1、 本科毕业论文 外文文献及译文 文献、资料题目：Arsenic in the environment: Biology and Chemistry 文献、资料来源： 网络 文献、资料发表（出版）日期： 院 （部） ：化学化工系 专 业：化学工程与工艺 班 级： 姓 名： 学 号： 指导教师： 翻译日期： 1 外文文献：外文文献： Arsenic in the environment: Biology and Chemistry Abstract： Arsenic (As) distribution and toxicology in the environment is a serious i
2、ssue, with millions of individuals worldwide being affected by As toxicosis. Sources of As contamination are both natural and anthropogenic and the scale of contamination ranges from local to regional.There are many areas of research that are being actively pursued to address the As contamination pr
3、oblem. These include new methods of screening for As in the field, determining the epidemiology of As in humans, and identifying the risk of As uptake in agriculture.Remediation of As-affected water supplies is important and research includes assessing natural remediation potential as well as phytor
4、emediation. Another area of active research is on the microbially mediated biogeochemical interactions of As in the environment. In 2005, a conference was convened to bring together scientists involved in many of the different areas of As research. In this paper, we present a synthesis of the As iss
5、ues in the light of long-standing research and with regards to the new findings presented at this conference. This contribution provides a backdrop to the issues raised at the conference together with an overview of contemporary and historical issues of As contamination and health impacts.Crown Copy
6、right . 2007 Published by Elsevier B.V. All rights reserved. 1. Introduction 1.1. Location and scale of problem Arsenic (As) has been detected in groundwater in several countries of the world, with concentration levels exceeding the WHO drinking water guideline value of 10 g/L (WHO, 2001) as well as the national regulatory standards (e.g. 50 g/L in India and Bangladesh, Ahmedet al., 2004; Mukherjee et al., 2006). Arsenic in groundwater is often associated with geologic sources, b
