Article
Soil Science
Thomas Ohnemus, Oliver Spott, Enrico Thiel
Summary: A process-driven model was developed to estimate the susceptibility of cropland soils to release ammonia after urea application, revealing that CEC, pH, and SOC are important factors influencing ammonia loss potential. Spatial distribution analysis showed that cropland soils in northern and eastern Germany are more susceptible to ammonia release due to urea fertilization.
Article
Environmental Sciences
Xiaoying Cui, Peng Mao, Shuo Sun, Rong Huang, Yingxu Fan, Yongxing Li, Yingwen Li, Ping Zhuang, Zhian Li
Summary: The availability of Cd and CEC in soil are important factors affecting plant growth and Cd uptake. A deficiency of Ca and Mg in low CEC soil leads to insufficient plant growth and Cd detoxification, while an increase in Ca and Mg in high CEC soil promotes plant photosynthesis and tolerance to Cd stress.
Article
Agronomy
Carlos Henrique Fornasari, Yessica Jazmin Aquino Garcia, Felippe Martins Damaceno, Luiz Antonio Zanao Junior
Summary: The substitution of the 0.5 mol.L-1 calcium acetate method for pH SMP is feasible and eliminates operational and economic limitations. Regionalization of soil data is necessary for reliable estimation of acidity potential. The best equation for estimating potential acidity in West Paraguay soils was determined through regression analysis.
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
(2023)
Article
Agronomy
Amita Jain, Robert W. Taylor
Summary: The purpose of this study was to compare CEC values obtained by direct measurement and by summing EBCs in calcareous soils. It was found that the summation method based on EBCs extraction with 1 M ammonium acetate at pH 8.2 is an accurate choice for estimating CEC in calcareous soils.
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
(2023)
Article
Soil Science
Fulai Yan, Markus Tuller, Lis de Jonge, Per Moldrup, Emmanuel Arthur
Summary: The soil specific surface area (SSA) is an important variable, but traditional measurement methods are difficult and time-consuming. Regression models that estimate SSA from hygroscopic water content (wh) at different relative humidity values were proposed and compared to other models. The study found that sample-specific wh regression models accurately estimated SSA, with better performance than models based on other soil properties. The study confirms the impact of clay mineralogy on model performance.
Article
Soil Science
Katalin Juhos, Balazs Madarasz, Zsolt Kotroczo, Aron Beni, Marianna Makadi, Istvan Fekete
Summary: The long-term detritus manipulation study in a Central-European forest site revealed significant impact of detritus input treatments on soil organic carbon and almost all soil physicochemical indicators within the upper 15 cm layer. This site is unique due to its high clay content and dry climate, suggesting the importance of potential cation exchange capacity and base saturation in predicting carbon sequestration mechanisms. It is recommended to include these parameters in current soil organic carbon models.
Article
Food Science & Technology
Jian-Long Han, Lei Zhang, Ping-Ping Zhou, Jiao-Jiao Xu, Xiao-Dong Pan, Pei Cao, Xiao-Min Xu
Summary: An analytical method using liquid chromatography-tandem mass spectrometry (LC-MS/MS) with cation exchange solid phase extraction (SPE) clean-up was developed to detect both trace contamination and high levels of Tetrodotoxin (TTX) in gastropods. The method showed a limit of detection (LOD) of 0.5 μg/kg in the sample matrix. TTX contamination and analogues were first reported in Neverita didyma (N. didyma) collected from Zhejiang province, China, with a detection rate of 34.2% and an average concentration of 23.1 μg/kg.
Article
Chemistry, Physical
Stephan Kaufhold, Reiner Dohrmann, Jens Groeger-Trampe
Summary: The study investigates the liberation of naturally present fixed cations in pure dioctahedral smectites. The results show that hydrothermal treatment can render at least a part of the fixed cations exchangeable. However, this liberation is accompanied by a decrease in cation exchange capacity, which may be due to smectite dissolution. The fixed cations are strongly bound and can only be liberated if the smectite structure is affected.
APPLIED CLAY SCIENCE
(2023)
Article
Engineering, Civil
Yu Zhong, Annan Zhou, Jiapei Du, Jidong Teng, Shui-long Shen
Summary: This study modifies the classical KC equation to consider the influence of clay surface characteristics and nanoscale pores on the saturated hydraulic conductivity in clayey soils. Through molecular dynamics modeling, a specific function is proposed to quantify the adsorbed proportion, and the modified equation is validated with experimental data, showing high accuracy.
JOURNAL OF HYDROLOGY
(2023)
Article
Instruments & Instrumentation
J. A. Ramirez-Rincon, Manuel Palencia, Enrique M. Combatt
Summary: Soils play a crucial role in supporting plant growth and various economic activities. Optical spectroscopy, specifically the Functionally-enhanced derivative spectroscopy (FEDS and FEDS0) analyzed in this study, is a reliable technique that utilizes mathematical and statistical tools to extract hidden information from optical signals and determine the physicochemical properties of organic and inorganic species in agricultural soils. The results demonstrate a correlation between the FEDS0 spectra and the chemical properties related to nutritional and fertility state of the soil samples, indicating the potential of optical analysis for assessing soil quality.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Gampanart Sukmak, Patimapon Sukmak, Suksun Horpibulsuk, Arul Arulrajah, Jitwadee Horpibulsuk
Summary: This research studied the role of clay minerals in the strength development of cement stabilized clays. The study found that clay mineral, water content, and cement content were the main factors influencing the strength development. The ratio of total soil water to cement content was found to reflect the effect of water content and cement content on clay strength. A generalized strength model was developed to predict the strength development of cement stabilized clays.
APPLIED CLAY SCIENCE
(2023)
Article
Environmental Sciences
Simon Weldon, Bert van der Veen, Eva Farkas, Nazli Pelin Kocaturk-Schumacher, Alba Dieguez-Alonso, Alice Budai, Daniel Rasse
Summary: This study conducted a quantitative analysis of the sources of variability in NH4+ sorption to biochar and identified which biochar traits are more favorable for high sorption capacity. The results showed that unmodified biochar has lower sorption capacity for NH4+ than previously reported, and activation can improve sorption capacity but to a limited extent. Methodology, such as pH control and ash removal, significantly affected sorption estimates.
Article
Agricultural Engineering
Junguo He, Heliang Pang, Xinlei Pan, Yanshi Zheng, Ling Wang, Jie Xu, Lin Li, Zhongsen Yan
Summary: The study proposed a cation-regulation strategy to enhance anaerobic fermentation of waste activated sludge, resulting in significant release of short-chain fatty acids. This approach can promote sludge degradation, disrupt extracellular polymeric substances, and facilitate sludge disposal and utilization.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agronomy
Xinlin Zhao, Shuaishuai Gao, Dianjun Lu, Xiaoqin Chen, Wenqiang Feng, Yong Wang, Shimin Zhao, Huoyan Wang
Summary: Soil is the primary source of potassium for plants, and the soil potassium-holding capacity (SKHC) is mainly determined by the nonexchangeable sites of soil clay minerals. Increasing soil organic matter (SOM) content to enhance cation exchange capacity (CEC) can effectively improve SKHC, but it is a slow process.
Article
Environmental Sciences
Qi Zhou, Xuguang Jiang, Qili Qiu, Yimeng Zhao, Ling Long
Summary: This study focuses on the fabrication of zeolite from municipal solid waste incineration fly ash (MSWI FA) using microwave-assisted hydrothermal treatment. It systematically analyzes the effects of various factors on the crystallization of zeolite from MSWI FA. The results demonstrate that zeolite with high crystallinity can be successfully synthesized using magnetic stirring and microwave-assisted hydrothermal treatment. Additionally, the synthetic zeolite exhibits excellent adsorption capacity for heavy metals and dyes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
