With the wetland landscape in New Coastal District of Tianjin City as the chief study objective and based on the remote sensing and non-remote sensing data of ETM/TM with 1999-2007 as the time scale and the new admini...With the wetland landscape in New Coastal District of Tianjin City as the chief study objective and based on the remote sensing and non-remote sensing data of ETM/TM with 1999-2007 as the time scale and the new administrative region of New Coastal District as the space (scale) scope, this paper conducted the study on the landscape pattern change. The results showed that the natural wetland and agricultural land tended to decrease, while the saltern, maricultural areas and construction land increased apparently. The overall landscape shape tended to develop in simplification and regulation and with the development of population and social economy, human’s intervention to the landscape was getting improved.展开更多
药物和个人护理用品(Pharmaceutical and Personal Care Products,PPCPs)是在环境中长期存在并对人类乃至整个生态系统的健康造成威胁的两类化学消费品。珠江三角洲流域PPCPs的检出水平总体较高,沿海地区地下水中的PPCPs污染有待进一步...药物和个人护理用品(Pharmaceutical and Personal Care Products,PPCPs)是在环境中长期存在并对人类乃至整个生态系统的健康造成威胁的两类化学消费品。珠江三角洲流域PPCPs的检出水平总体较高,沿海地区地下水中的PPCPs污染有待进一步探究。于2021年9月在珠海市唐家湾镇采集了16个地下水样本,使用LC-MS/MS分析技术对21种PPCPs进行检测,使用数理统计方法和相关性分析对研究区地下水中PPCPs浓度特征和污染来源进行解析,并结合地下水化学特征及统计分析对其影响因素进行探究,旨在为滨海地区地下水的PPCPs特征分析提供案例依据。研究发现,1)研究区地下水呈弱酸至弱碱性,水化学类型多属于HCO_(3)-Ca型,沿地下水流方向受人为污染的影响越来越显著。2)研究区地下水中检测到6种PPCPs,平均质量浓度和检出率分别为:磺胺甲恶唑(5.51 ng·L^(-1),81%)、磺胺甲基嘧啶(1.18 ng·L^(-1),100%)、磺胺二甲基嘧啶(0.168 ng·L^(-1),25%)、卡马西平(35.7 ng·L^(-1),94%)、咖啡因(110 ng·L^(-1),100%)、西马特罗(0.100 ng·L^(-1),6%);磺胺类化合物和卡马西平从补给区到排泄区整体污染情况加重,存在一定累积效应,而咖啡因无明显的空间分布规律;可以将卡马西平视作研究区内PPCPs总体污染的潜在标志物。3)研究区地下水PPCPs属于农业和城镇活动的混合来源;磺胺二甲基嘧啶与水温呈显著正相关(P<0.05),与代谢菌群的繁殖和吸附过程有关;磺胺甲基嘧啶和咖啡因均与溶解氧呈显著负相关(P<0.05),与化粪池污水输入有关。综上所述,研究区地下水受到人类活动污染的程度较高,农业和城镇活动将大量PPCPs引入到地下水当中。展开更多
基金Supported by National Natural Sciences Foundation (30872039)Key Projects of Beijing Natural Sciences Foundation (09D0297)~~
文摘With the wetland landscape in New Coastal District of Tianjin City as the chief study objective and based on the remote sensing and non-remote sensing data of ETM/TM with 1999-2007 as the time scale and the new administrative region of New Coastal District as the space (scale) scope, this paper conducted the study on the landscape pattern change. The results showed that the natural wetland and agricultural land tended to decrease, while the saltern, maricultural areas and construction land increased apparently. The overall landscape shape tended to develop in simplification and regulation and with the development of population and social economy, human’s intervention to the landscape was getting improved.
文摘药物和个人护理用品(Pharmaceutical and Personal Care Products,PPCPs)是在环境中长期存在并对人类乃至整个生态系统的健康造成威胁的两类化学消费品。珠江三角洲流域PPCPs的检出水平总体较高,沿海地区地下水中的PPCPs污染有待进一步探究。于2021年9月在珠海市唐家湾镇采集了16个地下水样本,使用LC-MS/MS分析技术对21种PPCPs进行检测,使用数理统计方法和相关性分析对研究区地下水中PPCPs浓度特征和污染来源进行解析,并结合地下水化学特征及统计分析对其影响因素进行探究,旨在为滨海地区地下水的PPCPs特征分析提供案例依据。研究发现,1)研究区地下水呈弱酸至弱碱性,水化学类型多属于HCO_(3)-Ca型,沿地下水流方向受人为污染的影响越来越显著。2)研究区地下水中检测到6种PPCPs,平均质量浓度和检出率分别为:磺胺甲恶唑(5.51 ng·L^(-1),81%)、磺胺甲基嘧啶(1.18 ng·L^(-1),100%)、磺胺二甲基嘧啶(0.168 ng·L^(-1),25%)、卡马西平(35.7 ng·L^(-1),94%)、咖啡因(110 ng·L^(-1),100%)、西马特罗(0.100 ng·L^(-1),6%);磺胺类化合物和卡马西平从补给区到排泄区整体污染情况加重,存在一定累积效应,而咖啡因无明显的空间分布规律;可以将卡马西平视作研究区内PPCPs总体污染的潜在标志物。3)研究区地下水PPCPs属于农业和城镇活动的混合来源;磺胺二甲基嘧啶与水温呈显著正相关(P<0.05),与代谢菌群的繁殖和吸附过程有关;磺胺甲基嘧啶和咖啡因均与溶解氧呈显著负相关(P<0.05),与化粪池污水输入有关。综上所述,研究区地下水受到人类活动污染的程度较高,农业和城镇活动将大量PPCPs引入到地下水当中。
