Pei Liang, Wang Chunhui, Sun Liying
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
Toxics. 2022 Aug 16;10(8):476. doi: 10.3390/toxics10080476.
Unconventional water is an important water resource for agricultural utilization in the drought and water shortage of Northeast China. Additionally, exploration in making full use of it is an important way to alleviate water shortage in China. This paper analyzed the effects of unconventional water through field trials on the accumulation of heavy metals in both cucumbers and the typical black clay soil (expressed as black soil) around the Anshan metallic ore. By exploring the effects of unconventional water after secondary treatment on the accumulation characteristics of heavy metals in cucumbers and the heavy metal balance in the soil-crop system under different conditions, the study shows that there are no significant differences in the heavy metal content when the quantity of unconventional water for irrigation varies. Unconventional water for short-term irrigation does not cause pollution to either the soil environment or the crops. Nor will it cause the accumulation of heavy metals, and the index for the heavy metal content is far below the critical value of the trade standard and national standard, which indicates that the crops irrigated with unconventional water during their growth turn out to be free of pollutants. Unconventional water brings less heavy metals into the black soil than crops. The input and output quantities have only small effects on the heavy metal balance in the black soil. This paper provides a reference for the safety control and evaluation of unconventional agricultural utilization.
非常规水是中国东北干旱缺水地区农业利用的重要水资源。此外，充分探索利用非常规水是缓解我国水资源短缺的重要途径。本文通过田间试验，分析了非常规水对鞍山金属矿区周边黄瓜及典型黑黏土（简称黑土）中重金属积累的影响。通过探究二级处理后的非常规水在不同条件下对黄瓜中重金属积累特征及土壤-作物系统中重金属平衡的影响，研究表明，不同灌溉量的非常规水在重金属含量上无显著差异。短期灌溉非常规水不会对土壤环境和作物造成污染，也不会导致重金属积累，重金属含量指标远低于行业标准和国家标准的临界值，表明生长期间用非常规水灌溉的作物无污染。非常规水带入黑土的重金属比作物带出的少，其输入输出量对黑土中重金属平衡影响较小。本文为非常规水农业利用的安全控制与评价提供了参考。
