Treatment of fracturing fluid waste by Fenton reaction using transition metal complexes catalyzes oxidation of hydroxypropyl guar gum at high pH

Environmental Chemistry Letters - Hydroxypropyl guar gum (HPGG), polyacrylamide (PAM) and carboxymethyl cellulose (CMC) are widely used as thickeners in...     

Seasonal variation in mineralization rates (C-N-P-Si) of mussel Mytilus edulis biodeposits

To determine seasonal variability in mineralization dynamics of mussel biodeposits, we applied a multiple-element approach measuring mineralization rates of carbon (C), nitrogen (N), phosphorus (P) and silicate (Si) during three periods (March, August and November). The results of this study showed that mineralization rates vary between seasons and between elements and that mineralization dynamics were influenced by both temperature and biodeposit nutrient composition. Mineralization rates were 3.2 ± 0.4 mmol C, 0.17 ± 0.04 mmol N, 0.06 ± 0.02 mmol P and 3.91 ± 3.75 mmol Si per gram biodeposit (DW) per day, which represented 24 % of the particulate organic C and 17 % of the particulate organic N in mussel biodeposits. Seasonal variability was largest for Si mineralization with 60–80-fold higher rates measured in March compared to August and November. This difference is most likely related to the difference in biodeposit nutrient composition. It was furthermore shown that the labile fraction of biodeposits became mineralized after, respectively, 18, 9 and 13 days during the experimental periods in March, August and November. This indicates that temperature enhances biodeposit decomposition with approximately 2–3 times faster turnover at a 10 °C temperature interval (Q ₁₀ ).     

Synthesis and application of titanium dioxide photocatalysis for energy,decontamination and viral disinfection: a review

Environmental Chemistry Letters - Global pollution is calling for advanced methods to remove contaminants from water and wastewater, such as TiO2-assisted photocatalysis.  The...     

Metallic and bimetallic phosphides-based nanomaterials for photocatalytic hydrogen production and water detoxification: a review

Environmental Chemistry Letters - Providing sustainable energy and cleaning water pollution are actually major societal issues requiring new catalysts. In particular, transition...     

Chemical and isotopic composition of CO2-rich magnesium–sodium–bicarbonate–sulphate-type mineral waters from volcanoclastic aquifer in Rogaška Slatina,Slovenia

Environmental Geochemistry and Health - Bottled natural mineral waters from an andesitic aquifer in Slovenia are enriched in magnesium (1.1 g/l), sulphate (2.2 g/l) and dissolved...     

Spatial distribution,pollution level,and health risk of Pb in the finer dust of residential areas: a case study of Xi'an,northwest China

Environmental Geochemistry and Health - The spatial distribution, pollution level, and exposure risk of Pb in the finer dust (particle size?<?63 μm) of residential...     

Complexation of plasmid DNA and poly(ethylene oxide)/poly(propylene oxide) polymers for safe gene delivery

Environmental Chemistry Letters - Gene delivery is the process of introducing foreign genetic material, such as DNA or RNA, into host cells. Gene...     

Synthesis and characterization of Fe-MCM-41 from rice husk silica by hydrothermal technique for arsenate adsorption

Rice husk (RH) agro-waste was used as a raw material for synthesizing mesoporous molecular sieves, MCM-41. The Fe-MCM-41 was prepared by the hydrothermal technique (HT), resulting in a higher surface area and crystallinity than when prepared under ambient conditions. In addition, a hexagonal structure was clearly seen with hydrothermal technique (HT) preparation. The adsorption of arsenate by HT-Fe-MCM-41 was investigated. The factors studied affecting arsenate adsorption capacity were ferric content in MCM-41, contact time, pH of solution, and initial arsenate concentration. It was found that HT-Fe-MCM-41 at the Si/Fe mole ratio of 10 gave the highest adsorption capacity. Arsenate adsorption reached equilibrium within 4 h. The adsorption capacity of HT-Fe-MCM-41 (Si/Fe = 10) was affected by the initial pH value and the initial arsenate concentration. The adsorption capacity was highest at pH 3 and decreased thereafter with increases in the pH of solution value. The Langmuir model fit the arsenate adsorption isotherm well. The maximum adsorption capacity for arsenate was 1,111 μg g⁻¹.     

Electrospinning production of nanofibrous membranes

Environmental Chemistry Letters - Electrospinning has attracted a worldwide interest as a technique for the production of nanofibrous membranes with diameter ranging 2 nm to several...     

Identification of disinfection by-product precursors by natural organic matter fractionation: a review

Environmental Chemistry Letters - During disinfection of drinking water, natural organic matter reacts with chlorine to produce harmful disinfection by-products. The...     

Improved lithium-ion batteries with coral-like anodes made of recycled spherical porous silicon coated with nitrogen-doped carbon

Environmental Chemistry Letters - With the development of the silicon smelting industry, the increase of microsilica waste has become a serious concern calling...     

The toxicity of the glyphosate herbicide for Pardosa spiders’ predatory activity depends on the formulation of the glyphosate product

Environmental Chemistry Letters - Glyphosate is an herbicide which was previously considered safe for non-target organisms. 825.8 million kilograms of glyphosate-based products were used...     

Low-temperature preparation of a N-TiO2/macroporous resin photocatalyst to degrade organic pollutants

Environmental Chemistry Letters - Highly active TiO2 photocatalysts prepared at a low temperature are promising reagents to degrade organic pollutants.  Moreover, the addition of...     

Conditions and processes of precipitation of iron compounds upon discharge of high-mineralized artesian water from artesian borehole R-30, Staro Oryahovo,Bulgaria

Environmental Geochemistry and Health - The artesian borehole R-30–Staro Oryahovo with total depth of 1740 m gives waters of chlorine–sodium type with a mineralization of...     

Advantages and disadvantages of techniques used for wastewater treatment

Environmental Chemistry Letters - During the last 30 years, environmental issues about the chemical and biological contaminations of water have become a major concern for society, public...     

High-resolution mapping of premature mortality induced by atmospheric particulate matter in China

Environmental Chemistry Letters - Air pollution, measured by the concentration of airborne particulate matter with diameter below 2.5 μm (PM2.5), is known to cause globally adverse...     

Historical changes in the major and trace elements in the sedimentary records of Lake Qinghai,Qinghai–Tibet Plateau: implications for anthropogenic activities

Environmental Geochemistry and Health - Sediment sequences in Lake Qinghai spanning the past 100 years were explored to assess the effects of changes in local land desertification, dust...     

Bioaccessible arsenic in soil of thermal areas of Viterbo,Central Italy: implications for human health risk

Environmental Geochemistry and Health - Thermal waters near the city of Viterbo (Central Italy) are known to show high As contents (up to 600 µg/l). Travertine is precipitated by...     

High photocatalytic removal of NO gas over SnO2 nanoparticles under solar light

Environmental Chemistry Letters - Tin oxide nanoparticles (SnO2 NPs) with a diameter less than 10 nm are usually used in waste water treatment via the photocatalytic reaction. However,...     

Biocompatible self-healing hydrogels based on boronic acid-functionalized polymer and laponite nanocomposite for water pollutant removal

Environmental Chemistry Letters - Global water pollution by organic dyes and metals may be solved by adsorption. In particular, hydrogel adsorbents display unique...