新型生物炭材料对TNT生产废水去除性能

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张瑛,白璐璐,赵昱昊.新型生物炭材料对TNT生产废水去除性能[J].,2022,62(1):37-45

新型生物炭材料对TNT生产废水去除性能

Removal performance of TNT production wastewater with novel biochar materials

DOI：10.7511/dllgxb202201005

中文关键词:生物炭(BC)持久性自由基(PFRs)纳米零价铁(nZVI)nZVI/BCPFRs TNT生产废水

英文关键词:biochar (BC)persistence free radicals (PFRs)nano zero valent iron (nZVI)nZVI/BCPFRs TNT production wastewater

基金项目:国家自然科学基金资助项目(21477014)；国家重点研发计划资助项目(2020YFC1807804).

作者	单位
张瑛,白璐璐,赵昱昊

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中文摘要:

合成了新型含持久性自由基(PFRs)的生物炭(BCPFRs)及其复合材料nZVI/BCPFRs，考察了BCPFRs在添加氧化剂(BCPFRs/Fe2+/H2O2和BCPFRs/Fe3+/H2O2)和不添加氧化剂(nZVI/BCPFRs)条件下对TNT生产废水的去除性能．结果表明nZVI/BCPFRs的去除效果最显著，对总有机碳(TOC)的去除率为58%，对总氮(TN)的去除率为78%，Fe2+/H2O2的矿化能力和Fe3+/H2O2的脱氮能力在BCPFRs的诱导下分别提高了8.4%和17.4%．对处理前后的废水进行毒性分析，结果表明nZVI/BCPFRs处理后的出水毒性最小．GC-MS和LC-MS对废水组分的检测结果表明，处理后出水中硝基芳烃化合物的种类大大减少，nZVI/BCPFRs体系对TNT生产废水的去除率最高，表明nZVI/BCPFRs复合材料在难降解污染物的去除领域具有很好的应用前景．

英文摘要:

A new kind of biochar (BCPFRs) containing persistent free radicals (PFRs) and its composite nZVI/BCPFRs are synthesized. The performances of BCPFRs with oxidant as BCPFRs/Fe2+/H2O2, BCPFRs/Fe3+/H2O2 and without oxidant as nZVI/BCPFRsare investigated in the removal performance of TNT production wastewater. It is found that nZVI/BCPFRs exhibits the best performance on total organic carbon (TOC) and total nitrogen (TN)with removal rate of 58% and 78%, while the addition of BCPFRsimproves the mineralization ability of Fe2+/H2O2(8.4%) and the denitrification ability of Fe3+/H2O2 (17.4%). Meanwhile, the toxicity analysis of the TNT wastewater before and after treatment shows that the effluent toxicity from nZVI/BCPFRssystem is less than others. The components analysis of wastewater with GC-MS and LC-MS shows that the types of nitroaromatic compounds are dominantly reduced, where nZVI/BCPFRssystem gives the best removal performance. The results suggest nZVI/BCPFRscomposite is a kind of promising material to tackle the contaminants released in environment.

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新型生物炭材料对TNT生产废水去除性能

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