scholarly journals SEMENTES DE Moringa oleífera Lam: EFICIÊNCIA NO USO DE COAGULANTE BIOLÓGICO NO TRATAMENTO DE ÁGUA COM TURBIDEZ, COMPARADO AO COAGULANTE QUÍMICO SULFATO DE ALUMÍNIO

2020 ◽  
Vol 9 (11) ◽  
pp. 1-18
Author(s):  
Maiara Luzia Grigoli OLIVIO ◽  
Elizângela Flávia Jacob ESTEVES ◽  
Dagmar Aparecida de Marco FERRO
Keyword(s):  
Water Treatment ◽  
Moringa Oleifera ◽  
Aluminum Sulfate ◽  
Low Cost ◽  
Turbid Water ◽  
Quality Of Water ◽  
Before And After ◽  
Natural Coagulants ◽  
Moringa Oleifera Lam

Comumente o sulfato de alumínio é o coagulante químico utilizado nas Estações de Tratamentos para a clarificação da água, embora produza um lodo tóxico de difícil deposição no ambiente. No entanto, os coagulantes naturais como sementes de Moringa oleífera Lam. têm demonstrado vantagens para tratamento em comparação aos químicos, pela simplicidade de uso e baixo custo. O estudo objetivou analisar a eficiência coagulante da semente de Moringa oleífera na clarificação de água com turbidez e comparar com os parâmetros do coagulante químico sulfato de alumínio. As amostras de água foram coletadas no Córrego Jacu Queimado e as sementes colhidas em um plantio da própria espécie. Foram realizados, em laboratório, etapas sequenciais do experimento: comparação da eficiência da semente verde e seca, determinação da concentração e tempo de exposição da semente à água, comparação de agitação manual e magnética entre elas e do coagulante biológico com o químico, sendo analisados os aspectos físico, químico e biológico antes e após a adição de ambos. Observou-se que apenas a semente seca realiza a clarificação da água em comparação com os resultados das análises da água clarificada com o sulfato, determinando-se que 5 sementes são eficazes para tratar 1 litro de água com turbidez de até 25,0 NTU, considerando-se mais relevante a agitação manual para o efeito de coagulação e o aguardo de 2 horas para o término da decantação. Conclui-se, que a semente de Moringa é um coagulante biológico que se apresenta como alternativa para o tratamento de água com turbidez, porém, ainda não é indicada para a potabilidade. É preciso dar continuidade ao tratamento em busca de processos que visam melhorar a qualidade da água para aproximar-se aos parâmetros aceitáveis para o consumo humano.   Moringa oleífera Lam SEEDS: EFFICIENT USE OF BIOLOGICAL COAGULANT FOR WATER TURBIDITY TREATMENT, COMPARED TO ALUMINUM SULFATE CHEMICAL COAGULANT   ABSTRACT Aluminum sulfate is a chemical coagulant commonly used at Water Treatment Plants for water clarification, although it produces a toxic sludge of difficult deposition in the environment. However, natural coagulants such as Moringa oleíferaLam seeds have evidenced the advantages for the treatment when compared to chemicals, due to either their simplicity in and low cost.  This research aims at reviewing the efficient use of   Moringa oleífera seeds as coagulants for turbid water clarification as well as comparing the parameters of aluminum sulfate chemical coagulants. The water samples were collected at Córrego Jacu Queimado and the seeds were harvested from a crop of its own species. Sequential steps were performed in the lab for this experiment: Comparison of green and dry seeds efficiency, concentration and time of exposition of the seed to water measurements, comparison of manual and magnetic stirring among them and among biological and chemical coagulants, being analyzed physical, chemical and biological aspects before and after adding both of them. It was observed that only the dry seed enables water clarification when comparing the analysis results to sulfate water clarification, it was ascertained that 5 seeds are efficient to treat a liter of 25,0 NTU turbidity in water, considering as more relevant manual stirring for coagulation effect after a two-hour rest for decantation completion. It was concluded that Moringa seed is a biological coagulant presented as an alternative for turbid water treatment, although it is not indicated for drinkability. Further treatment is necessary in order to keep searching for processes that target to improve the quality of water and meeting acceptable parameters for water consumption.   Keywords: Biological Coagulant. Chemical Coagulant. Efficiency. Water Clarification. Comparative Parameters.

scholarly journals Quality of water treated with Moringa oleifera Lam seeds

2020 ◽  
Vol 9 (4) ◽  
pp. e164943041
Author(s):  
Semirames do Nascimento Silva ◽  
Eliezer da Cunha Siqueira ◽  
Josivanda Palmeira Gomes ◽  
Roberta de Oliveira Sousa Wanderley ◽  
Polyana Barbosa Silva
Keyword(s):  
Escherichia Coli ◽  
Moringa Oleifera ◽  
E Coli ◽  
Quality Of Water ◽  
Moringa Oleifera Lam

O objetivo deste trabalho foi avaliar a qualidade química e microbiológica da água de cisternas antes e após o tratamento com sementes de Moringa ou leifera Lam. Como sementes de moringa usadas no trabalho foram compostas no município de Cajazeiras. O coagulante da moringa foi usado em meio aquoso. A água filtrada na obra veio de cisternas construídas no assentamento de Santo Antônio, município de Cajazeiras. A água utilizada foi analisada antes e após o tratamento.Uma análise dos parâmetros: pH, condutividade elétrica, alcalinidade total, provável resíduo e total de dissolvidos foi realizada no Laboratório de Água e Solo e no Laboratório de Microbiologia do Instituto Federal de Educação, Ciência e Tecnologia do Campus da Paraíba, análises de coliformes fecais e Escherichia coli foram mantidos. Todas as estatísticas de substâncias químicas mostram diferenças antes e depois do tratamento. Os controles C1 e C5 apresentam presença de Escherichia coli , os demais são causados pela E. coli .

scholarly journals Reduction of Turbidity of Water Using Locally Available Natural Coagulants

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Md. Asrafuzzaman ◽  
A. N. M. Fakhruddin ◽  
Md. Alamgir Hossain
Keyword(s):  
Water Treatment ◽  
Cicer Arietinum ◽  
Moringa Oleifera ◽  
Total Coliform ◽  
Water Soluble ◽  
Turbid Water ◽  
Environment Friendly ◽  
Dolichos Lablab ◽  
Jar Test ◽  
Natural Coagulants

Turbidity imparts a great problem in water treatment. Moringa oleifera, Cicer arietinum, and Dolichos lablab were used as locally available natural coagulants in this study to reduce turbidity of synthetic water. The tests were carried out, using artificial turbid water with conventional jar test apparatus. Optimum mixing intensity and duration were determined. After dosing water-soluble extracts of Moringa oleifera, Cicer arietinum, and Dolichos lablab reduced turbidity to 5.9, 3.9, and 11.1 nephelometric turbidity unit (NTU), respectively, from 100 NTU and 5, 3.3, and 9.5, NTU, respectively, after dosing and filtration. Natural coagulants worked better with high, turbid, water compare to medium, or low, turbid, water. Highest turbidity reduction efficiency (95.89%) was found with Cicer arietinum. About 89 to 96% total coliform reduction were also found with natural coagulant treatment of turbid water. Using locally available natural coagulants, suitable, easier, and environment friendly options for water treatment were observed.

scholarly journals Laboratory Evaluations of Correction Equations with Multiple Choices for Seed Low-Cost Particle Sensing Devices in Sensor Networks

Sensors ◽  
2020 ◽  
Vol 20 (13) ◽  
pp. 3661 ◽  
Author(s):  
Wen-Cheng Vincent Wang ◽  
Shih-Chun Candice Lung ◽  
Chun Hu Liu ◽  
Chen-Kai Shui
Keyword(s):  
Sensor Networks ◽  
Low Cost ◽  
Before And After ◽  
Sensor Signals ◽  
Research Grade ◽  
Areas Of Interest ◽  
Equivalent Method ◽  
Correction Equations ◽  
Practical Recommendations

To tackle the challenge of the data accuracy issues of low-cost sensors (LCSs), the objective of this work was to obtain robust correction equations to convert LCS signals into data comparable to that of research-grade instruments using side-by-side comparisons. Limited sets of seed LCS devices, after laboratory evaluations, can be installed strategically in areas of interest without official monitoring stations to enable reading adjustments of other uncalibrated LCS devices to enhance the data quality of sensor networks. The robustness of these equations for LCS devices (AS-LUNG with PMS3003 sensor) under a hood and a chamber with two different burnt materials and before and after 1.5 years of field campaigns were evaluated. Correction equations with incense or mosquito coils burning inside a chamber with segmented regressions had a high R2 of 0.999, less than 6.0% variability in the slopes, and a mean RMSE of 1.18 µg/m3 for 0.1–200 µg/m3 of PM2.5, with a slightly higher RMSE for 0.1–400 µg/m3 compared to EDM-180. Similar results were obtained for PM1, with an upper limit of 200 µg/m3. Sensor signals drifted 19–24% after 1.5 years in the field. Practical recommendations are given to obtain equations for Federal-Equivalent-Method-comparable measurements considering variability and cost.

scholarly journals Evaluation of extracts of Moringa oleifera Lam seeds obtained with NaCl and their effects on water treatment

2012 ◽  
Vol 34 (3) ◽  
Author(s):  
Grasiele Scaramal Madrona ◽  
Ivanise Guilherme Branco ◽  
Vanessa Jurca Seolin ◽  
Benicio De Abreu Alves Filho ◽  
Marcia Regina Fagundes-Klen ◽  
...  
Keyword(s):  
Water Treatment ◽  
Moringa Oleifera ◽  
Moringa Oleifera Lam

Modified Moringa oleifera Lam. Seed husks as low-cost biosorbent for atrazine removal

2019 ◽  
pp. 1-12 ◽  
Author(s):  
Luís Fernando Cusioli ◽  
Charleston de Oliveira Bezerra ◽  
Heloise Beatriz Quesada ◽  
Aline Takaoka Alves Baptista ◽  
Letícia Nishi ◽  
...  
Keyword(s):  
Moringa Oleifera ◽  
Low Cost ◽  
Moringa Oleifera Lam

Extraction of natural coagulants from Maerua subcordata and Moringa stenopetala for use in turbid water treatment

2016 ◽  
Vol 59 ◽  
pp. 127-134 ◽  
Author(s):  
Moa Megersa ◽  
Abebe Beyene ◽  
Argaw Ambelu ◽  
Ludwig Triest
Keyword(s):  
Water Treatment ◽  
Turbid Water ◽  
Moringa Stenopetala ◽  
Natural Coagulants

scholarly journals Applicability of Moringa oleifera Lam. pie as an adsorbent for removal of heavy metals from waters

2013 ◽  
Vol 17 (1) ◽  
pp. 94-99 ◽  
Author(s):  
Affonso C. Gonçalves Junior ◽  
Ana P. Meneghel ◽  
Fernanda Rubio ◽  
Leonardo Strey ◽  
Douglas C. Dragunski ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Moringa Oleifera ◽  
Low Cost ◽  
Previous Treatment ◽  
Toxic Heavy Metals ◽  
Removal Of Heavy Metals ◽  
Alternative Material ◽  
Cadmium Lead ◽  
Optimized Conditions ◽  
Moringa Oleifera Lam

This study evaluated the efficacy of moringa seeds (Moringa oleifera Lam.) as an adsorbent material for removing toxic heavy metals such as cadmium, lead, and chromium from contaminated solutions. The effect of the adsorbent mass was investigated at two pH conditions (5.0 and 7.0). The optimized conditions were 0.300 g of adsorbent at pH 5.0, used for the isotherms construction, and linearized according to Langmuir and Freundlich models. Results showed that cadmium adsorption was similar in both the models used. For lead, the Freundlich model had the best adjustment and chromium was better adjusted by the Langmuir model. It was concluded that the adsorbent was effective in the remediation of solutions containing cadmium, lead and chromium, thus, its use as sustainable alternative material is feasible, since it has low cost, does not need a previous treatment and it is a byproduct.

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