The Fukushima Daiichi nuclear power plant (DNPP) accident caused massive releases of radioactivity into the environment. released highly volatile fission products, such as (129m)Te, (131)I, (134)Cs, (136)Cs and (137)Cs were found to be widely distributed in its adjacent prefectures eastern Japan. However, release non-volatile actinides, particular, Pu isotopes remains uncertain almost one year after accident. Here we report isotopic evidence for atmosphere deposition on ground northwest...

Platycrater arguta is a rare and endangered deciduous shrub originating from the Tertiary Period. Understanding its drought tolerance crucial for conservation efforts enhancing resilience to environmental stress. This study aimed assess effects of varying levels stress on phenotype physiological-biochemical characteristics P. arguta. The subjected different using 10%, 20%, 30% polyethylene glycol-6000 (PEG-6000) over 10-day period. Additionally, exogenous melatonin application at various...

Since the Fukushima Daiichi nuclear power plant (FDNPP) accident in 2011, intensive studies of distribution released fission products, particular (134)Cs and (137)Cs, environment have been conducted. However, release sources, that is, damaged reactors or spent fuel pools, not identified, which resulted great variation estimated amounts (137)Cs released. Here, we investigated heavily contaminated environmental samples (litter, lichen, soil) collected from forests for long-lived (135)Cs...

Since the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident in 2011, activity ratio of 134Cs/137Cs has been widely used as a tracer for contamination source identification. However, because short half-life 134Cs (2.06 y), this will become unavailable near future. This article presents an analytical method determination long-lived 135Cs (t2/1 = 2 × 106 y) and atomic 135Cs/137Cs, promising geochemical tracer, environmental samples. The involves ammonium molybdophosphate (AMP)-selective...

The 239+240Pu activities and 240Pu/239Pu atom ratios in sediments of the northern South China Sea its adjacent Pearl River Estuary were determined to examine spatial temporal variations Pu inputs. We clarified that study area is sourced from a combination global fallout close-in Pacific Proving Grounds Marshall Islands where above-ground nuclear weapons testing was carried out during period 1952–1958. latter source dominated input 1950s, as evidenced by elevated (>0.30) dated sediment core....

An accurate and precise analytical method is highly needed for the determination of Pu isotopes in marine sediments long-term environment monitoring that being done since Fukushima Dai-ichi Nuclear Power Plant accident. The elimination uranium from sediment samples needs to be carefully checked. We established an based on anion-exchange chromatography SF-ICP-MS this work. A decontamination factor 2 × 10(6) was achieved, U concentrations final sample solutions were typically below 4 pg...

In this work, a complexation effect of Sb compounds with citric acid was observed using electrospray mass spectrometry (ES-MS). It found that both Sb(III) and Sb(V) could form complexes readily in an aqueous solution at room temperature. These were to be very stable various matrices (moat water extracts airborne particulate matter), therefore, novel HPLC-ICP-MS analytical method for the speciation environmental samples developed by effect. Sb(III)- Sb(V)-citrate separated on PRP-X100...

We investigated the vertical distributions of 239+240Pu and 137Cs activities 240Pu/239Pu atom ratios in two lakes northwestern China. The ratio from Chinese nuclear test (CNT) site at Lop Nor is too complicated to identify regional fallout source. However, radionuclides may be resolved mainly by distribution because there no overlap between global peak local peak. analyzed Pu isotopes sediments (Sugan Shuangta) located China, near CNT, Lake Sihailongwan northeastern China date recent...

Pu isotopes and (137)Cs were analyzed using sector field ICP-MS γ spectrometry, respectively, in surface sediment core samples from the Yangtze River estuary. (239+240)Pu activity (240)Pu/(239)Pu atom ratios (>0.18) shows a generally increasing trend land to sea north south This spatial distribution pattern indicates that Pacific Proving Grounds (PPG) source transported by ocean currents was intensively scavenged into suspended under favorable conditions, mixed with riverine as water...

The Fukushima Dai-ichi Nuclear Power Plant (DNPP) accident has caused serious contamination of the marine environment from atmospheric fallout deposition and direct discharges highly radioactive liquid wastes. In contrast to immediate intensive studies on distributions released fission products, such as 131I, 134Cs 137Cs, information possible by actinides in is quite limited. this study, we report first data-set distribution Pu isotopes surface sediments Pacific 30 km off after DNPP...

Abstract For the first time, soil core samples from Jiuquan region have been analyzed for Pu isotopes radioactive source identification and radiological assessment. The is in downwind Lop Nor Chinese nuclear test (CNT) site. high inventories (13 to 546 Bq/m 2 ) most of sampling locations revealed that this was heterogeneously contaminated by regional fallout CNTs. contributions CNTs total soils were estimated be more than 40% cases. 240 Pu/ 239 atom ratios ranged 0.059 0.186 with an...

Plutonium is extensively studied in radioecology (e.g., soil to plant transfer and radiological assessment) geochemistry sediment dating). Here, we reported a new chemical separation method for rapid determination of Pu samples, based on the following investigations: extraction behaviors interfering elements (IEs, inductively coupled plasma mass spectrometry (ICPMS) measurement) TEVA resin; decontamination U using TEVA, UTEVA, DGA resins; impact coprecipitation determination. The developed...

The Fukushima nuclear accident caused the release of large amounts radionuclides into environment.

The total 239-240Pu activity and 240Pu/239Pu atom ratio in the sediments Sagami Bay of western Northwest Pacific margin were investigated using ICP-MS with a shield torch system. 239+240Pu inventories examined sediment cores found to be much higher than those predicted from atmospheric global fallout (42 MBq/km2) at same latitude. In addition, elevated ratios ranging 0.22 0.28 observed samples. On basis vertical profiles characterized core collected center Bay, we identified two distinct...

We examined the vertical distributions of 239+240Pu activity and 240Pu/239Pu atom ratio in settling particles quantified particulate fluxes water column western Northwest Pacific. Settling particle samples were collected using sediment traps. Plutonium isotopes analyzed a sector field high-resolution ICP-MS. To best our knowledge, this is first time that both Pu isotope data have been obtained for Pacific Ocean. The high (>0.18) ratios indicate plutonium from Proving Grounds (PPG) source...