Zong
Summary: In this study, amine functionalized cellulose-based aerogel beads (CGP) were developed for simultaneous and efficient adsorption-reduction-sequestration of Cr(VI). The adsorption capacity, mechanism, and stability of CGP were investigated in detail. Batch adsorption experiments and fixed-bed column adsorption study demonstrated the potential application of CGP beads in wastewater treatment.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Chemistry, Analytical
Hanui Yang, Namgyu Kim, Donghee Park
Summary: This study reports that inexpensive, abundant, and commercially available pine bark has the highest Cr(VI) removal capacity compared to biomass reported elsewhere, making it a promising candidate for the removal of Cr(VI) from wastewater.
Article
Environmental Sciences
Xiaofeng Jiang, Wenjun Long, Teng Xu, Jiayu Liu, Yuling Tang, Wenhua Zhang
Summary: Polyphenols, such as gallic acid (GA) and tannic acid (TA), can effectively convert Cr(VI) to Cr(III) under neutral conditions. However, there are significant differences in the transport, leaching toxicity, and bioavailability of reduced Cr(III) between the two systems. GA leads to poor immobilization of Cr(III) due to the formation of soluble complexes, while TA dominates in the reduction and precipitation of Cr(III), leading to its immobilization in the soil phase. These findings provide new insights into the fate and transport of Cr in soils and have implications for the development of Cr sequestration technology.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Environmental Sciences
Jingjing Shi, William B. McGill, P. Michael Rutherford, Todd W. Whitcombe, Wei Zhang
Summary: In this study, sequential extraction methods were used to analyze the transformations of Cr fractions in soils spiked with Cr(VI) over a 240-day incubation period. The results showed a continuous decrease in available Cr(VI) and an increase in immobile Cr(VI) and Cr(III) over time. Modeling analysis revealed that Cr(VI) reduction and immobilization were occurring concurrently in soils, with different favorable conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Biotechnology & Applied Microbiology
Pooja Sharma, Surendra Pratap Singh, Sheetal Kishor Parakh, Yen Wah Tong
Summary: Industrial effluents are a major source of hexavalent chromium pollution, which is a serious environmental issue due to its persistence and toxicity. Current physico-chemical techniques for its removal are not environmentally friendly, making microbial remediation a potential solution.
Article
Environmental Sciences
Shuai Li, Yiming Xie, Shuguang Jiang, Mingda Yang, Hongxia Lei, Wenzhi Cui, Fayuan Wang
Summary: Appropriate addition of biochar enhances Cr(VI) immobilization and reduces its toxicity and accumulation in sunflower seedlings.
Article
Engineering, Environmental
Hai Liu, Guipeng Tian, Wenyi Wang, Jiachunxiu Zhang, Tianshu Wu, Xinye Ni, Yin-Hu Wu
Summary: The reduction of Cr(VI) to Cr(III) and subsequent precipitation, using a flow-through electrode system (FES), simplifies the treatment processes and offers potential for recollecting Cr resources. The study demonstrates that a multi-cathode FES system can significantly enhance Cr(VI) reduction and Cr(III) precipitation efficiency.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Environmental Sciences
Yating Jiang, Fei Yang, Min Dai, Imran Ali, Xing Shen, Xiaoting Hou, Saleh S. Alhewairini, Changsheng Peng, Iffat Naz
Summary: This review highlights the recent research developments in the remediation of Cr(VI) contamination via microbial immobilization technology (MIT), analyzing the different immobilizing methods, removal mechanisms, and addressing the current challenges and future perspectives.
Article
Engineering, Environmental
Xueming Liu, Hong Deng, Dongye Zhao, Qiulin Yang, Zhihua Zhu
Summary: In this study, a type of Ca-Fe-S microparticles was prepared and tested for the reductive immobilization of Cr(VI) in water and soil. The Ca-Fe-S showed higher removal efficiency of Cr(VI) compared to FeSO4 and CaSx in solution. It was also able to effectively sequester Cr(VI) in soil, with a leachable concentration below the regulatory limit after 730 days of curing.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Juqing Lou, Hui Xu, Hao Jin, Yongqing Cao, Ruyi Wang
Summary: The mechanism of Tubificidae in a sludge reduction system under Cr stress was studied by conducting predation experiments and analyzing enzyme activities. The results showed that Tubificidae had detoxification capabilities and could convert Cr(VI) to Cr(III). These findings suggest that Tubificidae can be considered an effective scavenger of environmental Cr(VI).
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Microbiology
Samar Mustafa, Saba Kabir, Umbreen Shabbir, Rida Batool
Article
Environmental Sciences
Khalid Mahmood, Rida Batool
ENVIRONMENTAL EARTH SCIENCES
(2020)
Article
Nanoscience & Nanotechnology
Sadia Abid, Bushra Uzair, Muhammad Bilal Khan Niazi, Fehmida Fasim, Syeda Asma Bano, Nazia Jamil, Rida Batool, Shamaila Sajjad
Summary: In this study, a polymeric microcarrier system was developed to deliver antifungal drugs to combat multidrug-resistant Candida albicans infections. The synthesized microspheres immobilizing MgO/CuO nanoparticles and nystatin exhibited promising biological activity against MDR strains of C. albicans, showing potential as a controlled release system for prolonged antifungal therapy.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2021)
Article
Pharmacology & Pharmacy
Aniqa Naeem, Rida Batool
Summary: The combination of Exiguobacterium strains and citric acid-processed rice husk showed high efficiency in removing Cr (VI), with citric acid-processed rice husk being the most effective in chromate removal. FTIR spectra demonstrated the involvement of esters, amines, and aliphatic functional groups in Cr (VI) binding, while SEM images showed the damage caused by Cr (VI) on the rice husk surface and the protective effect of bacterial inoculation.
TROPICAL JOURNAL OF PHARMACEUTICAL RESEARCH
(2021)
Article
Engineering, Environmental
Asma Kalsoom, Rida Batool, Nazia Jamil
Summary: This study evaluated the impact of chromate stress on wheat growth by comparing the effects of distilled water and industrial effluent, with and without bacterial inoculation. The results showed that chromate-resistant bacteria significantly promoted wheat growth, especially in terms of seed germination and root and shoot length. Staphylococcus simulans UT8, in particular, showed promising results with increased germination and enhanced plant height, tiller number, and grain yield under chromate stress.
BIOREMEDIATION JOURNAL
(2023)
Article
Polymer Science
Aatikah Tareen, Saira Saeed, Atia Iqbal, Rida Batool, Nazia Jamil
Summary: Polyethylene and Polyester materials are major sources of microplastics pollution and this study evaluated the potential of a bacterial community in a dumped site to degrade them. After screening, two strains of bacteria showed the highest degradation activity and changes in infrared spectra and SEM analysis confirmed their degradation pathways and surface modifications. These findings highlight the importance of soil bacteria in effective plastic waste management.
Article
Infectious Diseases
Syeda Samar Mustafa, Rida Batool, Muhammad Kamran, Hasnain Javed, Nazia Jamil
Summary: This study investigates the occurrence and distribution of antibiotic-resistant ESKAPEE bacteria in nonclinical and clinical wastewaters. It finds that wastewaters are significant carriers of drug-resistant ESKAPEE bacteria and play an important role in their dissemination.
INFECTION AND DRUG RESISTANCE
(2022)
Article
Polymer Science
Naima Khan, Iftikhar Ali, Sumaira Mazhar, Sajida Munir, Rida Batool, Nazia Jamil
Summary: The focus of this study was the production of sustainable polymer PHA using sewage wastewater. It was found that a copolymer could be obtained through the co-culture of two halotolerant bacteria. The copolymer showed biocompatibility and could be used as an extracellular matrix for cell-line growth. Furthermore, it was discovered that volatile fatty acids in sewage wastewater could be used to synthesize the copolymer.
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
Engineering, Biomedical
Kiran Nasir, Rida Batool, Nazia Jamil
Summary: Polyhydroxyalkanoates (PHA) were extracted from haloarchaeal strains and their properties were studied. The strains were screened for Halocin activity and one strain showed confirmed activity. The results demonstrate that PHA can replace synthetic plastics and be more environmentally friendly.
JOURNAL OF BIOMIMETICS BIOMATERIALS AND BIOMEDICAL ENGINEERING
(2022)
Article
Agriculture, Multidisciplinary
Ambreena Javaid, Sajid Rashid Ahmad, Rashid Mahmood, Khalid Mahmood, Abdul Qadir, Rida Batool
Summary: Hudiara drain, originating from India, is an important tributary of river Ravi in Pakistan. The study investigates the role of the drain in the build-up/depletion of metal micronutrients Cu, Fe, Mn, and Zn in surrounding agricultural lands. While Cu and Mn concentrations were higher in some drain water samples, Fe and Zn were found below guidelines in all collected samples. The drain water positively controlled Cu and Zn concentrations in the surrounding agricultural lands, but caused a dilution effect on Fe and Mn build-up.
PAKISTAN JOURNAL OF AGRICULTURAL SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Asma Kalsoom, Rida Batool, Nazia Jamil
Summary: Chromium(VI) contaminated sites have been targeted for studying highly chromate-resistant bacteria, with one strain identified as Staphylococcus simulans showing high tolerance and removal potential for chromate. The bacteria exhibited absorption shifts and adsorption of oxyanions, as well as upregulation of specific genes under chromate exposure, indicating its effectiveness in chromate reclamation of wastewater.
GREEN PROCESSING AND SYNTHESIS
(2021)
Article
Green & Sustainable Science & Technology
Nasir Javaid, Rida Batool, Nazia Jana
JOURNAL OF RENEWABLE MATERIALS
(2019)
Article
Soil Science
Javeria Mushtaq, Rida Batool
SOIL & ENVIRONMENT
(2019)
Article
Ecology
R. Batool, K. Mahmood, S. R. Ahmad, M. A. Naeem
APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH
(2019)