Identification of organically bound iodine in soil humic substances by size exclusion chromatography / inductively coupled plasma mass spectrometry (SEC / ICP-MS)

Redox reaction of iodine in paddy soil investigated by field observation and the I K-Edge XANES fingerprinting method

“…On the other hand, IO 3 ÿ is relatively immobile in soil since IO 3 ÿ can be sorbed on the soil components. Furthermore, organically bound iodine is considered as a sink of iodine in soil (Tikhomirov et al, 1980;Yuita, 1992;Yamada et al, 1999Yamada et al, , 2002Whitehead, 1973). The iodine concentration in paddy field soil was substantially lower than that in upland fields and forest soils (Yuita et al, 1982a,b;Muramatsu and Yoshida, 1993).…”

“…Major iodine species in soil include iodide (I ÿ ), iodate (IO 3 ÿ ), and organically bound iodine (Yuita, 1992;Yamada et al, 1999Yamada et al, , 2002. The mobility of iodine in soil is strongly controlled by the speciation of iodine.…”

“…Though the increased concentration of I ÿ in a soil solution after incubation of added IO 3 ÿ under flooded conditions was demonstrated by Yuita (1992), simultaneous evaluation of iodine species in both the solution and solid phases of soils is still required. Yamada et al (1999Yamada et al ( , 2002 proposed a speciation method of iodine in soil. When iodine species are already stabilized in the soil environment, those speciation procedures are quite useful to acquire information of the iodine speciation in soil.…”

Soil column experiments for iodate and iodide using K-edge XANES and HPLC–ICP-MS

“…Van Loon et al (2003a,b) and Glaus et al (2008) studied diffusion of iodide and iodate through Opalinus Clay, which is under investigation as a potential host rock for a high-level radioactive waste repository in Switzerland. Um and Serne (2005) performed a series of batch sorption and column experiments to investigate sorption and transport behavior of 99 Tc, 129 I, 79 Se, and 90 Sr on and through borehole sediments collected at the Hanford Site in the U.S. Major chemical forms of iodine in soil include iodide (I − ), iodate (IO 3 − ), and organically bound iodine (Yamada et al, 1999(Yamada et al, , 2002Yuita, 1992;Yamaguchi et al, 2006;Shimamoto and Takahashi, 2008), and the environmental behavior of iodine can be different among these species. In earlier research, Hu et al (2005) conducted integrated column and batch experiments to investigate the inter-conversion, sorption and transport of various iodine species (iodide, iodate, and 4-iodoaniline).…”

Iodine binding to humic acid

“…Its large surface area and significant presence in soil organic matter mean that it is highly influential 39 in determining soil iodine dynamics (Xu et al, 2011b, Yamada et al, 2002, Francois, 1987, Hansen et 40 al., 2011, Allard, 2006 …”