Interaction between Diethyldithiocarbamate and Cu(II) on Gold in Non-Cyanide Wastewater

Abstract

A surface-enhanced Raman scattering (SERS) detection method for environmental copper ions (Cu2+) was developed according to the vibrational spectral change of diethyldithiocarbamate (DDTC) on gold nanoparticles (AuNPs). The ultraviolet-visible (UV-Vis) absorption spectra indicated that DDTC formed a complex with Cu2+, showing a prominent peak at ~450 nm. We found Raman spectral changes in DDTC from ~1490 cm−1 to ~1504 cm−1 on AuNPs at a high concentration of Cu2+ above 1 μM. The other ions of Zn2+, Pb2+, Ni2+, NH4+, Mn2+, Mg2+, K+, Hg2+, Fe2+, Fe3+, Cr3+, Co2+, Cd2+, and Ca2+ did not produce such spectral changes, even after they reacted with DDTC. The electroplating industrial wastewater samples were tested under the interference of highly concentrated ions of Fe3+, Ni2+, and Zn2+. The Raman spectroscopy-based quantification of Cu2+ ions was able to be achieved for the wastewater after treatment with alkaline chlorination, whereas the cyanide-containing water did not show any spectral changes, due to the complexation of the cyanide with the Cu2+ ions. A micromolar range detection limit of Cu2+ ions could be achieved by analyzing the Raman spectra of DDTC in the cyanide-removed water.

On‐Site Detection for Hazardous Materials in Chemical Accidents

“…30 Review BULLETIN OF THE KOREAN CHEMICAL SOCIETY on the aromatic ligands. [81][82][83] As one of the important industrial chemicals, BTX hydrocarbons including benzene, toluene, and xylene are hazardous aromatic organic vapors and used in various fields but are high toxicity toward living organisms. Developing a convenient detection device for BTX hydrocarbons is significant.…”

“…In the last decade, plasmonic metalssuch as gold, silver, and platinum-have brought a disruptive breakthrough in analytical technologies due their unique optical properties that respond to specific applications as well as biology, 98,99 food, 100 and environments. 82,83,101,102 Since the electron density of plasmonic 35 Reproduced with permission. 35 Review BULLETIN OF THE KOREAN CHEMICAL SOCIETY metal nanoparticles can couple with electromagnetic radiation of wavelengths, there is a series of study on the application of plasmonic metal nanoparticle-based sensor platform that gives the potential of the sensor systems in practical applications as rapid assessment of water toxicity, 23 miniaturized optical and chemical sensors.…”

“…Surface enhanced Raman scattering was also used to detect the hazardous species based on the aromatic ligands 81‐83 . As one of the important industrial chemicals, BTX hydrocarbons including benzene, toluene, and xylene are hazardous aromatic organic vapors and used in various fields but are high toxicity toward living organisms.…”

“…(c) Recent developments in the field of heavy metals ions (Cu 2+ and Hg 2+ ) detection using AuNPs and surfaceenhanced Raman scattering. Reproduced with permission 77,[81][82][83].…”

Hand-Held Photometer for Instant On-Spot Quantification of Nucleic Acids, Proteins, and Cells

“…In recent years, the rising demand for in situ monitoring of biological, chemical, and environmental samples has increased the need for miniaturized photometric sensing devices. − Examples of research into in situ photometric sensing include point of care devices using smart phones , and environmental detection. , With the development of optoelectronics and light emitting diode (LED) technology, portable and low-power consumption devices with wireless communication capabilities are appearing in the market. , After the first LED based optical sensor was proposed by Flaschka et al, LEDs have played an important role in analytical devices. − Meanwhile, miniaturized devices have become a trend in analytical chemistry with the combination of different platforms such as microfluidics and liquid-core waveguide (LCW).…”