Publication | 广以毕业生杨逸凡在国际期刊上发表学术论文

《全环境科学》(Science of the Total Environment)是一份国际性的多学科期刊，主要发表整个环境科学领域新颖的、以假设驱动的并具有高影响力的研究，包括大气、岩石圈、水圈、生物圈和人类圈等。该期刊2020年影响因子为7.963，属中科院SCI分区环境科学类一区期刊，JCR分区Q1区期刊。

This study mainly focused on a biochemical composite material (BCM) formed by loading a strain of ureolytic bacteria isolated from heavy metal contaminated soil to the corncob powder as carrier, and examining its ability of facilitating microbially-induced calcite precipitation (MICP) while immobilizing exchangeable heavy metal contained compounds in soil. Specifically, the mechanism of such biochemical composite material in immobilizing heavy metals and its superiority in comparison with other composite materials were studied. 

This research can be applied to sites of soil contaminated by heavy metals, such as e-waste disposal sites, mines, etc., and has the potential to help purify soil and promote crop growth in contaminated farmland.

Yang Yifan said that out of interest in biological experiments, after learning that Prof. Varenyam Achal's research field was related to microbiology, he took the initiative to contact Prof. Varenyam Achal in the summer vacation of his junior year and expressed his intention to join the project. He then began the research under the guidance of his doctoral student Li Weila. "I was mainly responsible for a small part of the experimental design, and completed all the experimental process, data analysis, summary and paper writing together with Weila. I encountered some difficulties in the process. In the early stage of urease activity testing, I often contacted with highly toxic reagents. Later, some experiments are time-consuming and require a lot of aqua regia, which consumes energy."

At present, Yang Yifan is still working as a research assistant in Prof. Varenyam Achal's laboratory at GTIIT. He will start his postgraduate studies at Wageningen University in January, 2022.

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