Article
Environmental Sciences
Chenhao Lyu, Yongjie Qin, Zhuqing Zhao, Xinwei Liu
Summary: The bioavailability of selenium in seleniferous soils is influenced by its distribution, with only small proportions found in soluble and exchangeable forms. Selenium primarily exists in organic matter-bound fractions, showing a significant positive correlation with soil organic matter. The use of DGT technology accurately assesses selenium bioavailability in naturally seleniferous soils.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Tianyu Jiang, Tao Yu, Hongbin Qi, Fengyan Li, Zhongfang Yang
Summary: This study found that the application of sulfur and phosphorus can significantly increase the uptake of selenium by pak choi, while high levels of sulfur and phosphorus can also inhibit the absorption of selenium to a certain extent. The bioavailability of selenium in soil is affected by the competitive adsorption of S and P, as well as changes in soil pH.
Article
Environmental Sciences
Xiaoqing Wang, Gianluca Brunetti, Wenjie Tian, Gary Owens, Yang Qu, Chaoxi Jin, Enzo Lombi
Summary: This study evaluated potential practical techniques for chemical immobilization of molybdenum (Mo) contaminated agricultural soils using up to six different amendments from four materials. The results showed that biosolids, water treatment residues, and magnetite were effective in reducing molybdenum extractability and uptake by plants in lightly and moderately contaminated soils.
ENVIRONMENTAL POLLUTION
(2021)
Review
Environmental Sciences
Jessica E. Favorito, Paul R. Grossl, Thomas Zane Davis, Matthew J. Eick, Nathan Hankes
Summary: This article discusses the selenium contamination issues in the Western Phosphate Resource Area of the United States, focusing on the adverse effects of selenium accumulation in soil on vegetation and livestock, as well as the discussion on soil remediation strategies.
Article
Engineering, Environmental
Yuanzhe Ma, Nanchun Zhang, Yanan Li, Haolin Zhao, Fei Zhou, Mingyue Xue, Lihui Lyu, Jing Yang, Yu Ban Man, Fuyong Wu, Dongli Liang
Summary: Lack of understanding of differences in selenium behavior between paddy and dryland soils affects Se biofortification and human health risks. This study found that Se concentration in paddy soil was significantly lower than in dryland soil in Se-rich areas of China. The bioavailability of selenium in rice was lower in Se-rich areas due to higher selenite content. The concentration and availability of selenium in dryland soil were lower than in paddy soil, affecting the biofortification of maize. The study highlights the importance of understanding selenium concentrations and bioavailability in soils for land use decisions.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Pan Ma, Tian Tian, Zhaoyi Dai, Tingyu Shao, Wei Zhang, Mingda Liu
Summary: This study found that aging of soil can decrease the bioavailability of cadmium (Cd) and its toxicity to plants, mainly due to a decrease in ion-exchangeable Cd. Roots are more suitable for indicating the uptake and accumulation of Cd by plants, while shoots can effectively evaluate the toxic effect of Cd stress on plants. Diffusive gradients in thin films (DGT) is more suitable for reflecting Cd bioavailability to plants compared to chemical extraction methods, and it can be used to evaluate stable polluted soil with longer aging time. In the study of the bioavailability of heavy metals in soil, the integrated biomarker response (IBR) can serve as a reliable reference index to contribute to the comprehensive evaluation of metal bioavailability.
Article
Environmental Sciences
Ruyi Yang, Linfeng Luo, Nan Zhao, Fuyu Guo, Meng Zhu, Shuting Zan, Tianao Yu, Fengxiang X. Han, Jingxuan Huang
Summary: Earthworms and their gut bacteria were found to be more effective in immobilizing Cd in seleniferous soil and increasing the Se/Cd ratio in soil. However, soil amendment alone could not ensure the food safety of leaf vegetables.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Environmental Sciences
Xinxin Li, Samantha Huang, M. B. McBride
Summary: The study shows that plant roots play a significant role in modifying the solubility of lead in historically contaminated orchard and lead phosphate-spiked soils. The rhizosphere effect was observed not only for lead, but also for other trace metals such as aluminum, iron, copper, and nickel.
ENVIRONMENTAL POLLUTION
(2021)
Article
Horticulture
Wenyao Shi, Yuzhu Hou, Zezhou Zhang, Xuebin Yin, Xiaohu Zhao, Linxi Yuan
Summary: This study found that the three-step sequential extraction method (aqueous solution extraction-pepsin extraction-trypsin extraction) performed the best in extracting selenium from high selenium-enriched Ganoderma lucidum, with a total selenium extraction rate of 65% and a total selenium enzymatic hydrolysis rate of 40%. The selenium speciation in this high selenium-enriched Ganoderma lucidum was determined. This study provides a reliable and efficient method to evaluate the selenium transformation and safety in high selenium-enriched edible fungi.
Article
Engineering, Environmental
Yun-Sik Lee, Min-Suk Kim, June Wee, Hyun-Gi Min, Jeong-Gyu Kim, Kijong Cho
Summary: The study reveals that arsenic in mine waste poses a threat to soil ecosystems, with the bioavailability of arsenic depending on its chemical fraction and exposure conditions. The mobility fraction is related to the risk to the collembolan community, with high fractions leading to a decrease in abundance, richness, and Shannon index.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2021)
Article
Chemistry, Multidisciplinary
Helena Passos, Brayan Cruz, Nicolas Schaeffer, Carla Patinha, Eduardo Ferreira da Silva, Joao A. P. Coutinho
Summary: It is found that ionic-liquid-based aqueous biphasic systems can be used for selectively recovering metals from copper acid mine drainage effluents by forming stable metal complexes. Additionally, the addition of sodium thiocyanate allows for selective metal extraction, reducing system costs and environmental impact.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Review
Biology
Frank Stephano Mabagala, Marco E. Mng'ong'o
Summary: The application of organic manure and crop residues can have either positive or negative effects on the availability of phosphorus in agricultural soils, depending on the adsorption and mineralization processes of organic matter in the soil, especially in highly weathered tropical soils. The addition of organic matter can increase the release of phosphorus, but it can also reduce the availability of phosphorus and result in environmental loss.
SAUDI JOURNAL OF BIOLOGICAL SCIENCES
(2022)
Article
Environmental Sciences
Yan Qin, Caicheng Huang, Guirong Huang, Hong Li, M. J. I. Shohag, Minghua Gu, Fangke Shen, Dan Lu, Mingfu Zhang, Yanyan Wei
Summary: Deficiencies of selenium (Se) can be remedied by supplying Se-enriched rice, but overconsumption poses a potential risk. This study developed a rat in vivo model to assess the bioavailability of Se from Se-enriched rice. The results showed a positive correlation between the Se bioavailability and the proportion of SeMet in rice.
ENVIRONMENTAL POLLUTION
(2023)
Article
Biochemistry & Molecular Biology
Irene Gomez-Cruz, Maria del Mar Contreras, Inmaculada Romero, Eulogio Castro
Summary: Antioxidants and mannitol were successfully extracted from exhausted olive pomace using ultrasound-assisted water extraction, with optimal conditions determined through response surface methodology. The phenolic profile of the extracts was analyzed by liquid chromatography-UV and mass spectrometry, revealing hydroxytyrosol as the main phenolic compound. Scanning electron microscopy was used to study morphological changes in the cellular structure. Additionally, bioactive triterpenes were extracted from the solid residue, with ultrasound enhancing the extraction process.
Article
Environmental Sciences
Chenhao Lyu, Jiawei Chen, Lei Li, Zhuqing Zhao, Xinwei Liu
Summary: This study investigated the characteristics of Se enrichment in the water-soil-plant system, as well as the dietary Se status of local residents in seleniferous areas. The results showed that Se in well water mainly came from Se-enriched shales and coals, and the mobility of Se in seleniferous soils was relatively low. The concentration of Se in edible parts of crops varied widely, with cereal plants having a higher Se-enrichment ability than tuber plants. The probable dietary Se intake in high-Se areas has decreased in recent years but still exceeds the permissible value. Reducing cereal-derived dietary Se intake is an important strategy to improve the Se nutrition status in high-Se areas.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)