Mercury Fractionation in Superficial Sediment and Paddy Soil Samples from Tianjin, Northern China

Abstract

Sediment and soil samples from the Beitang River (BR) and the Haihe River (HR) in Tianjin were analyzed to investigate the extent of mercury contamination. The results show that total mercury (THg) contents in the BR and HR sediments were 2241 ± 1024 and 653 ± 450 ng g(-1), and THg in rice paddy soils were 907 ± 345 and 328 ± 286 ng g(-1), respectively. Industrial and domestic sewage were regarded as the main sources of mercury in the two river basins. Sediment-bound mercury in the BR and the HR were found to be predominantly associated with the organic-bound fraction (55 %) and residual fraction and (54 %), while soil-bound mercury was mainly in organic-bound fraction in paddy soils (61 % and 57 %, respectively). The availability of this element (soluble and exchangeable and specifically sorbed fraction) seemed restricted, but significantly higher in the paddy soils than in sediments. Higher soluble and exchangeable, specifically sorbed fraction and organic-bound fraction may promote the higher toxic methylmercury and bioavailable fraction formation in the soils during the rice cultivation.

Gambaran Fungsi Kognitif Yang di Ukur dengan MMSE Pada Pasien Riwayat Stroke di Poli Saraf RSUD Dr. H. Abdul Moeloek Bandar Lampung Tahun 2021

“…Hasil penelitian ini sejalan dengan penelitian yang dilakukan (Wu et al, 2016) di Binhai New Area di Tianjin, China yang meneliti gangguan fungsi kognitif dengan studi case countrol yang menggunakan sampel sebanyak 112 subjek kelompok kasus yang menderita gangguan fungsi kognitif dibandingkan dengan 115 subjek sebagai kelompok kontrol didapatkan sebanyak 79 subjek perempuan di kelompok kasus dan 55 subjek perempuan di kelompok kontrol. Hal ini secara signifikan menggambarkan bahwa subjek perempuan pada kelompok kasus lebih tinggi (70,54%) dibandingkan subjek laki-laki.…”