tailieunhanh - Mercury Hazards to Living Organisms - Chapter 12

Đề xuất thủy ngân Tiêu chuẩn Bảo vệ Tài nguyên và sức khỏe con người Thủy ngân tiêu chuẩn được đề xuất cho việc bảo vệ cây trồng đại diện, sinh vật dưới nước, chim và động vật có vú được thể hiện trong Bảng 12,1, và cho sức khỏe con người trong Bảng . Các tiêu chí này rất khác nhau giữa các quốc gia và thậm chí giữa các địa phương trong cùng một quốc gia. Trong trường hợp gần như tất cả, các tiêu chí này được liệt kê như nồng độ thủy ngân tổng số, với hầu. | Part 5 Proposed Mercury Criteria Concluding Remarks 2006 by Taylor Francis Group LLC Chapter 12 Proposed Mercury Criteria for Protection of Natural Resources and Human Health Proposed mercury criteria for the protection of representative crops aquatic organisms birds and mammals are shown in Table and for human health in Table . These criteria vary widely between nations and even between localities in the same nation. In almost every instance these criteria are listed as concentrations of total mercury with most if not all of the mercury present as an organomercury species. In some cases recommended mercury criteria are routinely exceeded as is the case for brown bears Ursus arctos in the Slovak Republic Zilincar et al. 1992 and in Italian seafood products recommended for human consumption Barghigiani and De Ranieri 1992 . agricultural crops Proposed mercury criteria for crop protection Table include pg L in irrigation water and to mg kg DW in soils of several countries although higher levels are allowable in cropland soils of New Jersey mg kg DW and the Former Soviet Union mg kg DW . Sludge and other wastes applied to European soils should contain mg Hg kg but higher levels of to mg Hg kg are permissible in solid wastes applied to agricultural soils of Iowa Maine Vermont and California Table . aquatic life In 1980 the . Environmental Protection Agency s proposed mercury criteria for freshwater aquatic life protection were pg L 24-h average not to exceed pg L at any time these criteria seemed to afford a high degree of protection to freshwater biota as judged by survival bioconcentration and biomagnification. Literature documented in USEPA 1980 showed that mercury concentrations in water of to pg L were fatal to sensitive aquatic species and that concentrations of to pg L were associated with significant sublethal effects. The 1980 proposed freshwater criteria provided