Article
Environmental Sciences
Guojuan Qu, Peng Jia, Tao Zhang, Zongchen Li, Changxun Chen, Yaping Zhao
Summary: Zirconium oxide with high lattice defects, t-ZrO2, synthesized by regulating Zr-MOF UiO-66, demonstrated ultrahigh adsorption capacity towards arsenic, outperforming existing counterparts in literature. The adsorption of both As(III) and As(V) is facilitated by the mesoporous structure and lattice defect of t-ZrO2, with favorable pseudo-second-order kinetics over a wide pH range. The formation of Zr-O-As bonds on t-ZrO2 was revealed to be the main mechanism for arsenic capture, offering a new strategy for designing high-performance Zr-MOF-derived adsorbents.
Article
Chemistry, Physical
Dongxue Liu, Ye Li, Chang Liu, Bolin Li
Summary: Bimetal oxide is commonly used for defluorination, and a novel lanthanum-zirconium phosphate was successfully synthesized using CTAB as a surfactant to remove fluoride from groundwater. The lanthanum-zirconium phosphate showed a high specific surface area and a large pore size, with a maximum fluoride adsorption capacity ten times higher than that of mesostructured zirconium phosphate. The adsorption mechanism of fluoride by the lanthanum-zirconium phosphate was discussed using XPS, NMR, and FTIR analysis. Lanthanum-zirconium phosphate is important not only in the research and development of bimetal oxides but also in the treatment of groundwater for fluoride removal.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Environmental Sciences
Ramona Balint, Mattia Bartoli, Pravin Jagdale, Alberto Tagliaferro, Abdul Samad Memon, Massimo Rovere, Maria Martin
Summary: This study presents solid-state synthesized defective Bi2O3 with Bi(V) sites as effective and recyclable arsenic adsorbent materials. The Bi2O3 was extensively characterized and structure-related adsorption processes were reported. Both As(V) and As(III) species-adsorption processes were investigated under various concentrations, pH values, and times, along with testing the effect of several competing ions and the recyclability of the adsorbent.
Article
Engineering, Chemical
Somakraj Banerjee, Ranjana Das, Chiranjib Bhattacharjee
Summary: It has been discovered that adsorption is an efficient method for removing arsenic contamination in water. Mesoporous Mg-Al-Ti ternary oxide composite nanoparticles with varying compositions have been synthesized via a low-cost, scalable, evaporation-induced self-assembly technique. These nanoparticles exhibit high adsorption capacities for arsenic and exceptional performance in a wide pH range, making them a promising candidate for arsenic remediation from water.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Monika Szufla, Jorge A. R. Navarro, Kinga Gora-Marek, Dariusz Matoga
Summary: Intentional defects introduced into solid materials provide opportunities for controlling and tuning their diverse physicochemical properties. In this study, we successfully introduced missing-linker defects into a sulfonated proton conductive 2D zirconium-based MOF (JUK-14) using a facile post-synthetic approach. We compared the stability and performance of the resulting materials, including proton conductivity and adsorption of N-2, CO2, and H2O molecules. We also discussed the presence of interlayer counterions and their effect on the properties and stability, and the potential application of our defect engineering approach to other layered MOFs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Hao Zhu, Wenhui Lin, Liwen Fan
Summary: This study focuses on the hydrothermal synthesis of magnetically activated carbon and its efficacy in As(III) adsorption. The adsorbents demonstrated high As(III) removal efficiency with a uniform pore distribution. The kinetics and thermodynamics of adsorption were rigorously analyzed, and the Langmuir model was found to be the most suitable for describing the adsorption process.
Article
Engineering, Environmental
Rennan Felix da Silva Barbosa, Noelle Cardoso Zanini, Daniella Regina Mulinari, Derval dos Santos Rosa
Summary: This study obtains macro and nanoscale cellulose samples from eucalyptus by-products through ball milling and modification processes, and characterizes their structural features and adsorption performance. The results show that the nanoscale structure has a higher modification degree and thermal stability, and exhibits better chromium adsorption capacity.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Review
Chemistry, Multidisciplinary
Diego R. Joya-Cardenas, Juliana P. Rodriguez-Caicedo, Armando Gallegos-Munoz, Gabriela A. Zanor, Maya S. Caycedo-Garcia, Cesar E. Damian-Ascencio, Adriana Saldana-Robles
Summary: Water contamination is a growing problem worldwide, with pollutants such as arsenic, fluoride, and chromium being major concerns. Adsorption using graphene oxide (GO) has become a popular method for removing these contaminants due to its high adsorption capacity and low cost. This review focuses on the advancements and developments of GO-based materials for the adsorption of various contaminants, including arsenite, arsenate, fluoride, and hexavalent chromium. The synthesis techniques and their relationship with adsorption capacities and other physical properties are extensively discussed, highlighting the importance of the sol-gel synthesis method.
Article
Engineering, Environmental
Juanjuan Zhou, Yanwei Liu, Bingqian Li, Wenyun Huang, Junhao Qin, Huashou Li, Guikui Chen
Summary: Hydrous zirconium oxide modified biochar (BC-Zr) was synthesized and found to have superior arsenic immobilization potential in both simulated water and real soil leachate. It also promoted the growth of cowpea and the development of the root nodule system.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Md Hasan Zahir, Kashif Irshad, Mohammad Mizanur Rahman, M. Nasiruzzaman Shaikh, Mohammad Mominur Rahman
Summary: The synthesis of calcium-yttrium carbonate layered double hydroxide nanosheets with exceptional affinity and selectivity for toxic metal ions has been successfully achieved, demonstrating rapid and selective adsorption of various toxic metal ions and metalloid arsenic from aqueous solutions. These materials show excellent chemical stability while maintaining their lamellar shapes even under acidic conditions.
Article
Chemistry, Inorganic & Nuclear
Vetiga Somjit, Phakawan Thinsoongnoen, Taweesak Pila, Bundet Boekfa, Suttipong Wannapaiboon, Kanokwan Kongpatpanich
Summary: Zirconium clusters of UiO-66 have been hydroxylated with NaOH to generate strong binding sites for As(III) species in wastewater treatment, providing high adsorption capacity over a wide range of pH with significantly enhanced uptake.
INORGANIC CHEMISTRY
(2022)
Article
Environmental Sciences
Ketao Yan, Britta Planer-Friedrich, Philipp Victor Thorben Knobloch, Qinghai Guo, Luxia Wang, Qian Zhao
Summary: This study investigated the adsorption kinetics of different arsenic (As) species onto geothermal sediments. The results showed that sediments with high levels of sedimentary organic matter (SOM) and iron (Fe) exhibited considerable As adsorption capacity. The adsorption rates of different As species decreased in the order of tetrathioarsenate (TetraTA) > monothioarsenate (MTA) > arsenate [iAs(V)] > monomethyl arsenate (MMA) > dimethyl arsenate (DMA) > arsenite [iAs(III)] > monomethyl monothioarsenate (MMMTA) > dimethyl monothioarsenate (DMMTA) > dimethyl dithioarsenate (DMDTA). Thiolation of inorganic As did not necessarily increase its mobility, but the formation of methylated oxyarsenates and their further thiolation endowed geothermal As with strong migration ability.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Biotechnology & Applied Microbiology
Hung C. Duong, Lan T. T. Tran, Minh T. Vu, Diep Nguyen, Nga T. Tran, Long D. Nghiem
Summary: This study highlights the challenges in providing financially sustainable potable water in arsenic-affected areas, with a notable deficiency in the current practice over-focusing on household-scale treatment systems without adequate maintenance, monitoring, and cost-benefit analysis. The lack of accurate and reliable arsenic analysis, along with limited data on maintenance and compliance monitoring costs, contribute to significant discrepancies in the performance of small-scale treatment systems. Opportunities exist to improve performance reliability and reduce water treatment costs through digital transformation in the water sector.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Chemistry, Physical
Qian Wu, Jinfan Chen, Yiming Ren, Yunfeng Du, Shaofei Wang, Dezhi Zhang, Junsheng Liao, Xiangke Wang
Summary: In this study, the interface interactions between phosphate and zirconium oxide surface were investigated using in-situ attenuated-total-reflection Fourier transformation infrared spectroscopy (ATR-FTIR) and density functional theory (DFT) calculations. The results showed that phosphate forms different complexes on the surface depending on the pH conditions, and the stability follows the order: mono-protonated bidentate (MB) > non-protonated bidentate (NB) > bi-protonated monodentate (BM).
APPLIED SURFACE SCIENCE
(2022)
Article
Environmental Sciences
Seyed Vahid Mousavi, Parham Joolaei Ahranjani, Sara Farshineh Saei, Naser Mehrdadi, Gholamreza Nabi Bidhendi, Binta Hadi Jume, Shahabaldin Rezania, Amin Mojiri
Summary: The present study developed and evaluated nano-adsorbents based on zirconium oxide and graphene oxide as a novel adsorbent for the efficient removal of ammonia from industrial effluents. Various parameters were optimized and kinetic models and adsorption isotherms were used to verify the efficiency of the adsorbent.