Heavy metal removal from water/wastewater by nanosized metal oxides: a review.

The selective oxidation of C-H bonds and the use of O(2) as a stoichiometric oxidant represent two prominent challenges in organic chemistry. Copper(II) is a versatile oxidant, capable of promoting a wide range of oxidative coupling reactions initiated by single-electron transfer (SET) from electron-rich organic molecules. Many of these reactions can be rendered catalytic in Cu by employing molecular oxygen as a stoichiometric oxidant to regenerate the active copper(II) catalyst. Meanwhile, numerous other recently reported Cu-catalyzed C-H oxidation reactions feature substrates that are electron-deficient or appear unlikely to undergo single-electron transfer to copper(II). In some of these cases, evidence has been obtained for the involvement of organocopper(III) intermediates in the reaction mechanism. Organometallic C-H oxidation reactions of this type represent important new opportunities for the field of Cu-catalyzed aerobic oxidations.

Copper-Catalyzed Aerobic Oxidative C ? H Functionalizations: Trends and Mechanistic Insights

Antimony in the environment: a review focused on natural waters: I. Occurrence

This Perspective looks at how microbial anabolism and the soil microbial carbon pump control microbial necromass accumulation and stabilization; the ‘entombing effect’.

The importance of anabolism in microbial control over soil carbon storage

The effects of changes in ionic strength on the adsorption behavior of selenite (SeO32−) and selenate (SeO42−) on goethite and hydrous ferric oxide have been modeled using a generalized version of the triple-layer surface complexation model. Selenite adsorption, which is relatively unaffected by changes in ionic strength, is best modeled assuming that selenite forms an inner-sphere (surface coordination) complex; selenate adsorption, which is markedly reduced by increasing ionic strength, is best modeled assuming that selenate forms an outer-sphere (ion-pair) surface complex. The modeling results suggest that it is possible to distinguish between inner-sphere and outer-sphere anion surface complexes by studying the effects of ionic strength on anion partitioning.

Modeling ionic strength effects on cation adsorption at hydrous oxide/solution interfaces

Sorption of Copper and Lead by Hydrous Ferric Oxide

Chloride interference in cupric ion selective electrode measurements

A sampler for the in situ collection of marine sedimentary pore waters

A device for sampling the interstitial waters of deep-sea sediments in situ has been developed and tested The sampler collects a series of samples over a depth of 15 meters in the sediment and thus makes possible the accurate delineation of chemical gradients existing in the pore waters Samples collected in the North Atlantic indicate that significant gradients of K+ and Ca2+ exist in the sediments sampled Interstitial solutions sampled between Ireland and Cape Cod, Massachusetts, are characterized by the depletion of K+ and the enrichment of Ca2+

https://science.sciencemag.org/content/sci/181/4095/154.full.pdf

David N. Hume

Papers

Sorption of Copper and Lead by Hydrous Ferric Oxide

Chloride interference in cupric ion selective electrode measurements

A sampler for the in situ collection of marine sedimentary pore waters

In situ Sampler for Marine Sedimentary Pore Waters: Evidence for Potassium Depletion and Calcium Enrichment

Copper(II) Bromide Complexes. I. A Spectrophotometric Study