Biotreatment potential of Co-contaminants hexavalent chromium and polychlorinated biphenyls in industrial wastewater: Individual and simultaneous prospects

2021 ◽  
pp. 146345
Author(s):  
Muhammad Wahab Yasir ◽  
Muhammad Bashir Ahmed Siddique ◽  
Zunera Shabbir ◽  
Habib Ullah ◽  
Luqman Riaz ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Hexavalent Chromium ◽  
Industrial Wastewater

Simultaneous biotreatment of hexavalent chromium Cr(VI) and polychlorinated biphenyls (PCBs) by indigenous bacteria of Co-polluted wastewater

2021 ◽  
Vol 161 ◽  
pp. 105249
Author(s):  
Muhammad Wahab Yasir ◽  
Staci L. Capozzi ◽  
Birthe Veno Kjellerup ◽  
Shahid Mahmood ◽  
Tariq Mahmood ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Hexavalent Chromium ◽  
Indigenous Bacteria ◽  
Polluted Wastewater

Removal of hexavalent chromium from industrial wastewater by electrocoagulation: A comprehensive comparison of aluminium and iron electrodes

2009 ◽  
Vol 66 (1) ◽  
pp. 159-166 ◽  
Author(s):  
Inoussa Zongo ◽  
Jean-Pierre Leclerc ◽  
Hama Amadou Maïga ◽  
Joseph Wéthé ◽  
Francois Lapicque
Keyword(s):  
Hexavalent Chromium ◽  
Industrial Wastewater ◽  
Iron Electrodes ◽  
Comprehensive Comparison

Utilization of solar energy for photoreduction of industrial wastewater containing hexavalent chromium with zinc oxide semiconductor catalyst

2013 ◽  
Vol 51 (28-30) ◽  
pp. 5451-5459 ◽  
Author(s):  
Pallavi Mitra ◽  
Prantik Banerjee ◽  
Sampa Chakrabarti ◽  
Sekhar Bhattacharjee
Keyword(s):  
Zinc Oxide ◽  
Solar Energy ◽  
Hexavalent Chromium ◽  
Industrial Wastewater ◽  
Oxide Semiconductor

Removal of Hexavalent Chromium in Industrial Wastewater Using Poly[Allylamine-(N,N-Dimethylacrylamide)] Grafted onto Magnetic Nanoparticles

2015 ◽  
Vol 36 (3) ◽  
pp. 371-377 ◽  
Author(s):  
Iman Khonsha ◽  
Amir Heidarinasab ◽  
Elham Moniri ◽  
Homayon Ahmadpanahi
Keyword(s):  
Magnetic Nanoparticles ◽  
Hexavalent Chromium ◽  
Industrial Wastewater

Analysis of Persistent Organic Pollutants in Sediments of the Wanzhou Section of the Yangtze River

2012 ◽  
Vol 518-523 ◽  
pp. 2352-2355
Author(s):  
Jun Sheng Qi ◽  
Yu Ling Wang ◽  
Chuan Fu ◽  
Kun Xie
Keyword(s):  
Polychlorinated Biphenyls ◽  
Organochlorine Pesticides ◽  
Industrial Wastewater ◽  
Yangtze River ◽  
River Sediment ◽  
Water Environment ◽  
The Yangtze River ◽  
Point Source Pollution ◽  
The Impact ◽  
Direct Discharge

Organochlorine pesticides and polychlorinated biphenyls content can be obtained By measuring Wanzhou of the Yangtze River and Wanzhou Zhuxi River in sediment : Sediment content of organochlorine pesticides and polychlorinated biphenyls are increased the river down. Organochlorine pesticides in sediments are β-HCH> δ-HCH> α-HCH> γ-HCH, and pp'-DDE> pp '-DDD> op'-DDT> pp'-DDT. Organochlorine pesticides and PCBs of Wanzhou of the Yangtze River sediment in the distribution of the sampling points are similar characteristics. The main source of pollution is the direct discharge of industrial wastewater, agricultural pollution and soil erosion of farmland. Although OCPs and PCBs in water environment are very low, the impact on human health can not be ignored. Therefore certain measures are taken to clean emissions from industrial wastewater and agricultural non-point source pollution control.

scholarly journals Use of Thermally Modified Jarosite for the Removal of Hexavalent Chromium by Adsorption

Crystals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 80
Author(s):  
N. G. Picazo-Rodríguez ◽  
F. R. Carrillo-Pedroza ◽  
Ma de Jesús Soria-Aguilar ◽  
Gabriela Baltierra ◽  
Gregorio González ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Industrial Wastewater ◽  
Adsorption Process ◽  
Order Kinetic ◽  
Heat Treated Sample ◽  
Heat Treated ◽  
Treated Sample ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Positively Charged

Jarosites are residues generated during the purification of zinc and are composed mainly of iron sulfates ((Na, K)Fe3(SO4)2(OH)6). Due to the large volume of jarosite generated during the process, these residues tend to be deposited in large land areas and are not used. In the present work, jarosite was used without heat treatment (JST) as an adsorbent of hexavalent chromium contained in a sample of wastewater from a chrome plating industry under the following conditions: C0 = 200 mg/L of Cr, T = 25 °C, and pH = 3. It was only possible to remove 34% of Cr (VI). Subsequently, a thermal treatment of a jarosite sample (JTT) was carried out at 600 °C. The heat-treated sample was later used as an adsorbent in the same conditions as those for JST. The maximum chromium removal was 53%, and the adsorption capacity was 10.99 mg/g. The experimental data were fitted to the Langmuir model and to the pseudo-second-order kinetic model. It was determined that the adsorption process involved electrostatic attractions between the surface of the positively charged adsorbent and the chromium anions contained in industrial wastewater.

Removal of hexavalent chromium from aqueous solutions using micro zero-valent iron supported by bentonite layer

2014 ◽  
Vol 71 (5) ◽  
pp. 667-674 ◽  
Author(s):  
Waseem Daoud ◽  
Taghi Ebadi ◽  
Ahmad Fahimifar
Keyword(s):  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Industrial Wastewater ◽  
Environmental Concern ◽  
Low Ph ◽  
Permeable Reactive Barriers ◽  
Zero Valent Iron ◽  
Contaminated Groundwater ◽  
Aquatic Environments ◽  
Insoluble Compounds

Hexavalent chromium Cr(VI) is of particular environmental concern due to its toxicity, mobility, and challenging removal from industrial wastewater. It is a strong oxidizing agent that is carcinogenic and mutagenic and diffuses quickly through soil and aquatic environments. Moreover, it does not form insoluble compounds in aqueous solutions; therefore, separation by precipitation is not feasible. While Cr(VI) oxyanions are very mobile and toxic in the environment, trivalent Cr(III) cations are the opposite and, like many metal cations, Cr(III) forms insoluble precipitates. Thus, reducing Cr(VI)–Cr(III) simplifies its removal from effluent and also reduces its toxicity and mobility. Permeable reactive barriers (PRBs) with zero-valent iron (ZVI) have been used to remediate contaminated groundwater with metals, but using ZVI in remediation of contaminated groundwater or wastewater is limited due to its lack of stability, easy aggregation, and difficulty in separation of iron from the treated solution. Thus, the technology used in the present study is developed to address these problems by placing a layer of bentonite after the PRB layer to remove iron from the treated water. The removal rates of Cr(VI) under different values of pH were investigated, and the results indicated the highest adsorption capacity at low pH.

Evaluation of Consortia of Microorganisms for Efficient Removal of Hexavalent Chromium from Industrial Wastewater

2009 ◽  
Vol 82 (5) ◽  
pp. 597-600 ◽  
Author(s):  
Bushra Muneer ◽  
Abdul Rehman ◽  
Farah R. Shakoori ◽  
Abdul R. Shakoori
Keyword(s):  
Hexavalent Chromium ◽  
Industrial Wastewater ◽  
Efficient Removal
Sign in / Sign up

Export Citation Format

Share Document