Themed collection Natural Organic Matter

Excited triplet states of chromophoric dissolved organic matter (³CDOM*) play a major role among the reactive intermediates produced upon absorption of sunlight by surface waters.

This review presents an overview of the separation techniques applied to the complex challenge of dissolved organic matter characterisation.

Terrestrial runoff represents a major source of mercury (Hg) to aquatic ecosystems.

Probe choice, pH, and [DOC] impact the apparent photochemical production of triplet dissolved organic matter in diverse natural waters.

CDOM photobleaching in the Yangtze estuary is affected by its source, and water temperature and pH but not salinity.

The measured electron donating capacity of sulfidic wetland pore waters is similar for three different methods.

Organic matter affects the degradation of triclosan as both a sequester and an electron shuttle.

A year-long measurement of size-resolved WSOC was made at an urban site to elucidate sources of size resolved WSOC. Droplet mode WSOC was primarily the result of atmospheric processing during the long range transport of biogenic and anthropogenic pollutants from the eastern regions of China.

This study investigated the multiple processes at the coastal plume zone by water quality characteristics and dissolved organic matter optical properties.

The effects of DOM on the photolytic kinetics and dioxin yields of representative HO-PXDEs in estuarine water are revealed.

Co-cycling of arsenic, manganese, iron, and dissolved organic carbon govern the extent and mode of geogenic arsenic mobilization into groundwater.

Solid phase extracts of freshwater dissolved organic matter are compared to the original sample with use of complementary techniques.

Humic acid mitigated the toxicity of graphene oxide nanosheets towards Escherichia coli via a physical barrier and weakening the oxidative stress.

Despite the fact that triplet excited state dissolved organic matter (DOM) enhances phototransformation of pesticides by acting as a photosensitizer, it may also decrease the overall phototransformation rate through various mechanisms.

Dissolved organic matter (DOM) was characterised in water samples sampled in the Lower Kinabatangan River Catchment, Sabah, Malaysia between October 2009 and May 2010.

The highest contribution of HULIS-C to WSOC was observed to be in the particle size bins of 0.55–1.0 μm and 1.8–3.1 μm during non-Asian dust (NAD, 45 ± 6%) and Asian dust (AD, 44 ± 7%) periods, respectively. HULIS exhibited a uni-modal (@0.55 μm) distribution during the NAD and a bimodal distribution (@0.32 and 1.8 μm) during AD, respectively.

This study explored the mechanisms responsible for pH and dissolved oxygen (DO) affecting the photodegradation of EE2 in dissolved humic acid (HA) solution.

Photochemical experiments demonstrate potential mechanistic differences between the photodemethylation of methylmercury and photoreduction of mercury(II) attached to dissolved organic matter.

The SPE resin choice (C18 vs. SDB-XC) affects the chemical composition of the resulting extract but differences between near and offshore dissolved organic matter samples remain clear.

The loss of peatland dissolved organic carbon (DOC) in filtered samples under long-term storage (4 °C in the dark) can be modelled simply using a calculated half-life.