Article
Geochemistry & Geophysics
Logan Swaren, Weiduo Hao, Scott Melnyk, Daniel Baker, Yuhao Li, George W. Owttrim, Hongbo Zeng, Murray K. Gingras, Daniel S. Alessi, Kurt O. Konhauser
Summary: This study investigated the cell surface reactivity of freshwater cyanobacterium Synechocystis sp. PCC 6803 at varying ionic strengths and found that the cells demonstrated a stronger affinity for Cd in freshwater environments across different pH ranges. These findings suggest that Synechocystis could play a significant role in trace metal cycling in environments with large salinity gradients, such as estuaries and deltas.
Article
Environmental Sciences
Sreelakshmi Parakkaparambil Kuttan, Anas Abdulaziz, Jasmin Chekidhenkuzhiyil, Devika Raj, Mahesh Mohan, Sujith Athiyanathil
Summary: This study reports the structural characterization, biosynthetic pathway, and potential application of melanin secreted by a sponge-associated bacterium. The melanin showed excellent metal biosorption ability and could potentially be used for removing toxic compounds from water.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Ecology
Jianyou Long, Mingxia Yu, Huaihao Xu, Shuangqiu Huang, Zhu Wang, Xu-Xiang Zhang
Summary: In this study, two cadmium-tolerant endophytic bacteria were used as biosorbents to effectively remove Cd(II) from aqueous solutions. The results showed that they exhibited high biosorption capacity and potential as promising adsorbents for Cd(II) removal. The biosorption process was well-described by Langmuir isotherms and pseudo-second-order kinetics.
Article
Engineering, Environmental
Pawel Staron, Juliusz Kuciakowski, Jaroslaw Chwastowski
Summary: The aim of the study was to investigate the potential of a biocomposite material, consisting of raffia fibers, Lindnera jadinii yeast and Fe3O4 nanoparticles, for removing cadmium ions from water. The biocomposite was characterized using various analytical techniques. The study examined the effect of different factors on the sorption of cadmium ions, and selected appropriate equilibrium and kinetic models. The results showed that the biocomposite exhibited high adsorption capacity for cadmium ions and could be effectively regenerated for multiple cycles, making it a promising material for environmental remediation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
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
Environmental Sciences
Carla Calixta Calva Jimenez, Liliana Valentina Pinedo Fernandez, Cristiano E. Rodrigues Reis
Summary: This study evaluated the effect of amendments on cocoa seedlings and found that the application of lime and charcoal can reduce the migration of cadmium towards the seedlings, and the combination of lime and charcoal can prevent the presence of cadmium in the seedlings.
Article
Environmental Sciences
Si-Yi Liu, Qiang Pu, Tian-Jin Mo, Guixiang Peng, Yan Sun, Yulong Zhang, Jinjin Wang, Yongtao Li, Hui-Juan Xu
Summary: This study screened and investigated phosphate-solubilizing bacteria capable of Cd(II) immobilization to find efficient methods of enhancing phosphorus uptake and reducing cadmium uptake by plants. Bacillus sp. B19 was isolated from cadmium-contaminated soil and showed the ability to solubilize phosphate while immobilizing Cd(II). Factors such as initial pH, contact time, and initial Cd(II) concentration affected the biosorption of Cd(II) by Bacillus sp. B19. The findings also provided insights into the kinetics and mechanisms of Cd(II) biosorption by strain B19 using various techniques such as zeta potential, SEM, and FTIR.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Chemistry, Multidisciplinary
Rui Zhang, Joseph J. Richardson, Anthony F. Masters, Thomas Maschmeyer
Summary: Bioadsorption is a promising technology for removing heavy metal ions from water. Brown seaweed is identified as an appropriate adsorbent due to its abundance, low cost, and efficient removal of various metal ion contaminations. However, the effectiveness of remediation can be affected by factors such as salinity, location, and coexistence of pollutants.
Article
Biotechnology & Applied Microbiology
Maya Kihara, Yoshihiro Ojima, Masayuki Azuma
Summary: In a previous study, a metal-adsorbing yeast with chemically modified phosphate groups (referred to as P-yeast) was developed and shown to effectively extract rare earth elements (REEs) from synthetic seawater and hot spring water. P-yeast exhibited selective adsorption of REEs while suppressing the adsorption of other ions at high concentrations. Furthermore, P-yeast showed promising performance in removing Al3+ and Fe2+ from strongly acidic hot spring water and concentrating REEs up to 19 times with a recovery rate of 37%.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Chemistry, Multidisciplinary
Hannah Namkoong, Erik Biehler, Gon Namkoong, Tarek M. Abdel-Fattah
Summary: This study explores a new method of efficiently removing Pb(II) ions from water by using Undaria pinnatifida to create immobilized beads with sodium alginate and calcium chloride. The resulting biosorbent has a higher adsorption capacity for Pb(II) ions compared to activated carbon, indicating its superior removal capability. The research also suggests that an increase in temperature promotes the biosorption reaction of Pb(II) ions.
Article
Environmental Sciences
Sandhanasamy Devanesan, Mohamad S. AlSalhi
Summary: The study focused on the bioaccumulation of Cd2+ and Zn2+ by Bacillus amyloliquefaciens HM28, which showed significant resistance to these heavy metals. The biosorption of Cd2+ and Zn2+ by the dried bacterium was investigated, with high removal yields observed. The findings suggest the potential of B. amyloliquefaciens HM28 biomass in the bioremediation of Cd2+ and Zn2+ contaminated water.
Article
Food Science & Technology
Wen Li, Yinyuan Chen, Tao Wang
Summary: Lactic acid bacteria strain Weissella viridescens ZY-6 showed potential in removing Cd2+ from aqueous solutions, with its binding capacity influenced by various factors. Cd2+ was found to mainly adsorb on the bacterial cell walls, and ZY-6 treatment effectively removed Cd2+ from vegetable and fruit juices.
Article
Biochemistry & Molecular Biology
Peng Zhang, Li Yuan, Jinyu Zeng, Kui Zou, Bingzhi Liu, Taiping Qing, Bo Feng
Summary: This study isolated 7 Pseudomonas strains and evaluated their alginate production under different environmental conditions. Alginate-biomass hydrogel beads were prepared using these strains and their adsorption performance and mechanism to Pb2+ and Cd2+ were analyzed. The results showed that certain strains had high alginate yield and biomass adsorption capacity, which is significant for alginate recovery from activated sludge and heavy metal wastewater treatment.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Engineering, Chemical
Y. Doruk Aracagok, Ezgi Ogun, Murat Torun, Hasan Akyil, Nilufer Cihangir, Selim Sanin
Summary: This study focused on removing cadmium(II) from aqueous solutions using newly isolated fungus dry mass as an adsorber. The pH of the solution strongly influenced the removal percentage of Cd(II), with the highest removal yield at pH 7. The adsorption process was determined to be endothermic and spontaneous, with a negative standard Gibbs energy change.
DESALINATION AND WATER TREATMENT
(2021)
Article
Biophysics
Xinwei Shi, Qiujie Ling, Zhiling Jiang, Fengmei Pei, Meifen Xin, Weilan Tan, Xuan Chen, Kehui Liu, Jiangming Ma, Fangming Yu, Yi Li
Summary: The contributions of different types of extracellular polymeric substances (EPSs) secreted by Enterobacter sp. to the adsorption of Cd2+ and Pb2+ ions were analyzed. Adsorption equilibrium was reached in approximately 120 minutes with pH 6.0 being the optimal condition. The mechanism of adsorption involved spontaneous chemical processes and ion exchange, and the functional groups involved were mainly polysaccharides.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)