Dynamics of organic and inorganic arsenic in the solution phase of an acidic fen in Germany

Effect of Iron (Fe2+) Concentration in Soil on Arsenic Uptake in Rice Plant (Oryza sativa L.) when Grown with Arsenate [As(V)] and Dimethylarsinate (DMA)

“…Zhao et al (2010) have recently reviewed the interactions between inorganic arsenic (iAs) and Fe(III)-oxides/hydroxides in uptake by rice plant. However, methylated arsenic compounds such as dimethylarsinate (DMA), monomethylarsonic acid (MMAA) and trimethylarsine oxide (TMAO) are also found in soil as minor components (Huang and Matzner, 2006;Takamatsu et al, 1982). These methylated arsenicals in paddy soils is supposed to be produced from iAs through biomethylation by some soil microorganisms or algae (Bentley and Chasteen, 2002;Takamatsu et al, 1982).…”

Arsenic in Natural Environments

“…Like other surface environments, arsenic in wetland water, sediments, and soils (including peats) may originate from a variety of sources, including seawater (Dellwig et al, 2002), natural weathering, mining wastes, pesticide runoff, the leaching of chromated copper arsenate (CCA)-treated wood ( (Cobb et al, 2006); Chapter 5), geothermal waters (Chagué-Goff, Rosen and Eser, 1999), groundwater , and air emissions from coal combustion facilities ( (Graney and Eriksen, 2004;Shotyk et al, 2003); Tables 3.11 and 3.12). Peats and other wetland soils often contain a variety of organoarsenicals, including methylarsenic, arsenobetaine ((CH 3 ) 3 As + CH 2 CO 2 − ), arsenocholine ((CH 3 ) 3 As + CH 2 CH 2 OH), and arsenosugars, all of which result from biological activity (Huang and Matzner, 2006). Peats are also capable of absorbing significant amounts of arsenic from water.…”

“…Under strong reducing conditions, arsenic may sorb, precipitate, and/or coprecipitate with sulfide compounds. Microorganisms may also reduce arsenic and methylate it ( (Huang and Matzner, 2006); Chapter 4). As an example, microbiological activity in organic soils of a German acidic fen produced As(III) and a variety of organoarsenicals in porewaters, including MMA(V), DMA(V), trimethylarsine oxide (TMAO; (CH 3 ) 3 AsO), tetramethylarsonium ions (TETRA; (CH 3 ) 4 As + ), arsenobetaine, and unknown species (Huang and Matzner, 2006).…”

Utilisation of Lignins in the Bioeconomy: Projections on Ionic Liquids and Molecularly Imprinted Polymers for Selective Separation and Recovery of Base Metals and Gold

“…Due to the nature of the molecule(s) as a novel commodity for many interesting natural and manufactured products [26][27][28][29], a modern bioeconomy [30][31][32][33] is not simply a rerun of former ones. This new discourse needs to help us understand how technologies [34][35][36][37][38] for managing and processing lignocellulosic materials both as biosynthetic moieties [39][40][41][42][43][44][45][46][47][48][49], biogenic wastes [50][51][52][53][54][55][56][57][58] or simply renewable biopolymer [59][60][61][62][63][64][65][66][67][68][69]-both established and novel-should be deployed and integrated (or not) to meet developmental requirements of the sustainability paradigm [70][71]…”