Remediation of petroleum hydrocarbons-contaminated soil: Analysis based on Chinese patents

Remediation of petroleum hydrocarbons-contaminated soil: Analysis based on Chinese patents

Crude oil

Bioremediation

Bacteria

Hydrocarbons

Gasoline

Biodegradation

Soil amendments

Biotechnology

Soil pollution

Soils

Degradation

Bacteriology

Petroleum chemistry

Microorganism

Patents and inventions

Increasing soil petroleum hydrocarbons (PHs) pollution have caused world-wide concerns. The removal of PHs from soils mainly involves physical, chemical, biological processes and their combinations. To date, most reviews in this field based on research articles, but limited papers focused on the integration of remediation technologies from the perspective of patents. In this study, 20-years Chinese patents related to the remediation of soil PHs were comprehensively analyzed. It showed an increasing number of patent applications and the patents’ quantity were positively correlated with Chinese GDP over the years, suggesting the more the economy developed the more environmental problems and corresponding solutions emerged. In addition, chemical technologies were mostly used in a combination to achieve faster and better effects, while the physical technologies were often used alone due to high costs. In all PHs remediation techniques, bacteria-based bioremediation was the most used from 2000 to 2019. Bacillus spp. and Pseudomonas spp. were the most used bacteria for PHs treatment because these taxa were widely harboring functions such as biosurfactant production and hydrocarbon degradation. The future research on joint technologies combining microbial and physicochemical ones for better remediation effect and application are highly encouraged.

134173

297

Chemosphere

2022

Wu, Yingjie

Liu, Xipeng

Dong, Qin

Xiao, Meijuan

Li, Bing

Topalović, Olivera

Tao, Qi

Tang, Xiaoyan

Huang, Rong

Chen, Guangdeng

Li, Huanxiu

Chen, Yulan

Feng, Ying

Wang, Changquan

journalArticle

0045-6535

10.1016/j.chemosphere.2022.134173

https://www.sciencedirect.com/science/article/pii/S004565352200666X