RESUMO
The air pollution due to anthropogenic activities seriously affected human life, vegetation, and heritage as well. The vegetation cover in and around the city mitigates the air pollution by acting as a sink for pollution. An attempt was made to evaluate biochemical changes occurred in four selected plant species, namely Azadirachta indica, Mangifera indica, Delonix regia, and Cassia fistula of residential, commercial, and industrial areas of Nagpur city in India. It was observed that the correlated values of air pollutants and plant leaves characteristics alter foliar biochemical features (i.e., chlorophyll and ascorbic acid content, pH and relative water content) of plants due to air pollution. The changes in air pollution tolerance index of plants was also estimated which revealed that these plants can be used as a biomarker of air pollution.
Assuntos
Poluentes Atmosféricos/toxicidade , Monitoramento Ambiental/métodos , Folhas de Planta/metabolismo , Poluentes Atmosféricos/análise , Poluentes Atmosféricos/metabolismo , Ácido Ascórbico/metabolismo , Azadirachta/efeitos dos fármacos , Azadirachta/metabolismo , Biomarcadores/metabolismo , Cassia/efeitos dos fármacos , Cassia/metabolismo , Clorofila/metabolismo , Fabaceae/efeitos dos fármacos , Fabaceae/metabolismo , Índia , Mangifera/efeitos dos fármacos , Mangifera/metabolismo , Dióxido de Nitrogênio/análise , Dióxido de Nitrogênio/metabolismo , Dióxido de Nitrogênio/toxicidade , Folhas de Planta/efeitos dos fármacos , Dióxido de Enxofre/análise , Dióxido de Enxofre/metabolismo , Dióxido de Enxofre/toxicidadeRESUMO
An important goal of ecological rehabilitation is to accelerate natural successional processes to increase biological productivity, soil fertility and biotic control over biogeochemical fluxes within the recovering ecosystems. A new approach called Microbe Assisted Green Technology (MAGT) is an integrated biotechnological approach developed at National Environmental Engineering Research Institute (NEERI) through exhaustive laboratory as well as field studies and serve as a model for land reclamation and development of lush green vegetation on mine overburdens. One year old seedlings of native tree species were planted on 6.3 ha area of manganese mine overburden at Gumgaon under Manganese Ore India Ltd., Maharashtra, India. Continuous efforts resulted in nutrient rich soil with high N, P, K and organic carbon; well developed biodiversity, including bacteria, fungi, higher plants (more than 350 species) and different classes of animals. Planted trees accumulated 698 t ha( - 1) above ground biomass and 143 t ha( - 1) below ground mass. This was achieved in 18 years by MAGT, which otherwise takes hundreds of years.
Assuntos
Recuperação e Remediação Ambiental/métodos , Resíduos Industriais/análise , Mineração , Microbiologia do Solo , Solo , Bactérias/crescimento & desenvolvimento , Biodegradação Ambiental , Carbono/análise , Fungos/crescimento & desenvolvimento , Cinética , Nitrogênio/análise , Fósforo/análise , Avaliação de Programas e Projetos de Saúde , Plântula/crescimento & desenvolvimento , Solo/análise , Poluentes do Solo/análise , Árvores/crescimento & desenvolvimentoRESUMO
The aims of the study were to evaluate the effect of organic wastes (biosludge and dairy sludge) and biofertilizer (Azotobacter chroococcum) on the planting conditions of Jatropha curcas in metal contaminated soils. Results showed that the plants survival rate in heavy metal contaminated soil increased with addition of amendments. Treatment T6 (heavy metal contaminated soils+dairy sludge+biofertilizer) observed to be the best treatment for growth (height and biomass) as compared with the treatment T5 (heavy metal contaminated soils+biosludge+biofertilizer). In addition, organic amendments provided nutrients such as carbon, N, P and K to support plant growth and reduced the metal toxicity to plant. The present study showed that metal contaminated lands/soils could be suitably remediated by adapting appropriate measures.
