多金属矿带环境质量与居民的全膳食暴露研究-以广西南丹为例

The Nandan, Located in the northwest of Guangxi Zhuang Autonomous Region, polymetallic belt bears rich resources of Arsenic, mercury, zinc, copper, cadmium, chromium, nickel, lead, tin, indium and gallium, which of arsenic reserves accounted for 27 percent of our country and 19 percent of the world. After years of Mining activities, the ecological environment in mining area and its downstream seriously deteriorated, and a large number of waste water with heavy metal, such as arsenic, cadmium and lead, discharged into the Diao River. How about quality of soil and agricultural products influenced by mining activities? And the residents of heavy metal exposure are safe? What is impact on human body? These issues are not yet to be answered and need for systematic investigation. With the core of soil - hair - agriculture products- human health, the methods of multi-disciplinary of geostatistics, environmental chemistry and soil science are adopted. And a systematic investigation will be conducted on the metal concentration in soil and agricultural products in the Nandan County. Combined with geostatistics and classical statistical methods, the soil - crop contaminants relationships will be fitted. The full dietary survey will be implemented to assess the risk of intake of arsenic, lead and cadmium and other pollutants in food local produced.And then put forward measures to reduce the risks.

广西南丹多金属矿带内蕴藏着丰富的锡、锌、铅、砷和铟等（类）金属矿产资源，其中砷储量分别占全国和全球的27%和19%。经过多年的开采和冶炼，矿区周边及下游地区生态环境严重恶化，大量含砷、镉、铅等重金属废水直接排入刁江。受影响区域的土壤和农产品质量如何呢，居民重金属暴露量是安全的吗？到底有多大隐患呢？这些问题尚无从回答，需要开展系统调查。项目以土壤-农产品-人体健康为主线，将头发中砷等污染物含量作为指示，以广西南丹多金属矿带及其周边区域为研究对象，集成环境地学、地统计学、环境化学和土壤学多学科的理论与方法，系统调查研究区域土壤、发样和农产品中优先污染物含量；通过全膳食调查，评估多金属矿带及周边区域人群砷、铅和镉等主要污染物的摄入量与健康风险，并据此提出降低风险的应对措施。

广西南丹多金属矿带内蕴藏着丰富的锡、锌、铅、砷和铟等（类）金属矿产资源，其中砷储量分别占全国和全球的27%和19%。经过多年的开采和冶炼，矿区周边及下游地区生态环境严重恶化，大量含砷、镉、铅等重金属废水直接排入刁江。受影响区域的土壤和农产品质量如何呢，居民重金属暴露量是安全的吗？到底有多大隐患呢？.对南丹县土壤和主要农产品重金属含量进行较为系统调查，还在三个典型矿业活动影响区和对照区选择了一个自然村进行春、秋两季的全膳食调查抽样测试，评估其人群包括全膳食在内的全暴露摄入风险。.项目以土壤-农产品-人体健康为主线，首先对南丹县土壤和主要粮食作物进行系统调查，在此基础上，以南丹矿业密集区车河镇大湾村、大厂镇铜坑村和受含尾砂洪水淹没的长老乡金洞村为调查影响区，而远离矿业活动的六寨镇者远村为对照区，对上述四个自然村进行全膳食调查，评估人群健康风险；共采集土壤农产品、大气、饮用水、发样和尿样共2500余个，共获得10000余个第一手数据。调查发现，矿业影响区人群全暴露摄入砷、铅、镉和锑等重金属量为对照区的1.8-4.5倍，其中谷物类、肉类和蔬菜为主要贡献者。.项目通过对南方丘陵地带多金属矿区南丹土壤环境开展系统调查，基于此，获得网格布点与局部加密技术结合而形成的分层抽样技术，可为南方丘陵地带土壤调查提供借鉴。通过系统调查，已获得南丹多金属矿带及其周边与下游受影响区域土壤、人群发样和农产品的主要污染物含量和人群健康的成套数据，可为南丹乃至其它相关矿业活动影响区环境污染评价和风险管控提供参考。