Chromium is a potentially toxic and carcinogenic metal originating from natural processes and anthropogenic activities such as the iron steel, electroplating and leather industries. Therefore, chromium should be removed from wastewater to avoid environmental pollution and to recycle chromium in the context of the future circular economy. Here we briefly review aqueous Cr species, their toxicity and methods to remove Cr such as membrane filtration, chemical precipitation, ion exchange, adsorption electrocoagulation, electrochemical reduction, electrodialysis, electrodeionization, photocatalysis and nanotechnology.

Removal of chromium from wastewater by membrane filtration, chemical precipitation, ion exchange, adsorption electrocoagulation, electrochemical reduction, electrodialysis, electrodeionization, photocatalysis and nanotechnology: a review

Biosorption of hexavalent chromium by microorganisms

Biosurfactant production from industrial wastes with potential remove of insoluble paint

This study evaluates the ability of biostimulation to enhance the bioremediation of soil contaminated with oily compounds as compared with natural attenuation. The soil was contaminated wit...

Bioremediation of soil contaminated with diesel and biodiesel fuel using biostimulation with microalgae biomass.

The critical utilization of active heterotrophic microalgae for bioremoval of Cr(VI) in organics co-contaminated wastewater.

O potencial de contaminacao de solos por vazamentos de oleos vem crescendo, devido a forte industrializacao e o desenvolvimento economico dos paises. Diante desse cenario, a biorremediacao tem se mostrado uma alternativa para remediar areas mediante uso de agentes biologicos. Dois micro-organismos, isolados de um efluente rico em lipidios, foram utilizadas nos ensaios de bioaumentacao em solos contaminados com oleo diesel, oleo lubrificante e oleo de soja. Ensaios de atenuacao natural foram realizados como controles. As remocoes do oleo diesel no tempo de 21 d foram de 18,5%, 7,30% e 11,38% respectivamente, para as tecnicas de bioaumento com os isolados I1 e I2 e atenuacao natural. As remocoes do oleo lubrificante foram de 41,6%, 14,16% e 6,91% respectivamente, para as tecnicas de bioaumento com os isolados I1 e I2 e atenuacao natural, enquanto que para o oleo de soja as remocoes foram de 87,8%, 73,9% e 49,4%. Considerando-se as tecnicas de bioaumento e atenuacao natural, o bioaumento com o isolado I1 apresentou melhores resultados, possivelmente devido a producao de compostos com capacidade de diminuicao da tensao superficial durante a fase de preparo do bioaumento.

Biorremediação de solos contaminados com resíduos oleosos através de bioaumentação e atenuação natural

Microalga biomass has been described worldwide according their capacity to realize biosorption of toxic metals. Chromium is one of the most toxic metals that could contaminate superficial and underground water. Considering the importance of Spirulina biomass in production of supplements for humans and for animal feed we assessed the biosorption of hexavalent chromium by living Spirulina platensis and its capacity to convert hexavalent chromium to trivalent chromium, less toxic, through its metabolism during growth. The active biomass was grown in Zarrouk medium diluted to 50% with distilled water, keeping the experiments under controlled conditions of aeration, temperature of 30°C and lighting of 1,800 lux. Hexavalent chromium was added using a potassium dichromate solution in fed-batch mode with the aim of evaluate the effect of several additions contaminant in the kinetic parameters of the culture. Cell growth was affected by the presence of chromium added at the beginning of cultures, and the best grow...

https://www.tandfonline.com/doi/pdf/10.1080/15226514.2014.964846

Potential of Live Spirulina platensis on Biosorption of Hexavalent Chromium and Its Conversion to Trivalent Chromium

The potential for soil contamination by oil spills is growing, due to heavy industrialization and economic development of countries. Due to this fact, the bioremediation has become an alternative to remediate areas through the use of biological agents. Two microorganisms, isolated from a lipid-rich effluent, were used in the bioaugmentation of soils contaminated with diesel oil, lubricating oil and soybean oil. Natural attenuation tests were conducted as controls. The removal of diesel fuel at the time of 21 d were of 18.5%, 7.30% and 11.38%, respectively, for the bioaugmentation with isolated I1 and I2 and natural attenuation. The removal of lubricating oil were 41.6%, 14.16% and 6.91% respectively for the DOI: 10.5433/1679-0375.2012v33n1p73 1 Acadêmicas do Curso de Engenharia Ambiental, Universidade de Passo Fundo; maitcarla@gmail.com, 2 Acadêmicas do Curso de Engenharia Ambiental, Universidade de Passo Fundo; deia_derossi@hotmail.com 3 Mestrando do Programa de Pós-Graduação em Engenharia, Universidade de Passo Fundo; clineidalmagro@gmail.com 4 Docente do Curso de Engenharia Ambiental, Universidade de Passo Fundo; reinehr@upf.br 5 Docente do Programa de Pós-Graduação em Engenharia, Universidade de Passo Fundo; *lmcolla@upf.br

Bioremediation of contaminated soil with oils residuals through bioaugmentation and natural attenuation.

The inappropriate disposal of effluents containing toxic metals in high concentrations is a serious problem for the environment, and hexavalent chromium has received attention due to its high toxicity The biosorption is a technology characterized as an alternative to remove these compounds from wastewater, due to lower material cost and lower operating costs of biosorbents The aim of this work was to evaluate the removal of hexavalent chromium of effluent by biosorption using agroindustrial wastes fermented with fungi of the genus Aspergillus The maximum hexavalent chromium removal was of 58%, using 2% biosorbent produced by solid state fermentation of soybean and rice husk using Aspergillus O-8 strain The biomass was submitted to heat treatment for sterilization and the initial concentration of hexavalent chromium in the medium was 120 mg/L This result can be optimized through the study of reaction conditions such as pH and agitation
Keywords: biosorption, rice husk, hexavalent chromium, fungi, soybean

Clinei Dal'Magro

Papers

Biorremediação de solos contaminados com resíduos oleosos através de bioaumentação e atenuação natural

Potential of Live Spirulina platensis on Biosorption of Hexavalent Chromium and Its Conversion to Trivalent Chromium

Bioremediation of contaminated soil with oils residuals through bioaugmentation and natural attenuation.

Biossorção de cromo hexavalente de efluente utilizando resíduos agroindustriais fermentados por cepas de aspergillus