scholarly journals Profiling and Characterization of Environmental Quality of Leachates from Selected Dumpsites in Owerri, Imo State, Nigeria

2021 ◽  
pp. 51-58
Author(s):  
J. K. Okere ◽  
J. N. Azorji ◽  
P.O, Nzenwa ◽  
E.U, Enenebeaku ◽  
S. K. Iheagwam
Keyword(s):  
Environmental Quality ◽  
Sampling Site ◽  
Sample Collection ◽  
Imo State ◽  
Lead And Cadmium ◽  
Nickel Chromium ◽  
Sulphate Chloride ◽  
Total Dissolved Solid ◽  
Physical And Chemical

This study profiled and characterized environmental quality of selected dumpsite leachates in Imo State with emphasis on Nekede, Worldbank, Irete and Orji areas of the state. Leachates were collected under stringent sample collection protocols from the selected dumpsites and analyzed. Samples were collected from three different sampling points of the dumpsite and bulked to form representative sample for each sampling site. The samples were analyzed for a number of standard physical and chemical parameters using standard analytical protocols and compared with the Federal Ministry of Environment (FMENV) benchmark. The result of the analysis showed that the values of electrical conductivity, total dissolved solid, temperature, BOD, COD, CO, salinity, sulphate, chloride, turbidity, nickel, chromium, lead, and cadmium were above FMENV limit; while nitrate, sulphate and zinc (from Worldbank, Irete and Orji), were below FMENV detectable limit. The outcome of the study is a pointer to the fact that the assayed leachates have high pollution potentials. There is possibility of gradual buildup of contaminants in the study area’s dumpsites, which could pose a serious threat, including the inhabitants around the vicinity. The study underscores the need for continual monitoring of the dumpsite leachates, and possibly an upgrade to a sustainable engineered landfill, to forestall possible pollution problems of other components of the environment such as aquatic bodies in future.

scholarly journals Environmental quality evaluation of lakes in the Rio Grande do Sul coastal plain

2007 ◽  
Vol 50 (4) ◽  
pp. 673-685 ◽  
Author(s):  
Catarina da Silva Pedrozo ◽  
Odete Rocha
Keyword(s):  
Environmental Quality ◽  
Sewage Treatment ◽  
Principal Component ◽  
Organic Pollution ◽  
Physical And Chemical Variables ◽  
Environmental Element ◽  
Different Characteristics ◽  
Physical And Chemical ◽  
The Town

The purpose of the present work was to evaluate the environmental quality of Marcelino, Pinguela, Peixoto, Palmital, Malvas and Do Passo lakes, interconnected by canals and located in the district of Osório, RS. In this context, 29 physical and chemical variables were analyzed with sampling carried out in January, May, July and October 1997 to verify the environmental quality of the system and the existence of a gradient of quality. Canonical Analysis was applied to the data of all environmental variables measured, and showed that the lakes had different characteristics as a consequence of the organic pollution received. Marcelino lake received continuous input of organic matter from the sewage treatment works in the town of Osório, whereas Peixoto, Pinguela, Palmital, Malvas and Do Passo lakes resembled other water bodies described in the region, not showing, so far, signs of degradation caused by the input of effluents. Principal Component Analysis selected environmental element were directly linked to organic pollution, that reflected sequential non-recent effects of contamination.

scholarly journals The Effect of Coating as Antifungi of Harumanis Mango's Post Harvest Losses

2020 ◽  
Vol 1 (2) ◽  
pp. 7-16
Author(s):  
Winda Amilia ◽  
Andrew Setiawan Rusdianto ◽  
Arma Dwi Novemi
Keyword(s):  
Corn Starch ◽  
Chemical Properties ◽  
Inhibition Zone ◽  
Post Harvest ◽  
Physical Chemical ◽  
Chemical Content ◽  
Total Dissolved Solid ◽  
Tobacco Extract ◽  
Physical And Chemical

The amount of mango production in Indonesia is quite high, but the quality of postharvest mangoes is still quite low. The quality of the fruit will decline due to contamination; one of the contaminants is fungi. The way to reduce the damage of postharvest products is by coating applications. The purpose of this study was to study the physical, chemical and antifungal activities of harumanis mangoes’s quality which had been given coating during storage that could cause postharvest losses of harumanis mangoes. There are 3 treatments, each of them are respectively the provision of corn based coating  6% tobacco extract, 8% tobacco extract and 10% tobacco extract. The physical and chemical properties of the antifungal coating of tobacco extract made from corn coating for post-harvest damage on harumanis mangoes were obtained by weight loss, texture, colour, respiration rate, vitamin C and total dissolved solid. Preventing coating can prevent damage after harvest and protect the harumanis mango; therefore the quality of the mangoes can be maintained. The best results from the priority with the largest diameter inhibition zone were given corn starch 10% tobacco extract. Then the higher the concentration of extract used, the greater the diameter of the inhibition zone obtained. Based on all the tests performed (physical, chemical, and antifungal) the best treatment from the treatment was obtained that consisted of mangoes with antifungal layers of corn starch 10% tobacco extract. Because the P3 obtained the best results in maintaining physical, chemical content and fungi for 15 days.

scholarly journals Some aspects of the ecology of freshwater algae in the Densu River and two tributaries in Southern Ghana

2014 ◽  
Vol 3 (2) ◽  
pp. 246-257 ◽  
Author(s):  
Ted Y Annang ◽  
RD Yirenya-Tawiah ◽  
GC Clerk ◽  
Thomas Smith
Keyword(s):  
River Water ◽  
Sampling Site ◽  
Freshwater Algae ◽  
Sample Collection ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Physical And Chemical Parameters ◽  
Chemical Conditions ◽  
Physical And Chemical ◽  
Southern Ghana

Studies on the composition and abundance of the phytoplankton in River Densu and two of its tributaries, Rivers Adeiso and Nsakir were carried out at ten sampling sites, including seven from different regions of the river basin namely Afuaman, Akwadum, Densuso, Manhean, Machigeni, Nsawam and Weija, as well as Adeisoand Pokuase. Sampling was done monthly at each sampling site from January to December, 2006. Physical and chemical parameters of river water were studied. The parameters of the river water varied with the sampling sites and the time of the year. Water samples for phytoplankton identification and enumeration were collected at each sampling site. Physico-chemical conditions of the river were assessed during sample collection or in the laboratory. Correlation analysis showed that there was a positive correlation between algal genera and the measured physical and chemical parameters of the river water. DOI: http://dx.doi.org/10.3126/ije.v3i2.10637 International Journal of the Environment Vol.3(2) 2014: 246-257

Viability of Tumpaan-strained rotifers, Brachionus rotundiformis, at different salinities

2014 ◽  
Vol 2 (1) ◽  
pp. 12
Author(s):  
Asy'ari Asy'ari ◽  
Erly Kaligis ◽  
Stenly Wullur ◽  
Joice Rimper
Keyword(s):  
Water Quality ◽  
Sampling Site ◽  
Quality Parameters ◽  
Sample Collection ◽  
Collection Site ◽  
Wastewater Disposal ◽  
Brachionus Rotundiformis ◽  
Household Wastewater ◽  
Reclamation Plan

Title (Bahasa Indonesia): Viabilitas rotifer Brachionus rotundiformis strain tumpaan pada salinitas berbeda The purpose of the research was to analyze the viability of eggs of Tumpaan-strained rotifer, Brachionus rotundiformis, at different salinities (10 and 20 ppt). Rotifer collection was done in the area of reclamation plan and household wastewater disposal located in the coastal village of Tumpaan 1, South Minahasa Regency. At the time of sample collection, water quality parameters of the sampling site were also measured. After multiplication through clone culture in the salinity of 10 ppt and 20 ppt, the viability of the rotifer was then tested by daily observing the number of live rotifers, the number of eggs carried and the number of youngsters produced. The data were then calculated using the life table method. Results showed that water quality of the rotifer collection site is suitable for the rotifer to live. The rotifers held in 10 ppt salinity had higher survivorship and population growth (fertility rate and Ro) than those in 20 ppt salinity. This reflects that beside the quality of feed, rotifer growth is affected by salinity as well. Tujuan penelitian ini untuk menganalisis viabilitas tetasan telur dari rotifer Brachionus rotundi-formis strain Tumpaan pada salinitas berbeda (10 dan 20 ppt). Pengambilan rotifer dilakukan di suatu areal rencana reklamasi dan tempat pembuangan penelitian air limbah rumah tangga bertempat di pesisir Desa Tumpaan Satu Kabupaten Minahasa Selatan. Pada saat pengambilan hewan uji, parameter kualitas air di lokasi sampling juga diukur. Setelah diperbanyak dengan kultur klon pada salinitas 10 dan 20 ppt, rotifer kemudian diuji viabilitas dengan melakukan pengamatan setiap hari data jumlah rotifer yang hidup, jumlah telur yang dibawah dan jumlah anak yang dihasludgean. Data kemudian dihitung menggunakan metode life table.Hasil pengukuran kualitas air dari perairan tempat pengambilan rotifer termasuk layak untuk kehidupan rotifer. Rotifer yang diuji pada salinitas 10 ppt memiliki kemampuan hidup serta pertumbuhan populasi (nilai Ro dan laju fertilitas) lebih tinggi dibandingkan pada salinitas 20 ppt. Hal ini menunjukkan bahwa selain kualitas pakan, pertumbuhan rotifer juga dipengaruhi oleh salinitas.

scholarly journals Environmental assessment of luiz Rau Stream (Brazil) utilizing allium cepa test

2020 ◽  
Vol 42 ◽  
pp. e76 ◽  
Author(s):  
Gabriela Zimmermann Prado Rodrigues ◽  
Aline Belem Machado ◽  
Mariana Finkler ◽  
Daiane Bolzan Berleze ◽  
Günther Gehlen
Keyword(s):  
Allium Cepa ◽  
Water Samples ◽  
Physicochemical Parameters ◽  
Sampling Site ◽  
Control Group ◽  
Sample Collection ◽  
Environmental Characteristics ◽  
Assessment Protocol ◽  
Allium Cepa Test

The aim of this study was to monitor the water quality of Luiz Rau stream, through physicochemical parameters, environmental characteristics of the site, and genotoxicity test in Allium cepa. Four water samples from Luiz Rau stream were collected once a week for one month and some physicochemical parameters were verified. The environmental characteristics were performed by the Quick Assessment Protocol (QAP) and evaluated at the sampling site. For the genotoxicity assay, the Allium cepa test was utilized. In relation to the water physicochemical parameters, low levels of dissolved oxygen (DO) and high levels of ammonia, and phosphorus were obtained, which demonstrates the poor quality of the stream. The QAP results identified the stream as impacted. The mitotic index parameter was altered in the seed exposed to raw water samples in the third and fourth sample collection, demonstrating cell cycle reduction and proliferation respectively; witch can be associated with the presence of contaminated effluents in the water. In relation to the genotoxicity, the micronuclei were increased in seeds exposed to four raw samples in comparison to the control group. Therefore, the results obtained can characterize the Luiz Rau stream as impacted, mostly by anthropic actions, corroborating with other publications.

Multivariate micropollutants analysis in marine waters

1995 ◽  
Vol 32 (9-10) ◽  
pp. 341-348
Author(s):  
V. Librando ◽  
G. Magazzù ◽  
A. Puglisi
Keyword(s):  
Multivariate Data Analysis ◽  
Partial Least Squares Regression ◽  
Environmental Chemistry ◽  
Sampling Site ◽  
Principal Component ◽  
Least Squares Regression ◽  
Organic Micropollutants ◽  
Suspended Material ◽  
The Difference

The monitoring of water quality today provides a great quantity of data consisting of the values of the parameters measured as a function of time. In the marine environment, and especially in the suspended material, increasing importance is being given to the presence of organic micropollutants, particularly since some are known to be carcinogenic. As the number of measured parameters increases examining the data and their consequent interpretation becomes more difficult. To overcome such difficulties, numerous chemometric techniques have been introduced in environmental chemistry, such as Multivariate Data Analysis (MVDA), Principal Component Analysis (PCA) and Partial Least Squares Regression (PLSR). The use of the first technique in this work has been applied to the interpretation of the quality of Augusta bay, by measuring the concentration of numerous organic micropollutants, together with the classical water pollution parameters, in different sites and at different times. The MVDA has highlighted the difference between various sampling sites whose data were initially thought to be similar. Furthermore, it has allowed a choice of more significant parameters for future monitoring and more suitable sampling site locations.

scholarly journals Advances in Environmental Hydraulics

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1192
Author(s):  
Carlo Gualtieri ◽  
Dongdong Shao ◽  
Athanasios Angeloudis
Keyword(s):  
Environmental Quality ◽  
Natural Water ◽  
Environmental Water ◽  
Water Systems ◽  
Scientific Study ◽  
Environmental Hydraulics ◽  
Transport And Transformation ◽  
Water Flows ◽  
Transformation Processes

Environmental Hydraulics (EH) is the scientific study of environmental water flows and their related transport and transformation processes affecting the environmental quality of natural water systems, such as rivers, lakes, and aquifers, on our planet Earth [...]

scholarly journals Lichen functional traits and light influx in the analysis of environmental quality of subtropical riparian ecosystems

2021 ◽  
Vol 125 ◽  
pp. 107510
Author(s):  
Márcia Isabel Käffer ◽  
Renan Kauê Port ◽  
João B.G. Brito ◽  
Jairo Lizandro Schmitt
Keyword(s):  
Functional Traits ◽  
Environmental Quality ◽  
Riparian Ecosystems
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