The adsorption of three heavy metal ions by pine bark was studied. The study was divided into two parts; single component adsorption of the metals Cu2+, Cd2+ and Ni2+ and bisolute adsorption of the three binary systems Cu2+-Cd2+, Cu2+-Ni2+ and Cd2+-Ni2+. Extended Langmuir model, extended Freundlich model. Sips model and ideal adsorption solution theory (IAST) models were used to predict the equilibrium uptake for Cu2+, Cd2+ and Ni2+ in the binary diluted solutions using the single adsorption constants. The experimental data of single isotherm adsorption process were found to follow Langmuir isotherm model with less accuracy than Freundlich and Sips models. Whereas, the predictions of bisolute adsorption isotherms of the mentioned three systems, Cu2+-Cd2+, Cu2+-Ni2+ and Cd2+-Ni2+, showed good agreement with experimental data when using Extended-Langmuir, Extended-Freundlich and IAST. However, the only good fit of the Sips model was with the Cu2+-Cd2+ system.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s0045-6535(99)00497-x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Ecological and Biological Studies of Two Larval Parasitoids on Two Vectors of the Pinewood Nematode in South Korea.
Insects
November 2024
Korea National Arboretum, Pocheon-si 11186, Gyeonggi-do, Republic of Korea.
Pine wilt disease, caused by the pinewood nematode, affects , Siebold and Zucc., and Parl. in South Korea.
View Article and Find Full Text PDFComparison of Multiple NIR Instruments for the Quantitative Evaluation of Grape Seed and Other Polyphenolic Extracts with High Chemical Similarities.
Foods
December 2024
Department of Food Measurement and Process Control, Institute of Food Science and Technology, Hungarian University of Agriculture and Life Sciences, 1118 Budapest, Hungary.
Grape seed extract (GSE), one of the world's bestselling dietary supplements, is prone to frequent adulteration with chemically similar compounds. These frauds can go unnoticed within the supply chain due to the use of unspecific standard analytical methods for quality control. This research aims to develop a near-infrared spectroscopy (NIRS) method for the rapid and non-destructive quantitative evaluation of GSE powder in the presence of multiple additives.
View Article and Find Full Text PDFPilot-scale adsorption of pharmaceuticals from municipal wastewater effluent using low-cost magnetite-pine bark: regeneration/enumeration of viable bacteria with a study on their biotoxicity.
Environ Res
January 2025
Chemical Process Engineering, P.O. Box 4300, FIN-90014 University of Oulu, Oulu, Finland.
A low-cost and renewable magnetite-pine bark (MPB) sorbent was evaluated in continuous-flow systems for the removal of various pharmaceuticals from municipal wastewater effluent following membrane bioreactor (MBR) treatment. A 33-day small-scale column test (bed volume: 791 cm) was conducted using duplicate columns of biochar (BC, Novocarbo) and activated carbon (AC, ColorSorb) as reference for two columns of BC and MPB in order to compare the efficiency of AC and MPB. After the small-scale column test, the pharmaceutical concentrations were generally below the detection limit.
View Article and Find Full Text PDFCorrelation between Antioxidant Capacity and Phenolic Compounds of Korean Red Pine (Pinus densiflora Sieb. et Zucc.) Bark Fractions under In Vitro Gastrointestinal Digestive Conditions.
Plant Foods Hum Nutr
January 2025
Department of Food Science and Biotechnology, Kyung Hee University, Yongin, 17104, Republic of Korea.
Article Synopsis
- The study examined how the antioxidant capacities of Korean red pine bark are affected by digestion, finding significant changes in phenolic compounds during the process.
- Gastric digestion increased key compounds like procyanidin B1 and catechin, but most were degraded in the intestines, highlighting a focus on protocatechuic acid.
- The results suggest taxifolin as a key phenolic compound contributing to antioxidant effects, indicating potential for RPB as a natural antioxidant in dietary supplements.
Fire in the tree: The origin and distribution of fire-adapted traits within conifers and their influence on speciation rates across the conifer phylogeny.
Am J Bot
January 2025
Department of Biology, University of Idaho, Moscow, 83844, Idaho, USA.
Premise: Considering rapidly changing fire regimes due to anthropogenic disturbances to climate and fuel loads, it is crucial to understand the underpinnings driving fire-adapted trait evolution. Among the oldest lineages affected by fire is Coniferae. This lineage occupies a variety of fire prone and non-fire prone habitats across all hemispheres and has four fire-adapted traits: (1) thick bark; (2) serotiny; (3) seedling grass stage; and (4) resprouting ability.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!