Microbially influenced formation of anhydrite at low temperature

Article Geology

High-resolution facies analysis of a coastal sabkha in the eastern Gulf of Salwa (Qatar): A spatio-temporal reconstruction

Max Engel et al.

Summary: This study reconstructs the facies changes and coastal formation in detail in the sabkhas of Qatar, based on diverse facies types and age estimates. It presents a sequence of coastal evolution spanning thousands of years.

SEDIMENTOLOGY (2022)

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Article Engineering, Environmental

Influential mechanism of water occurrence states of waste-activated sludge: Potential linkage between water-holding capacity and molecular compositions of EPS

Boran Wu et al.

Summary: This study focuses on the variation in molecular compositions of EPS induced by •OH and its effects on the water occurrence states of waste-activated sludge (WAS). The results indicate that hydrophilic functional groups have a greater impact on the water-holding capacity of EPS. It is clarified that selectively removing hydrophilic functional groups is more effective for highly-efficient sludge conditioning approaches than improving •OH production efficiency.

WATER RESEARCH (2022)

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Article Multidisciplinary Sciences

Single step calcium sulfate scale removal at high temperature using tetrapotassium ethylenediaminetetraacetate with potassium carbonate

Mobeen Murtaza et al.

Summary: Calcium sulfate scale is a common problem in oil and gas wells and water injectors. This study successfully removed the scale using a single-step method with potassium carbonate and tetrapotassium ethylenediaminetetraacetate at high temperature. The parameters for optimal dissolution efficiency were identified, and the reaction product was found to be non-corrosive with high stability and minimal corrosion rates at high temperatures.

SCIENTIFIC REPORTS (2022)

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Article Environmental Sciences

Deciphering the impacts of composition of extracellular polymeric substances on sludge dewaterability: An often overlooked role of amino acids

Keke Xiao et al.

Summary: The study found that glycine, serine, and threonine are key amino acids correlated with parameters related to sludge dewaterability. Adding these amino acids to sludge samples deteriorated sludge dewaterability due to high repulsive hydrophilic interaction. The presence of these amino acids led to a predominance of Lewis acid-base interaction among sludge flocs.

CHEMOSPHERE (2021)

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Review Astronomy & Astrophysics

On biosignatures for Mars

Frances Westall et al.

Summary: This work addresses the challenge of identifying traces of life on Mars reliably by emphasizing the need for multiple lines of evidence. Correct interpretation of the geological and mineralogical context is crucial for finding biosignatures. Ongoing and future rover missions will explore promising locations and formations, including the ancient Mars location Oxia Planum.

INTERNATIONAL JOURNAL OF ASTROBIOLOGY (2021)

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Review Geochemistry & Geophysics

Gypsum Precipitation under Saline Conditions: Thermodynamics, Kinetics, Morphology, and Size Distribution

Amit G. Reiss et al.

Summary: Gypsum is a common sulfate mineral found on Earth and Mars, forming primarily from brines. Understanding gypsum formation contributes to natural processes and industrial practices. Factors like ionic strength, brine composition, and temperature play crucial roles in the precipitation of gypsum crystals.

MINERALS (2021)

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Article Chemistry, Multidisciplinary

Systematic laboratory approach to produce Mg-rich carbonates at low temperature

Zulfa Ali Al Disi et al.

Summary: The formation of magnesium-rich carbonates like dolomite is still a puzzle, but various factors such as the presence of organic molecules and the mode of mixing during precipitation experiments have shown significant effects on the resulting mineral phases and magnesium content. These findings provide valuable insights for evaluating dolomite formation models based on natural environments and ancient sedimentary sequences.

RSC ADVANCES (2021)

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Review Geochemistry & Geophysics