Mobilization and methylation of mercury with sulfur addition in paddy soil: Implications for integrated water-sulfur management in controlling Hg accumulation in rice

Mercury and Sulfur Redox Cycling Affect Methylmercury Levels in Rice Paddy Soils across a Contamination Gradient

“…The certified reference material (CRM) ERM-CC580 was used, and the MeHg recovery measurement for CRM ranged from 76.2 to 108.4%, with an average of 85.2 ± 9.07% (n = 26), which is comparable with previous studies. 7,16,22,25,46,49 Duplicates were added every 10 samples during measurement, and the relative standard + in the liquid phases of all paddy slurries were 2−3 orders of magnitude higher than those of NO 3 − ; the highest NO 3 − concentrations were observed in the autoclaved treatments (Figure S3). Higher Fe 2+ percentages in total Fe (Fe 2+ + Fe 3+ ) were found in the two S treatments, as compared to the control treatment, at all sites (p < 0.05, Figure S4).…”

“…Therefore, S-regulated Hg transformation in agricultural fields (e.g., paddy soils) requires more attention. To date, limited studies have examined S input-influenced Hg transformation in paddy soils, with both promotion and inhibition of Hg II methylation reported. − Most of these studies were based on bulk Hg concentration measurements, with little investigation of the precise transformation processes of Hg. Moreover, S species with different valent states determine the redox cycling of S and, thus, influence Hg transformation .…”

Covalently Functionalized Cellulose Nanoparticles for Simultaneous Enrichment of Pb(II), Cd(II) and Cu(II) Ions

“…Although some metals are necessary as nutrients, many of them have some degree of toxicity and have an adverse effect on the ecosystem [ 10 , 11 , 12 ]. Several natural phenomena and mostly anthropogenic actions, such as ore mining and processing, fossil fuel combustion and chemical industries, are the major sources of their exposure to humans [ 13 , 14 , 15 , 16 ]. Metals are concentrated and redistributed due to human activity in regions that are not naturally metal-enriched [ 7 , 17 ].…”

Self-Constructing 100% Water-Resistant Metal Sulfides through In Situ Acid Etching for Effective Elemental Mercury (Hg0) Capture

“…The rapid escalation of industrial scale and the lack of effective countermeasures have made mercury pollution a major environmental concern in the 21st century, attributed to its transportability, persistence, transformability, and hypertoxicity. − The recognition of global mercury pollution urges the development of effective mercury pollution control policies and methods, and the implementation of the Minamata Convention marks a milestone along the road toward a mercury pollution-free world. − The convention encourages the design of efficient, cost-effective, and scalable techniques for Hg pollution abatement from anthropogenic sources like industrial flue gas . Considering that water-soluble oxidized mercury (Hg 2+ ) and collectable particulate-bounded mercury (Hg p ) can be removed by flue gas cleaning devices like wet desulfurization systems and particulate control facilities, elemental mercury (Hg 0 ) capture becomes the primary challenge facing the fulfillment of the Minamata Convention. − Although the absorption techniques using activated carbons (ACs) are commercialized under specific scenarios, their extensive application opportunities are limited considering the low Hg 0 adsorption capacities of ACs, their dramatic performance fluctuations under the influences of flue gas components (e.g., SO 2 and H 2 O), and the metastable or unstable nature of adsorbates on AC surfaces. − Striving research is thus continuously conducted to find ideal alternatives to ACs for Hg 0 removal from industrial flue gas.…”