Postma says he hopes that an international scientific conference on the issue, to be held in Hanoi in November, will draw further official attention to arseniccontamination in the region.
This paper analyzed the behaviour of tungsten and arseniccontamination factor in phosphorous-arsenic slag under the condition of pressure digestion with NaOH for wolframite concentrate.
分析了在黑钨精矿碱压煮条件下，磷砷渣中钨和污染因子砷的行为。
3
Coal ash is known to contain dangerous elements including arsenic, lead, and selenium, yet the TVA refused at first to issue any health warnings about contamination from the spill.