scholarly journals Study of Physicochemical of Rivers in DKI Jakarta Province

2021 ◽  
Vol 934 (1) ◽  
pp. 012058
Author(s):  
E Prihatinningtyas ◽  
T Jasalesmana ◽  
R Novianti ◽  
E Nafisyah
Keyword(s):  
Water Quality ◽  
Pollution Level ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Sampling Locations ◽  
Physicochemical Measurement ◽  
Total Dissolved Solid ◽  
Very High ◽  
Made In

Abstract Most of inland water in DKI Jakarta Province are highly polluted caused by the increase in urbanization, industrialization development and reclamation process. This research intend to conduct an initial characterization of the water quality in Jakarta. The survey was conducted in 9 location namely Kali Sunter 1, Kali Sunter 2, Cakung Drain, POM Vyle Pluit, Waduk Pluit, Museum Bahari, WTC Mangga Dua, Mookenvart and Pesanggrahan. Based on the level of salinity, the rivers are categorized into fresh water (Cakung Drain, WTC Mangga Dua, Mookenvart and Pesanggrahan) and brackish water (Kali Sunter 1, Kali Sunter 2, Pluit Village, Waduk Pluit, and Museum Bahari). The physicochemical measurement using Water Quality Checker reported turbidity and Total Dissolved Solid (TDS) concentration were very high at all sampling locations. The Oxidation Reduction Potential (ORP) value can be used to determine the pollution status. Pesanggrahan is the only river with a positive ORP value of 22 mV. It can be said that the pollution level of the Pesanggrahan is very low. The other rivers have a negative ORP value and the largest is in Kali Sunter 2. Serious efforts need to be made in dealing with inland waters pollution located in Jakarta.

scholarly journals Sarıkum Gölü’nde (Sinop) Anyonik Deterjan Kirliliğinin Belirlenmesi

2019 ◽  
Vol 7 (11) ◽  
pp. 1825
Author(s):  
Zeynep Hasançavuşoğlu ◽  
Ayşe Gündoğdu
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Measurement Data ◽  
Surface Water Quality ◽  
Pollution Level ◽  
Detergent Concentration ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Dissolved Matter ◽  
One Year

The study was aimed to determine the anionic detergent pollution level and some physico-chemical parameters (pH, salinity, dissolved oxygen, total dissolved substance, conductivity, temperature, phosphate, oxidation reduction potential) seasonally in Sarıkum Lake, which is located in Sinop province between November 2016 and July 2017. According to one-year measurement data, the highest of anionic detergent concentration was 0.056 mg / L and the lowest value was 0.021 mg / L. The classification of the results was made in accordance with the Water Pollution Control Regulation (2008) and Surface Water Quality Regulation (2016). In the study, Water quality is equivalent to Class I (high quality) in terms of anionic detergent, pH and temperature values but are equivalent to Class II (a bit dirty) and III (dirty) in point of dissolved oxygen, total dissolved matter and phosphate phosphorus values. In addition, it is equivalent to Class IV (very dirty) with regard to conductivity value. Detergent pollution coming from the settlements of Sarıkum Lake is observed to be low in contrast to expectations, while the high phosphorus value shows that the ecosystem living in the lake is exposed to agricultural pollution especially in terms of environmental resources.

Purification and Characterization of Cytochrome 553 from the Chrysophycean Alga Monochrysis lutheri

1971 ◽  
Vol 49 (6) ◽  
pp. 641-646 ◽  
Author(s):  
M. V. Laycock ◽  
J. S. Craigie
Keyword(s):  
Amino Acid ◽  
Higher Plants ◽  
Sedimentation Coefficient ◽  
Cytochrome F ◽  
Reduced Form ◽  
Amino Acid Residues ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Equilibrium Centrifugation

Cytochrome 553, an electron carrier in photosynthesis and a functional analogue of cytochrome f of higher plants, was isolated from Monochrysis lutheri and purified by salt fractionation, chromatography, and isoelectric focussing. Absorption maxima occurred at 275, 320, 416, 523, and 553 nm in the reduced form. The α-absorption peak was symmetrical and had an extinction coefficient of 25.9 mM−1 cm−1. The molecular weight was 11 100 by equilibrium centrifugation, 12 400 from iron determinations, and 10 300 from the amino acid composition. The molecule consisted of one heme group and 91 amino acid residues including two cysteine residues and one each of histidine, arginine, tryptophan, methionine, and proline. Other physical properties measured were: the sedimentation coefficient, 1.3 S; the normal oxidation reduction potential, + 0.388 V; and the isoelectric point, pH 3.75.

scholarly journals Study of geothermometers and chemical composition of hot springs in Zavkhan province

2019 ◽  
pp. 61-67
Author(s):  
Bolormaa Ch ◽  
Oyuntsetseg D ◽  
Bolormaa O
Keyword(s):  
Hot Springs ◽  
Hot Spring ◽  
Geothermal Gradient ◽  
Spring Water ◽  
Geothermal Water ◽  
Reservoir Temperature ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Temperature Ranges ◽  
Total Dissolved Solid

In this study, we collected hot spring water sample from Otgontenger, Tsetsuukh, Zart, Ulaan Khaalga and Khojuul in Zavkhan province. The purpose of this study is to determine the temperature of geothermal water and its depth which based on the hydrochemical component. Hot spring water analyses showed that temperature ranges between 33.4 to 45.5°C, pH ranges 8.40 to 9.56, and the total dissolved solid amount was 170 to 473 mg/L. From the result of hydrochemical analyses, hot spring samples were included in SO4-Na and HCO3-Na type. In comparison to other hot spring samples, Tsetsuukh hot spring has shown negative oxidation reduction potential, -0.8 mV and dissolved hydrogen, 0.22 mg/L. Therefore, it has a higher ability for medical treatment than other hot spring water due to its reduction state. The reservoir temperature of these hot springs is calculated by several geothermometer methods, and temperatures ranged between 102оC to 149оC. According to this result, it assumed that geothermal water with low temperature which has the ability to use for room heating and producing energy by the binary system. Thus, we determined that reservoir depth is 1.3 to 3.7 km using annual average surface and reservoir temperature, and regional geothermal gradient. Завхан аймгийн халуун рашаануудын химийн найрлага, геотермометрийн судалгаа Хураангуй: Бид энэхүү судалгааны ажлаар Завхан аймгийн нутагт орших Отгонтэнгэр, Зарт, Цэцүүх, Улаан хаалга, Хожуулын халуун рашаануудын гидрохимийн найрлагыг нарийвчлан тогтоосоны үндсэн дээр тухайн рашаануудын газрын гүний халуун усны температур болон гүнийг тогтоох зорилго тавин ажиллаа. Завхан аймгийн рашаанууд нь халуун 33.4-45.5°C температуртай, шүлтлэг орчинтой (pH 8.4-9.56), 170-473 мг/л хүртэл эрдэсжилттэй, HCO3-Na болон SO4-Na-ийн төрлийн халуун рашааны ангилалд хамаарагдаж байна. Эдгээр рашаануудаас Цэцүүхийн халуун рашааны исэлдэн ангижрах потенциал нь -0.8 мВ, ууссан устөрөгчийн агуулга 0.22 мг/л илэрсэн нь судалгаанд хамрагдсан бусад рашаануудтай харьцуулахад ангижрах төлөвт оршиж байгаа бөгөөд илүү эмчилгээний идэвхтэй болохыг харуулж байна. Судалгаанд хамрагдсан халуун рашаануудын гүний температурыг химийн найрлагаас нь хамааруулан хэд хэдэн геотермометрийг ашиглан тооцоход дунджаар 102-149oС байсан ба энэ нь бага температуртай усны ангилалд хамаарагдаж байгаа учир тухайн халуун усны нөөцийг өрөө тасалгаа халаах болон бинари системийг ашиглан цахилгаан гаргаж авах боломжтой байна. Мөн Завхан аймгийн халуун рашаануудын газрын гүний халуун усны нөөц нь газрын гадаргаас доош 1.3-3.7 км-ийн гүнд байрладаг болохыг орд дээрх температур, газрын гүний халуун усны температур болон бүс нутгийн геотермал градиентад үндэслэн тооцоолон тодорхойллоо. Түлхүүр үг: Гидрохими, халуун рашаан, геотермометр, гүний температур.

scholarly journals Chemometric characterization of textile waste waters from different processes

2021 ◽  
Vol 9 (2) ◽  
Author(s):  
Tina Jerič ◽  
Darinka Brodnjak Vončina ◽  
Alenka Majcen Le Marechal ◽  
Darja Kavšek
Keyword(s):  
Waste Water ◽  
Water Quality ◽  
Suspended Solids ◽  
Pollution Level ◽  
Waste Waters ◽  
Mutual Correlation ◽  
Linear Discriminant ◽  
Textile Waste ◽  
Textile Waste Water

The aim of this work is focused on water quality classification of the textile waste water streams and evaluation of pollution. Data from the chemical characterization of the effluents were elaborated to identify a useful separation in potentially treatment for reuse. This was done with the aim of realizing a full scale characterization of effluents. In the two textile companies analyzed, machineries are used to carry out different production processes such as sizing and desizing, weaving, scouring, bleaching, mercerizing, carbonizing, fulling, dying and finishing. Different process effluents from the same machinery were found to be very diverse in pollution level. 25 and 49 samples of textile waste waters from two different textile companies were analysed and physical chemical measurements were performed. The following physicochemical and chemical water quality parameters were controlled: absorbance measured at three different wavelengths, pH, conductivity, turbidity, total suspended solids, volatile suspended solids, chemical oxygen demand, metals content (Ba, Ca, Cu, Mn, K, Sr, Fe, Al, Na) and total nitrogen content. For handling the results, basic statistical methods for the determination of mean and median values, standard deviations, minimal and maximal values of measured parameters and their mutual correlation coefficients, were performed. Different chemometric methods, namely, principal component analysis (PCA), cluster analysis (CA), and linear discriminant analysis (LDA) were used to find hidden information about textile waste water quality.

scholarly journals SOFTWARE FOR CALCULATING A WATER QUALITY INDICATOR SPECIFIC TO THE AMAZON REGION

2021 ◽  
Vol 9 (3) ◽  
pp. 248-261
Author(s):  
A. M. F. de Souza ◽  
S. F. P. Pereira ◽  
L. P. Santos ◽  
C. S. e Silva ◽  
R. M. Rocha ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Indicator ◽  
Quality Parameters ◽  
Web Interface ◽  
Natural Ecosystems ◽  
Water Quality Indicator ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential

The quality of the water in the Amazon's reservoirs is of fundamental importance for natural ecosystems, biota, and for the region's population. Maintaining the water quality involves long-term monitoring programs established by the requirements of Brazilian legislation. A web interface may facilitate the use of monitoring results routinely, which allows periodic insertion of previously selected water quality parameters results, to finally provide a simple and direct way to evaluate the water quality. The general objective of this study was to develop a software based on a water quality indicator (WQI) system considering chemical, physical-chemical, and biological parameters evaluated in four seasonal periods in Samuel dam. Multivariate analysis was used to select 10 significant variables (oxidation-reduction potential, dissolved oxygen, total dissolved solids, chlorophyll a, phosphate, Ba, Ca, Fe, Na, and Sn). The web software added innovation to the project, enabling to storage of data from analysis of field-collected samples in an organized and safe way in a database, in addition to speeding up the calculation of the WQI, making it possible to classify the water quality more quickly and accurately.

scholarly journals Water Quality and Microbial Community Changes in an Urban River after Micro-Nano Bubble Technology in Situ Treatment

Water ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 66 ◽  
Author(s):  
Yifei Wu ◽  
Hui Lin ◽  
Weizhao Yin ◽  
Sicheng Shao ◽  
Sihao Lv ◽  
...  
Keyword(s):  
Water Quality ◽  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Dominant Bacteria

Currently, black-odor river has received great attention in China. In this study, the micro-nano bubble technology (MBT) was used to mitigate the water pollution rapidly and continuously by increasing the concentration of dissolved oxygen (DO) in water. During treatment, the concentration of DO increased from 0.60 mg/L to over 5.00 mg/L, and the oxidation reduction potential (ORP) also changed from a negative value to over 100.00 mV after only five days aeration. High throughput pyrosequencing technology was employed to identify the microbial community structure. At genus level, the dominant bacteria were anaerobic and nutrient-loving microbes (e.g., Arcobacter sp., Azonexus sp., and Citrobacter sp.) before, and the relative abundances of aerobic and functional microbes (e.g., Perlucidibaca sp., Pseudarcicella sp., Rhodoluna sp., and Sediminibacterium sp.) were increased after treatment. Meanwhile, the water quality was significantly improved with about 50% removal ratios of chemical oxygen demand (CODCr) and ammonia nitrogen (NH4+-N). Canonical correspondence analysis (CCA) results showed that microbial community structure shaped by COD, DO, NH4+-N, and TP, CCA1 and CCA2 explained 41.94% and 24.56% of total variances, respectively. Overall, the MBT could improve the water quality of urban black-odor river by raising the DO and activate the aerobic microbes.

scholarly journals On the role of operational dynamics in biogeochemical efficiency of a soil aquifer treatment system

2020 ◽  
Vol 24 (1) ◽  
pp. 417-426 ◽  
Author(s):  
Shany Ben Moshe ◽  
Noam Weisbrod ◽  
Felix Barquero ◽  
Jana Sallwey ◽  
Ofri Orgad ◽  
...  
Keyword(s):  
Water Quality ◽  
Large Scale ◽  
Field Measurements ◽  
Treated Wastewater ◽  
Soil Aquifer Treatment ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Flooding And Drying ◽  
Promising Solution ◽  
Sustainable Irrigation

Abstract. Sustainable irrigation with treated wastewater (TWW) is a promising solution for water scarcity in arid and semi-arid regions. Soil aquifer treatment (SAT) provides a solution for both the need for tertiary treatment and seasonal storage of wastewater. Stresses over land use and the need to control the obtained water quality makes the optimization of SAT of great importance. This study looks into the influence of SAT systems' operational dynamics (i.e., flooding and drying periods) as well as some aspects of the inflow biochemical composition on their biogeochemical state and the ultimate outflow quality. A series of four long-column experiments was conducted, aiming to examine the effect of different flooding/drying period ratios on dissolved oxygen (DO) concentrations, oxidation–reduction potential (ORP) and outflow composition. Flooding periods were kept constant at 60 min for all experiments while drying periods (DPs) were 2.5 and 4 times the duration of the flooding periods. Our results show that the longer DPs had a significant advantage over the shorter periods in terms of DO concentrations and ORP in the upper parts of the column as well as in the deeper parts, which indicates that larger volumes of the profile were able to maintain aerobic conditions. DO concentrations in the deeper parts of the column stabilized at ∼3–4 mg L−1 for the longer DPs compared to ∼1–2 mg L−1 for the shorter DPs. This advantage was also evident in outflow composition that showed significantly lower concentrations of NH4+-N, dissolved organic carbon (DOC) and total Kjeldahl nitrogen (TKN) for the longer DPs (∼0.03, ∼1.65 and ∼0.62 mg L−1 respectively) compared to the shorter DPs (∼0.5, ∼4.4 and ∼3.8 mg L−1, respectively). Comparing experimental ORP values in response to different DPs to field measurements obtained in one of the SAT ponds of the SHAFDAN, Israel, we found that despite the large-scale differences between the experimental 1-D system and the field 3-D conditions, ORP trends in response to changes in DP, qualitatively match. We conclude that longer DP not only ensure oxidizing conditions close to the surface, but also enlarge the active (oxidizing) region of the SAT. While those results still need to be verified at full scale, they suggest that SAT can be treated as a pseudo-reactor that to a great extent could be manipulated hydraulically to achieve the desired water quality while increasing the recharge volumes.

scholarly journals Physico-chemical characterisation of sea buckthorn extracts for cosmetic use

2014 ◽  
Vol 25 (2) ◽  
pp. 75-80 ◽  
Author(s):  
Elisabeta Chirila ◽  
Elena Oancea ◽  
Ioana Adina Oancea
Keyword(s):  
Reduction Potential ◽  
Fruit Juice ◽  
Skin Diseases ◽  
Sea Buckthorn ◽  
Cosmetic Products ◽  
Complex Samples ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Physico Chemical

Abstract The purpose of the paper is to present original results concerning characterization of different sea buckthorn (Hippophae rhamnoides L.) extracts and some original dermato-cosmetic products containing these extracts. Aqueous distillate from fruits and leafy branches, aqueous extract from seeds, fresh fruit juice and frozen fruit juice after 2 years of storage, ethanolic extracts of buds have been analyzed for the following parameters: total and organic acidity, oxidability, calcium and magnezium, pH, conductivity, oxidation-reduction potential (ORP). The investigated sea buckthorn extracts have important contribution in care and treatment of skin diseases; during many years of experience in this field great benefits have been observed. Taking into account also the results of previous studies of other researchers we consider that the ORP measurement of cosmetic mixtures could provide objective, cheap and reliable information about antioxidant activity of complex samples.

scholarly journals On the role of operational dynamics in biogeochemical efficiency of a soil aquifer treatment system

2019 ◽  
Author(s):  
Shany Ben Moshe ◽  
Noam Weisbrod ◽  
Felix Barquero ◽  
Jana Sallwey ◽  
Ofri Orgad ◽  
...  
Keyword(s):  
Water Quality ◽  
Field Measurements ◽  
Treated Wastewater ◽  
Soil Aquifer Treatment ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Flooding And Drying ◽  
Promising Solution ◽  
Sustainable Irrigation

Abstract. Sustainable irrigation with treated wastewater (TWW) is a promising solution for water scarcity in arid and semi-arid regions. Soil aquifer treatment (SAT) provides a solution for both the need for tertiary treatment and seasonal storage of wastewater. Stresses over land use and the need to control the obtained water quality makes the optimization of SAT of great importance. This study looks into the influence of SAT systems' operational dynamics (i.e. flooding and drying periods) as well as some aspects of the inflow biochemical composition on their bio-geo-chemical state and the ultimate outflow quality. A series of four long-column experiments was conducted, aiming to examine the effect of different flooding/drying period ratios on dissolved oxygen (DO) concentrations, oxidation-reduction potential (ORP) and outflow composition. Flooding periods were kept constant at 60 minutes for all experiments while drying periods (DP) were 2.5 and 4 times the duration of the flooding periods. Our results show that the longer DP had a significant advantage over the shorter periods in terms of DO concentrations and ORP in the upper parts of the column as well as in the deeper parts, which indicates that larger volumes of the profile were able to maintain aerobic conditions. This advantage was evident also in outflow composition analyses that showed significantly lower concentrations of DOC, TKN and ammonium in the outflow for the longer DP. Comparing experimental ORP values in response to different DP to field measurements obtained in one of the SAT ponds of the SHAFDAN, Israel, we found that despite the major scale differences between the experimental 1D system and the field 3D conditions, ORP trends in response to changes in DP, qualitatively match. We conclude that longer DP not only ensure oxidizing conditions close to the surface, but also enlarge the active (oxidizing) region of the SAT. While those results still need to be verified in full scale, they suggest that SAT can be treated as a pseudo-reactor that to a great extent could be manipulated hydraulically to achieve the desired water quality while increasing the recharge volumes.

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