Novel methods to extract flavanones and xanthones from …
A recovery above 80% was obtained for macluraxanthone using the sea sand extraction procedure. Statistical treatment, ANOVA-single factor, was used to evaluate the different extraction procedures, and homogenization of plant material with sand followed by elution with dichloromethane provided the most efficient and rapid …
Molecules | Free Full-Text | Combination of Sea Sand Disruption Method
This paper presents a very simple method of CQA isolation using the sea sand disruption method with subsequent purification of the extract using the ion-pair solid-phase extraction process, followed by HPLC–DAD detection. ... Most plant analysis procedures rely on high-temperature liquid extraction methods, such as extraction via a Soxhlet ...
Sand extraction: the biggest resource crisis you've …
How much sand is extracted from the ocean? We really don't know. There is only very limited monitoring of how much sand is extracted from where and by whom. What we can see is that as land …
1.16: Methods for Separating Mixtures
The evaporation method is suitable to separate a soluble solid from a liquid. In many parts of the world, table salt is obtained from the evaporation of sea water. The heat for the process comes from the sun. Figure (PageIndex{3}): Once the sea water in these evaporation ponds has evaporated, the salt can be harvested.
Application of Sea Sand Disruption Method for HPLC Determination …
This study deals with the sea sand disruption method (SSDM) in sample preparation for chromatographic analysis of quercetin in different plants. Several SSDM variables were tested in relation to ...
Evaluating sediment and water sampling methods for the …
Patterns of relative cluster abundance resolved by eDNA metabarcoding of deep-sea sediment (brown) and aboveground water (blue), using two sampling methods for both sample types, and using four ...
How to eliminate the formation of chlorogenic acids …
Experiments performed on different plants (black elder, hawthorn, nettle, yerba maté, St John's wort and green coffee) demonstrate that the most appropriate method for the estimation of CQAs/CQAs derivatives is sea sand disruption method (SSDM) because it does not induce any transformation and/or degradation processes in the analyzed …
Extraction of microplastic from marine sediments: A
The extraction method included a preliminary cleaning step, carried out by eluting the sample with methanol at a temperature of 100 °C and 100 bar pressure. ... Recoveries obtained by applying the density separation method to calcinated sea sand samples spiked with different size range microplastic resulted in the range 91–77%. …
Molecules | Free Full-Text | Combination of Sea Sand …
This paper presents a very simple method of CQA isolation using the sea sand disruption method with subsequent purification of the extract using the ion-pair …
Desorption behavior and mechanism of chloride ions in fresh …
The three types of sea sand were tested according to the "Standard for Technical Requirements and Test Method of Sand and Crushed Stone (or Gravel) for Ordinary Concrete" (JGJ52–2006) [31]. The chloride-ion content of S I, S II, and S III was 0.0441%, 0.0107%, and 0.0210% of the sea sand mass respectively.
Relevance of the Sea Sand Disruption Method …
Sea Sand Disruption Method (SSDM) is a simple and cheap sample-preparation procedure allowing the reduction of organic solvent consumption, exclusion of sample …
Impact of sand extraction from the bottom of the southern Baltic Sea …
1. Introduction. Sand and gravel resources in the Polish Exclusive Economic Zone of the Baltic Sea are already subject to mining procedures. Artificial beach nourishment with sand from the sea bottom is the basic method of coastal defence proposed by the strategy of coastal protection (Cieślak 2001), which has been …
Sand Extraction
Offshore sand and gravel extraction involves the abstraction of sediments from a bed which is always covered with seawater. This activity started in the early 20th century (in the mid-1920s, in the United Kingdom), but did not reach a significant scale until the …
Coasts and sea life facing major threat due to …
Marine Sand Watch, a platform developed by UN Environment Programme ( UNEP )'s analytical centre, GRID-Geneva, uses artificial intelligence and automatic …
Marine Sand Extraction
Marine sand extraction is the process of removing sand from the seabed or the coastal zone for various purposes, such as construction, land reclamation, beach nourishment, or mining. Process: Dredging: Dredging is the most common method of marine sand extraction. It involves using a vessel equipped with a suction pipe or a …
Production of Seaweed Extracts by Biological and Chemical Methods
In addition, a review of the different pretreatment methods of the biomass before extraction process is shown. The advantages and disadvantages of the various methods of algal extracts production are discussed. Algae are known to produce a variety of bioactive compounds (e.g., polysaccharides, phenolic compounds, proteins, lipids, …
UNEP Marine Sand Watch reveals massive extraction …
Sand extraction puts coastal and seabed ecosystems at risk, including marine biodiversity affected by water turbidity and changes in nutrient availability …
(PDF) Offshore Sand and Gravel Mining
Offshore sand and gravel extraction involves the. abstraction of sediments from a bed which is always. covered with seawater. This activity started in the. early twentieth century (in the mid ...
Combination of Sea Sand Disruption Method and …
In it was shown that the sea sand disruption method (SSDM), also known as the matrix solid-phase dispersion (MSPD) method, is the most appropriate …
Techniques for extraction and isolation of natural …
Extraction methods include solvent extraction, distillation method, pressing and sublimation according to the extraction principle. Solvent extraction is the most widely used method. The extraction of natural products progresses through the following stages: (1) the solvent penetrates into the solid matrix; (2) the solute dissolves …
A solution of sea sand as a sustainable fine aggregate
River sand is currently the main sand used for construction, but the extraction of river sand as fine aggregate has adverse effects on river ecosystems, navigation, and flood control [].Now we should look for the new aggregates which are more environmentally friendly [].Recently, a number of new methods have been developed for …
A solution of sea sand as a sustainable fine …
Introduction. River sand is currently the main sand used for construction, but the extraction of river sand as fine aggregate has adverse effects on river ecosystems, …
Analysis of phthalic acid esters in sea water and sea sand …
In this case, LOQs of the method were in the range 0.020–4.0 ng/g, which are also comparable to those achieved in other works previously published, in which PAEs have been analysed in sea sand and sea sediment using other extraction procedures [40], [41], [42]. 3.3. Analysis of different sea water and sea sand samples
A small-scale, portable method for extracting
Here we have presented a method to extract microplastics from sediments using a specially constructed Sediment-Microplastic Isolation (SMI) unit, in combination with zinc chloride solution (1.5 g cm −3 ), able to extract microplastics from sediments with a mean recovery rate of 95.8% in a single step.
The Hidden Environmental Toll of Mining the World's Sand
Sand mining concessions in national parks and internationally recognized wetlands were killing mangroves and sea grasses that were home to Irrawaddy dolphins, green turtles, and hairy-nosed otters, one of the world's rarest mammals. Sand and gravel are mined on a huge scale around the world. But few global data are collected on this …
(PDF) Combination of Sea Sand Disruption …
using the sea sand disruption method with subsequent purification of the extract using the ion-pair solid-phase extraction process, followed by HPLC–DAD detection. It was found that control of the
A Complete Guide to Extraction Methods of Microplastics …
To date, various methods, ranging from one-step extraction to complex methods based on the oleophilic, electrophilic, or magnetic properties, have been developed. The extraction of MPs from soils is more complex than from sediments and sand, owing to the heterogeneous nature of the soil, and the requirements for the …
Protein extraction from C. elegans using sea …
The method is fast and high-quality extracts can be obtained in an Eppendorf tube for protein gel and RNA extractions. If desired, the sand can be separated from the extract and the clean …
Antioxidant and Anticancer Activities of Sand Sea Cucumber …
The highest extraction yield of sea cucumber H. scabra (3.9%) was obtained using dried H. scabra at 60 o C. The highest antioxidant activity was found in fresh H. scabra extract at 60°C with an IC 50 value of 629.89 ± 0.15 µg/mL using the ABTS method, and the highest antioxidant activity by DPPH method was found in dried H. scabra extract at ...
2.10: Separating Mixtures
The evaporation method is suitable to separate a soluble solid from a liquid. In many parts of the world, table salt is obtained from the evaporation of sea water. The heat for the process comes from the sun. Figure (PageIndex{3}): Once the sea water in these evaporation ponds has evaporated, the salt can be harvested.