Establishment of evaluation system for biological remediation on organic pollution in groundwater using slow-release agents

Xinyue Du; Xiaoran Zhang; Junfeng Liu; Ziyang Zhang; Liyuan Wu; Xiaojuan Bai; Chaohong Tan; Yongwei Gong; Yuling Zhang; Haiyan Li

doi:10.1016/j.scitotenv.2023.166522

Establishment of evaluation system for biological remediation on organic pollution in groundwater using slow-release agents

Sci Total Environ. 2023 Dec 10:903:166522. doi: 10.1016/j.scitotenv.2023.166522. Epub 2023 Aug 23.

Authors

Xinyue Du¹, Xiaoran Zhang², Junfeng Liu³, Ziyang Zhang⁴, Liyuan Wu¹, Xiaojuan Bai¹, Chaohong Tan⁴, Yongwei Gong⁴, Yuling Zhang⁵, Haiyan Li¹

Affiliations

¹ Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 102616, China; Beijing Energy Conservation & Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center, Beijing University of Civil Engineering and Architecture, Beijing 102616, China; Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 102616, China.
² Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 102616, China; Beijing Energy Conservation & Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center, Beijing University of Civil Engineering and Architecture, Beijing 102616, China; Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 102616, China. Electronic address: zhangxiaoran@bucea.edu.cn.
³ Department of Water Conservancy and Civil Engineering, Beijing Vocational College of Agriculture, Beijing 102442, China.
⁴ Beijing Energy Conservation & Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center, Beijing University of Civil Engineering and Architecture, Beijing 102616, China; Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 102616, China.
⁵ Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China.

PMID: 37625714
DOI: 10.1016/j.scitotenv.2023.166522

Abstract

In situ bioremediation through slow-release agents can continuously degrade organic pollutants for a long time and have high application potential in solving problems such as tailing and rebound. However, the existing evaluation system is difficult to reflect the performance of bioremediation through slow-release agents, which is not conducive to the promotion of technology. It is urgent to establish a targeted evaluation system. Therefore, based on the multi-criteria decision-making method (MCDA), a comprehensive evaluation model was established. The evaluation index system was constructed for bioremediation through slow-release agents consisting of 16 indicators including pollutant degradation rate, agent preparation cost, engineering operation and maintenance cost, secondary pollution, long-term degradation stability, slow release time, slow release stability, increase in functional microbial flora, increase in total DNA content, agent particle size, solid agent morphology, liquid agent viscosity, dispersibility in aqueous phase, zeta potential, operability of agent preparation, and engineering operation management difficulty. Then, the weight of the indicators was determined by using the best-worst method (BWM), and evaluation criteria was established based on relevant norms and literature. Both and the indicators aggregation simple additive weighting (SAW) method constitute a quantitative evaluation model. The above content together constitutes a new evaluation system for biological remediation on organic pollution in groundwater using slow-release agents, which was defined as AOBS evaluation system. In order to verify the rationality and scientificity of the evaluation system, a typical bioremediation slow-release agent was evaluated using the established AOBS evaluation system. The results showed that the evaluation system could reasonably and comprehensively evaluate bioremediation through slow-release agents and provide suggestions for agent improvement.

Keywords: Bioremediation; Evaluation system; MCDA; Organic pollution of groundwater; Slow-release agents.