Enhanced removal of organic pollutants from super heavy oil wastewater using specially modified lignite activated coke,Environmental Science: Water Research & Technology

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Enhanced removal of organic pollutants from super heavy oil wastewater using specially modified lignite activated coke
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2020-04-01 , DOI: 10.1039/d0ew00033g
Kun Tong _{1,

2,

2,

3,

4} , Guodong Ji _{3,

5,

6,

7} , Fan Nie _{1,

2,

2,

3,

4} , Mingdong Zhang _{1,

2,

2,

3,

4} , Wen Ren _{1,

2,

2,

3,

4} , Shuixiang Xie _{1,

2,

2,

3,

4}

Affiliation

Lignite activated coke (LAC) has been modified in situ by adsorbing the biodegradation effluent of super heavy oil wastewater (SHOW) to extract organic pollutants from raw SHOW before biodegradation is investigated. Results showed that, in comparison with LAC, modified lignite activated coke (MLAC) exhibited a higher COD removal amount and adsorption capacity with the increase of dosage. The modification process also contributed to a dramatic COD decrease in the final effluent of SHOW from 128.9 mg L⁻¹ to below 50 mg L⁻¹. Particularly, characterization methods, GC-MS, FTIR, XPS and Boehm titration, were performed to investigate the relationship between the modification and the treatment performance. Results indicated that some basic substances were extracted from the biodegradation effluent by LAC during the modification process. Thus the alkali-nitrogen base abundant MLAC could remove larger acidic fractions from the raw SHOW during the adsorption process, leading to a higher adsorption capacity for MLAC. Furthermore, this clean and low cost in situ modification method also provides more reliable disposal effects for SHOW.

中文翻译：

使用经过特殊改性的褐煤活化焦炭，提高了从超重油废水中去除有机污染物的能力

在研究生物降解之前，通过吸附超重油废水（SHOW）的生物降解流出物从原SHOW中提取有机污染物，对褐煤活化焦（LAC）进行了原位改性。结果表明，与LAC相比，改性褐煤活性炭（MLAC）随着剂量的增加，其COD去除量和吸附能力更高。改性过程还使SHOW的最终出水COD从128.9 mg L ^-1急剧下降到50 mg L ^-1以下。。特别地，进行了表征方法，GC-MS，FTIR，XPS和Boehm滴定，以研究改性与处理性能之间的关系。结果表明，在改性过程中，LAC从生物降解废水中提取了一些碱性物质。因此，在吸附过程中，碱氮基丰富的MLAC可以从原料SHOW中除去较大的酸性馏分，从而提高了MLAC的吸附能力。此外，这种清洁和低成本的原位改性方法还为SHOW提供了更可靠的处理效果。

更新日期：2020-04-01

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