午夜精品福利视频,亚洲激情专区,免费看a网站,aa毛片,亚洲色图激情小说,亚洲一级毛片,免费一级毛片一级毛片aa

南海湖沉積物中Hg的形態(tài)分布特征

時間:2023-04-25 20:53:26 環(huán)境保護論文 我要投稿
  • 相關推薦

南海湖沉積物中Hg的形態(tài)分布特征

摘要: 以包頭市南海湖為研究對象,采用連續(xù)化學提取法.系統(tǒng)開展了沉積物中Hg的形態(tài)分布研究.結果表明,表層沉積物中Hg含量的水平分布總體呈現湖心區(qū)低,西南和東北部湖區(qū)高的趨勢.腐殖酸結合態(tài)為表層沉積物中Hg的主導形態(tài),次為交換態(tài)和水溶態(tài).表層沉積物中生物有效態(tài)Hg的含量甚高,占總汞的76%~94%,對整個生態(tài)系統(tǒng)具有潛在危害性.沉積柱芯中總Hg表現為表層富集并隨深度增加而降低的變化趨勢.B、F站位柱狀沉積物中腐殖酸結合態(tài)Hg隨深度有規(guī)律的遞減,H站位20 cm以上Hg的主導形態(tài)為腐殖酸結合態(tài),殘渣態(tài)次之;20~30 cm的主導形態(tài)則為殘渣態(tài)及可交換態(tài). Abstract: The sequential extraction procedure was chosen for the study of speciation of Mercury in sediments of the Nanhai Lake. The fractions of water-soluble and exchangeable Hg are easy to release to the overlying water, and the sum of them account for 30. 82 % of the total Hg. Furthermore, there exists positive correlation between these two fractions and the total Hg in overlying water, indicating high potential hazard to the Nanhai Lake. The content of humic acid Hg is the highest both in horizontal and vertical distribution and the correlation coefficient between humic acid Hg and organic matter is up to 0. 72, indicating the contents of Hg and organic matter are highly correlated.Therefore, it is important that the organic matter is favor to immobilize Hg and reduce the potential Hg contamination of the Nanhai Lake. 作 者: 薩茹莉    何江    呂昌偉    樊慶云    寶金花    SA Ru-li    HE Jiang    L(U) Chang-wei    FAN Qing-yun    BAO Jin-hua   作者單位: 內蒙古大學生態(tài)與環(huán)境科學系,呼和浩特,010021  期 刊: 沉積學報  ISTICPKU   Journal: ACTA SEDIMENTOLOGICA SINICA  年,卷(期): 2009, 27(6)  分類號: X141  關鍵詞: 沉積物    Hg    形態(tài)分布    南海湖    Keywords: sediments    mercury    speciation distribution    the Nanhai Lake   

【南海湖沉積物中Hg的形態(tài)分布特征】相關文章:

詠湖中鴈詩11-17

小南海作文06-01

夢游南海作文08-06

小南海作文06-01

石壁精舍還湖中作原文03-10

謁南海神廟原文02-28

送鄭尚書出鎮(zhèn)南海,送鄭尚書出鎮(zhèn)南海張籍,送鄭尚書出鎮(zhèn)南海的意思,送鄭尚書出鎮(zhèn)南海賞析 -詩詞大全03-13

高中地理(中圖版)必修二《人口增長的模式及地區(qū)分布》11-06

《降水和降水的分布》教案02-25

《細菌和真菌的分布》教案03-09