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Ubiquitous Production of Organosulfates during Treatment of Organic Contaminants with Sulfate Radicals
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2021-06-04 , DOI: 10.1021/acs.estlett.1c00316
Jean Van Buren 1 , Amy A Cuthbertson 2 , Daniel Ocasio 2 , David L Sedlak 2
Affiliation  

Oxidation of organic contaminants by sulfate radical (SO4•–) is becoming more popular for the treatment of hazardous waste sites by in situ chemical oxidation and industrial wastewater by advanced oxidation processes. It is well documented that SO4•– can produce oxygen-containing transformation products similar to those produced by hydroxyl radical-based treatment processes, but SO4•– also has the potential to produce organosulfates by radical addition. Experiments conducted with a suite of 23 aromatic and five aliphatic compounds, including several contaminants typically detected at hazardous waste sites, demonstrated the formation of at least one stable sulfate-containing product for 25 of the compounds. These compounds likely exhibit higher mobility in the subsurface due to a lower affinity for surfaces (e.g., aquifer solids and activated carbon) than most other transformation products. Although the health risks associated with organosulfates are still uncertain, some aromatic organosulfates produced in this study (i.e., phenyl sulfate and p-cresyl sulfate) are known to be harmful uremic toxins. Further study of the formation, fate, and toxicity of organosulfates may be necessary before SO4•–-based treatment processes are more widely employed.

中文翻译:

在用硫酸根处理有机污染物过程中普遍产生有机硫酸盐

硫酸根 (SO 4 •– ) 对有机污染物的氧化在通过原位化学氧化处理危险废物场地和通过高级氧化工艺处理工业废水变得越来越流行。有充分证据表明,SO 4 •–可以产生与基于羟基自由基的处理工艺产生的类似的含氧转化产物,但 SO 4 •–也有可能通过自由基加成产生有机硫酸盐。使用一组 23 种芳香族化合物和 5 种脂肪族化合物(包括在危险废物场所通常检测到的几种污染物)进行的实验表明,其中 25 种化合物形成了至少一种稳定的含硫酸盐产物。由于与大多数其他转化产品相比,这些化合物对表面(例如,含水层固体和活性炭)的亲和力较低,因此可能在地下表现出更高的迁移率。尽管与有机硫酸盐相关的健康风险仍不确定,但本研究中产生的一些芳香族有机硫酸盐(即硫酸苯酯甲酚硫酸盐)已知是有害的尿毒症毒素。在更广泛地采用基于SO 4 的处理工艺之前,可能需要进一步研究有机硫酸盐的形成、归宿和毒性。
更新日期:2021-07-13
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