Article
Environmental Sciences
Yi-Zhao Liu, Ri-Dong Fan, Song-Yu Liu, Huan He
Summary: This study explored the activation effect of oxalic acid on bone meal (BM) and developed an oxalic acid-activated bone meal (ABM) for improving heavy metal immobilization efficiency. The results showed that ABM had higher solubility and outperformed BM in terms of immobilizing lead (Pb) and cadmium (Cd). The leaching concentration of Pb from ABM immobilized soils met regulatory limits and was significantly lower than that from BM immobilized soils. After 90 days of curing, ABM also showed better Cd immobilization performance than BM.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Jiang-shan Li, Qiming Wang, Zhen Chen, Qiang Xue, Xin Chen, Yanhu Mu, Chi Sun Poon
Summary: The study demonstrates that a mixture of ISSA and OA can effectively reduce the leachability of lead in soil, but careful design of mix proportions is necessary to avoid excessive leaching of phosphate and zinc.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Guanjie Jiang, Shuming Cao, Shizhang Zheng, Zhangjie Qin, Yupeng Yan, Qiangjian Wu, Lu Wang, Hui Wang, Qin Zhang
Summary: This study investigates the joint effects of oxalic acid-activated phosphate rock (APR) and kaolinite on the removal of Pb(II) from simulated wastewater. The results demonstrate that APR and the mixture of kaolinite and APR can effectively enhance the removal of Pb, with different mechanisms involved. The findings provide scientific evidence for the comprehensive utilization of kaolinite + APR in removing Pb from water and soil.
JOURNAL OF SOILS AND SEDIMENTS
(2022)
Article
Environmental Sciences
Shanmei Qin, Heyun Zhang, Yonghong He, Zhaojin Chen, Lunguang Yao, Hui Han
Summary: Phosphate-solubilizing bacteria can solubilize phosphate and immobilize heavy metals Cd and Pb, thereby inhibiting their absorption by radish. This study provides new bacterial resources and technical approaches for remediation of heavy metal pollution and efficient phosphorus fertilizer use in farmland.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Wei Wei, Xuan Han, Yi Shao, Wenming Xie, Yong Zhang, Yijun Yao, Wei Zhao, Ruiming Han, Shiyin Li, Chunmiao Zheng
Summary: This study investigated the influence of humic acid and oxalic acid on lead immobilization by nanocrystalline hydroxyapatite, and found that the presence of oxalic acid significantly enhanced the immobilization efficiency of lead, while humic acid slightly hindered the process.
Article
Engineering, Environmental
Mohsen Jalali, Mahdi Jalali, Vasileios Antoniadis
Summary: This study investigates the effects of different amendments and low-molecular-weight organic acids on the release of potentially toxic elements (PTEs) from soils. The highest release of PTEs was observed with citric acid, followed by oxalic and malic acids. The addition of poultry manure was found to be the most environmentally friendly amendment. The results highlight the importance of considering cadmium (Cd) in order to prevent environmental pollution.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Iqbal Naeem, Nasir Masood, Veysel Turan, Muhammad Iqbal
Summary: The study found that using MC alone effectively immobilizes Pb in soil and reduces its distribution in plants, while BR alone stimulates soil enzymatic activities and plant growth but is less effective in immobilizing Pb. A 50:50 ratio mixture of BR and MC showed the most promising outcomes, enhancing Pb-IMMi, soil enzymatic activities, plant growth, and reducing Pb concentrations in plants compared to control. Such a combination presents a cost-effective approach for reducing Pb uptake by plants.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Environmental Sciences
Md. Shoffikul Islam, Ziteng Song, Ruili Gao, Qingling Fu, Hongqing Hu
Summary: The use of biochar (BC) for heavy metal immobilization was found to be affected by low concentrations of tartaric acid, which increased immobilization, while higher concentrations of tartaric acid and oxalic acid led to increased mobilization of heavy metals.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Hongde An, Bo Xie, Meng Ren, Zhuang Li, Wenchao Li, Yu Liu, Yuanzhuang Xu, Duqiang Luo
Summary: In this study, a self-activated nuclease formulation based on squaric acid-based MOFs was developed for efficient enzyme activation and protection. The MOFs improved the stability of the enzymes and released them during catalysis, resulting in high activity and resistance to harsh environments. This formulation also showed enhanced activity and stabilities for other nucleases.
ACS MATERIALS LETTERS
(2023)
Article
Environmental Sciences
Jinlong Peng, Fenglian Fu, Lin Zhang, Bing Tang, Xiangdan Zhang
Summary: This study investigated the effect of malic acid and phosphate on the transformation of ferrihydrite-lead co-precipitates (Fh-Pb) and the subsequent fate of lead(II) during a 10-day aging process. The results showed that both malic acid and phosphate delayed the Fh-Pb transformation and prevented the release of lead(II) back into the solution. Additionally, malic acid and phosphate improved the incorporation of lead(II) into secondary minerals. This study provides insights into the immobilization of lead(II) during ferrihydrite-lead aging.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Zhongwu Lan
Summary: Authigenic xenotime and monazite are common in siliciclastic sedimentary rocks and can be used to determine the depositional age. Their small size and complex chemical compositions require advanced imaging and dating techniques. Integrated petrographic and geochemical studies can help distinguish their different sources.
EARTH-SCIENCE REVIEWS
(2022)
Article
Chemistry, Physical
Urszula Ryszko, Piotr Rusek, Dorota Kolodynska
Summary: This study discusses the chemical and mineralogical compositions of phosphate rocks from various locations. These rocks have high phosphorus content, making them suitable for the production of phosphoric acid and fertilizers.
Article
Optics
Gui-Bing Hong, Shih-Cheng Hu, Angus Shiue, Shao-Kang Chen, Graham Leggett
Summary: Coal-based activated carbon modified by oxalic acid shows increased surface area and roughness, leading to improved adsorption of IPA. The breakthrough time of modified coal-based AC is longer.
Article
Environmental Sciences
Xiaohua Shu, Minghao Yang, Haiyang Lin, Qian Zhang, Lishan Zhang, Jie Liu, Xuehong Zhang, Fujing Pan, Lizhen Xu
Summary: Low-molecular-weight organic acids (LMWOAs) in soil can affect the transport and behavior of microplastics (MPs) by interacting with mineral interfaces. This study investigated the effect of oxalic acid on mineral interfaces and its role in stabilizing MPs. The results showed that oxalic acid increased the stability of MPs on minerals and created new adsorption pathways, depending on the mineral bifunctionality induced by oxalic acid. In the presence of oxalic acid, the stability of hydrophilic and hydrophobic MPs on different minerals was significantly improved. Overall, these findings provide important insights into the environmental behavior of emerging pollutants and the role of organic acids in mediating their interactions with minerals.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Naijing Bu, Xiaomeng Liu, Tianzhen Li, Rong Li, Qiang Zhen
Summary: In this study, the adsorption capacity of activated carbon for organic pollutants was enhanced through oxalic acid hydrothermal modification, which not only changed the pore structure but also the surface functional groups of the activated carbon. The adsorption process followed the diffusion-controlled model, with internal particle diffusion as the rate-controlling step.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)