“…WEEE contains more than 1000 kinds of persistent hazardous materials (such as barium (Ba), lithium (Li) and mercury (Hg), etc.) which contaminate the environment and harm human health [6,7], and more than 60% recoverable high-value metals [8][9][10] in 2002 to diminish the environmental contamination effect from brown goods, white goods and batteries [13]. Brown goods refer to relatively light electronic appliances such as computers, radios, audio equipment, and televisions, and white goods are large home appliances such as cookers, refrigerators, freezers, washing machines, tumble driers, and air conditioners [13].…”