National Cheng-kung University

Juu-En Chang

Hung-Ta Chen

Hsing-I Hsiang

Min-Shing Tsai

Jun-Yi Wu

You-Shen Chen

Chang-Ting Yang

Tsair-Fuh Lin

Jui-Huan Tu

Ting-Che Hsiao

This present invention relates to a method of synthesizing copper selenide powder by using a hot-injection method wherein a proper amount of a reducing agent is added to a mixed solution made of copper cationic solution and selenium anionic solution, and the mixed solution is maintained at a temperature of 230&#xb0; C. for 40 minutes to obtain Copper Selenide powder. The Copper selenide powder, which is in the form of CuSe or CuSe, can be synthesized by adjusting the amount of the reducing agent being added to the mixed solution.

Method of synthesizing copper selenide powder

This invention offers an integrated technology in sequential treatment of wastewater. Low biodegradable organics and heavy metal ions are both contained in wastewater from surface finishing processes. The aim of the invention is to find the solution for treatment of organics and heavy metal ions in complicated wastewater that contains organics and heavy metal ions sequentially. Low biodegradable organics are oxidized by a fenton process with pH ranging from 2 to 5 and temperature ranging from 20&#xb0; C. to 100&#xb0; C. Heavy metal ions are then treated by a ferrite process with pH ranging from 8 to 12 and temperature ranging from 20&#xb0; C. to 100&#xb0; C. The integrated technology of the fenton process and the ferrite process (2FP) is advantageous to treat the wastewater from surface finishing processes, decrease the production of iron sludge caused in the fenton process and increase the quality of ferrite products.

Integrated technology in sequential treatment of organics and heavy metal ions wastewater

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Tainan, Taiwan

Juu-En Chang