About Chromates

Chromate Ion

Chromate salts contain the anion CrO42-, while dichromate salts contain the dichromate anion, Cr2O72-. Both classes of compounds contain chromium in the oxidation state +6--hexavalent chromium--and act as strong oxidizing agents. Water soluble chromates are frequently used in chrome electroplating processes used to protect underlying metals from corrosion or improve paint adhesion. Chromate conversion coating, a process which uses oxidants to passivate certain metal alloy surfaces, may utilize chromate derived from chromic acid. Non-soluble chromates have strong colors and have been used as pigments. Because hexavalent chromium is now known to be toxic, chromate waste disposal is regulated and chromate usage is declining in areas where there are suitable substitutes. In particular, chromium pigments such as chrome yellow, widely recognized as the color of American school buses, have largely fallen out of use in favor of safer pigment compounds.

Recent Research & Development for Chromates

Density functional theory modeling of chromate adsorption onto ferrihydrite nanoparticles., Kubicki, James D., Kabengi Nadine, Chrysochoou Maria, and Bompoti Nefeli , Geochem Trans, 2018 Mar 01, Volume 19, Issue 1, p.8, (2018)

The effect of electron competition on chromate reduction using methane as electron donor., Lv, Pan-Long, Zhong Liang, Dong Qiu-Yi, Yang Shi-Lei, Shen Wei-Wei, Zhu Quan-Song, Lai Chun-Yu, Luo An-Cheng, Tang Youneng, and Zhao He-Ping , Environ Sci Pollut Res Int, 2018 Mar, Volume 25, Issue 7, p.6609-6618, (2018)

Prolonged exposure to particulate chromate inhibits RAD51 nuclear import mediator proteins., Browning, Cynthia L., and Wise John Pierce , Toxicol Appl Pharmacol, 2017 Sep 15, Volume 331, p.101-107, (2017)

Prolonged particulate chromate exposure does not inhibit homologous recombination repair in North Atlantic right whale (Eubalaena glacialis) lung cells., Browning, Cynthia L., Wise Catherine F., and Wise John Pierce , Toxicol Appl Pharmacol, 2017 Sep 15, Volume 331, p.18-23, (2017)

Reductive solidification/stabilization of chromate in municipal solid waste incineration fly ash by ascorbic acid and blast furnace slag., Zhou, Xian, Zhou Min, Wu Xian, Han Yi, Geng Junjun, Wang Teng, Wan Sha, and Hou Haobo , Chemosphere, 2017 Sep, Volume 182, p.76-84, (2017)

Applying a modified Donnan model to describe the surface complexation of chromate to iron oxyhydroxide agglomerates with heteromorphous pores., Wei, Zongsu, and Semiat Raphael , J Colloid Interface Sci, 2017 Nov 15, Volume 506, p.66-75, (2017)

Accelerated redox reaction between chromate and phenolic pollutants during freezing., Ju, Jinjung, Kim Jaesung, Vetráková Ľubica, Seo Jiwon, Heger Dominik, Lee Changha, Yoon Ho-Il, Kim Kitae, and Kim Jungwon , J Hazard Mater, 2017 May 05, Volume 329, p.330-338, (2017)

Characterisation of the rare cadmium chromate pigment in a 19th century tube colour by Raman, FTIR, X-ray and EPR., Christiansen, Marie Bitsch, Sørensen Mikkel Agerbæk, Sanyova Jana, Bendix Jesper, and Simonsen Kim Pilkjær , Spectrochim Acta A Mol Biomol Spectrosc, 2017 Mar 15, Volume 175, p.208-214, (2017)

Mechanochemical and Conventional Synthesis of Zn(II)/Cd(II) Luminescent Coordination Polymers: Dual Sensing Probe for Selective Detection of Chromate Anions and TNP in Aqueous Phase., Parmar, Bhavesh, Rachuri Yadagiri, Bisht Kamal Kumar, Laiya Ridhdhi, and Suresh Eringathodi , Inorg Chem, 2017 Mar 06, Volume 56, Issue 5, p.2627-2638, (2017)

Ba19Cr12O45: A High Pressure Chromate with an Original Structure Solved by Electron Diffraction Tomography and Powder X-ray Diffraction., Lepoittevin, Christophe, Jeanneau Justin, Toulemonde Pierre, Sulpice André, and Núñez-Regueiro Manuel , Inorg Chem, 2017 Jun 05, Volume 56, Issue 11, p.6404-6409, (2017)

[Effects on human peripheral erythrocytes of long-term occupational contact with chromate]., Hu, G P., Zhao L, Liu J X., Wang L L., Chen Z J., Zhang Y M., Wang L, Zhao Z C., Yu S F., and Jia G , Zhonghua Yu Fang Yi Xue Za Zhi, 2017 Jan 06, Volume 51, Issue 1, p.41-46, (2017)

The MOF+ Technique: A Significant Synergic Effect Enables High Performance Chromate Removal., Luo, Ming Biao, Xiong Yang Yang, Wu Hui Qiong, Feng Xue Feng, Li Jian Qiang, and Luo Feng , Angew Chem Int Ed Engl, 2017 Dec 18, Volume 56, Issue 51, p.16376-16379, (2017)

Experimental and Theoretical Studies on the Adsorption and Desorption Mechanisms of Chromate Ions on Cross-Linked Chitosan., Mishima, Kenji, Du Xiaoyu, Sekiguchi Shunsuke, and Kano Naoki , J Funct Biomater, 2017 Dec 14, Volume 8, Issue 4, (2017)

Ab Initio Computational Study of Chromate Molecular Anion Adsorption on the Surfaces of Pristine and B- or N-Doped Carbon Nanotubes and Graphene., Hizhnyi, Yuriy, Nedilko, ii Serg, Borysiuk Viktor, and Shyichuk, ii Andr , Nanoscale Res Lett, 2017 Dec, Volume 12, Issue 1, p.71, (2017)