Measurement of elements by portable x-ray fluorescence spectrometry for the study of adsorption processes: the case of Pbadsorption on soybean straw biochar. | LitMetric
Instituto Multidisciplinario de Biología Vegetal (IMBIV), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
Published: April 2024
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Article Abstract
This study evaluated the reliability of portable X-ray fluorescence (pXRF) in Pbadsorption kinetics and isotherm experiments using soybean straw biochar. The research aimed to compare pXRF results with those obtained through traditional atomic absorption spectrometry (AAS). Soybean straw biochar, produced at 400 °C, was employed as the adsorbent for Pb. The efficiency of adsorption was assessed using Langmuir and Freundlich models. The kinetics of Pbadsorption was analysed through pseudo-first-order and pseudo-second-order models. The pseudo-second-order model described the kinetics of Pbadsorption on biochar better than the pseudo-first order model. Importantly, the pXRF technique demonstrated comparable results to those of AAS, making it a reliable and resource-efficient method for studying Pbkinetics. The results of the isotherm analyses fit the Langmuir model, indicating a desirable and irreversible adsorption of Pbon biochar. PXRF measurements on biochar allowed simultaneous observations of Pbadsorption and Kand Cadesorption, highlighting ionic exchange as the primary adsorption mechanism. In conclusion, our results showcased the applicability of pXRF for Pbadsorption studies in biochars, offering a valuable alternative to traditional methods. The findings contribute to the understanding of biochar as an effective adsorbent for heavy metals, emphasizing the potential of pXRF for cost-effective and efficient environmental research. In this study, we present a novel and detailed procedure that will allow other researchers to continue their studies on Pbadsorption on biochar or similar matrices, significantly reducing the resources and time used and enabling the simultaneous study of the behavior of other ions participating in the process.
Laboratory of Gastrointestinal Microbiology, National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing, China.
Introduction: This study aimed to examine the effects of fermented rice husk powder feed on growth performance, apparent nutrient digestibility, and rumen microbial communities in fattening Hu sheep.
Methods: Twenty-one male Hu sheep with similar body weights (32.68 ± 1.
White mold, caused by the fungus Sclerotinia sclerotiorum (Lib.) de Bary, is a devastating disease affecting common bean (Phaseolus vulgaris L.) production worldwide.
Key Laboratory of Black Soil Protection and Utilization, Ministry of Agriculture and Rural Affairs, Heilongjiang Academy of Black Soil Conservation and Utilization, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China.
Straw return improves soil carbon pool and dissolved organic matter (DOM) characteristics in black soil. Optimal straw return rate is the key to promoting straw return practices in farmland in Northeast China. The experiment was conducted at the Science and Technology Park of China Grain Storage and Northern Corporation in NenJiang, Heilongjiang Province, straw return at 0 kg hm, 3000 kg hm, 4500 kg hm, and 9000 kg hm.
School of Animal Technology and Innovation, Institute of Agricultural Technology, Suranaree University of Technology, Muang, Nakhon Ratchasima, 30000, Thailand.
The aim of this study was to determine the effect of replacing soybean meal (SBM) with fermented cassava pulp by Saccharomyces cerevisiae (FCSC) in the diet of growing goats. Growing goats were randomly assigned to five dietary treatments according to replicated 5 × 5 Latin square design. Dietary treatments were five levels of replacement SBM to FCSC at 0, 25, 50, 75, and 100% of crude protein in concentrates.
Under the one-season-a-year cropping pattern in Northeast China, continuous cropping is one of the main factors contributing to the degradation of black soil. Previous studies (on maize-soybean, maize-peanut, and maize-wheat intercropping) have shown that intercropping can alleviate this problem. However, it is not known whether intercropping is feasible for maize and rice under dry cultivation, and its effects on yield and soil fertility are unknown.
