Phytoremediation Reduces Dust Emissions from Metal(loid)-Contaminated Mine Tailings.
Phytoremediation Reduces Dust Emissions from Metal(loid)-Contaminated Mine Tailings.
复制标题
DOI：
10.1021/acs.est.7b05730
复制
发表时间：
2018-05-15
影响因子：
11.4
通讯作者：
Maier RM
中科院分区：
文献类型：
--
作者：
Gil-Loaiza J;Field JP;White SA;Csavina J;Felix O;Betterton EA;Sáez AE;Maier RM
与采矿作业产生的空气颗粒物有关的环境和健康风险问题主要集中在冶炼活动上。然而，美国只有3家活跃的铜冶炼厂和不到12家其他金属冶炼厂，相比之下，美国估计有50万座废弃和未回收的硬岩尾矿，这些尾矿有可能产生粉尘。这个问题还可能延伸到现代尾矿库，这些尾矿库可能需要数十年的建设时间，并在随后的回收之前保持贫瘠。我们在铁矿和洪堡冶炼厂超级基金(IKMHSS)场地的植物修复野外试验中，研究了植被覆盖和灌溉对尾矿粉尘排放和金属(Loid)迁移的影响。对植被修复后水平沙尘通量的测量表明，植被覆盖度为16%和32%的草地平均尘埃沉降量分别为371.7和606.1 g m−2 y−1，而对照处理的平均扬尘速率为2323 g m−2 y−1。植被覆盖小区的水平沙尘通量和沙尘排放量与未受干扰草地的排放速率相当。此外，植物修复有效地降低了细颗粒物的浓度，包括PM1、PM2.5和PM4，这些颗粒物是健康风险最大、长途运输潜力最大的空气颗粒物。这项研究表明，植物修复可以大大减少粉尘排放和尾矿风吹污染物的输送。
Environmental and health risk concerns relating to airborne particles from mining operations have focused primarily on smelting activities. Yet there are only three active copper smelters and less than a dozen smelters for other metals compared to an estimated 500,000 abandoned and un-reclaimed hard rock mine tailings in the US, that have the potential to generate dust. The problem can also extend to modern tailings impoundments, which may take decades to build and remaining barren for the duration, before subsequent reclamation. We examined the impact of vegetation cover and irrigation on dust emissions and metal(loid) transport from mine tailings during a phytoremediation field trial at the Iron King Mine and Humboldt Smelter Superfund (IKMHSS) site. Measurements of horizontal dust flux following phytoremediation reveals that vegetated plots with 16% and 32% canopy cover enabled an average dust deposition of 371.7 and 606.1 g m−2 y−1, respectively, in comparison to the control treatment which emitted dust at an average rate of 2,323 g m−2 y−1. Horizontal dust flux and dust emissions from the vegetated field plots are comparable to emission rates in undisturbed grasslands. Further, phytoremediation was effective at reducing the concentration of fine particulates, including PM1, PM2.5, and PM4, which represent the airborne particulates with the greatest health risks and the greatest potential for long-distance transport. This study demonstrates that phytoremediation can substantially decrease dust emissions as well as the transport of windblown contaminants from mine tailings.
登录
查看更多内容
影响因子：
3.7
作者：
Field, Jason P.;Breshears, David D.;Zou, Chris B.
通讯作者：
Zou, Chris B.
影响因子：
4.4
作者：
Gillette, DA;Fryrear, DW;Gearhart, EA
通讯作者：
Gearhart, EA
影响因子：
4.2
作者：
Kim, JY;Kim, KW;Lee, CH
通讯作者：
Lee, CH
影响因子：
4.5
作者：
Hudson-Edwards, Karen A.;Jamieson, Heather E.;Lottermoser, Bernd G.
通讯作者：
Lottermoser, Bernd G.
影响因子：
2.9
作者：
Csavina, Janae;Landazuri, Andrea;Wonaschuetz, Anna;Rine, Kyle;Rheinheimer, Paul;Barbaris, Brian;Conant, William;Saez, Avelino Eduardo;Betterton, Eric A.
通讯作者：
Betterton, Eric A.