新创综合化学实验:利用NBS-Py体系从电子废弃物中提取单质金

Comprehensive Innovative Experiment of Chemistry:Extract Gold from Electronic-Waste Using NBS-Py System

将前沿成果引入到大学本科综合实验,设计了利用NBS-Py体系从电子废弃物中提取单质金的新创综合化学实验。以氧化还原和配位理论为指导,利用N-溴代琥珀酰亚胺-吡啶(NBS-Py)体系温和、低毒和高效的特点,从电子废弃物中绿色提取金单质。该研究实验包含丰富的知识原理、实验技能、表征技术且应用性强,故可有效地转化为综合教学实验。在浸出、提取、还原、煅烧以及结构表征等过程中,始终贯穿以问题为导向的探究式教学模式。本实验可在提高学生基本实验技能的同时,锻炼学生运用基础理论理解实验原理、设计实验方案、自主探究和协调合作的能力,并在实验实施过程中的每一环节都注重提高学生的科研素养和创新能力。

In order to introduce the frontier achievements into the comprehensive experiment of undergraduates,a new comprehensive chemical experiment for green extraction of elemental gold from electronic waste using NBS-Py system was designed.By the guidance of redox and coordination theory,the gentle,high-efficiency,and low-toxicity of N-bromosuccinimide-Pyridine(NBS-Py)system is used to effectively extract gold environmentally in electronic waste.Since this gold-extraction method contains important knowledge principles,basic experimental skills and some characterization techniques,it is transformed into a comprehensive teaching experiment.During the processes of leaching,extraction,reduction,calcination and structural characterization,we always carry out the problem-oriented inquiring teaching mode.The application of innovative experiment in teaching process can improve students’basic experimental skills and promote students to utilize basic theoretical explaining experimental principles.Through designing experiment scheme independently and implementing experiment processes cooperatively,every link in the whole experiment teaching process is helpful to improve students’scientific research ability and innovation ability.