Humic Substances in Ground Waters

1985 ◽  
Vol 50 ◽  
Author(s):  
N. Paxéus ◽  
B. Allard ◽  
U. Olofsson ◽  
M. Bengtsson
Keyword(s):  
Ground Water ◽  
Humic Substances ◽  
Chemical Properties ◽  
Spectroscopic Properties ◽  
Ground Waters ◽  
Molecular Weight Distributions ◽  
Physico Chemical ◽  
Weight Distributions ◽  
Humic Materials ◽  
Humic Fractions

AbstractThe humic materials isolated from ground waters of a borehole in Fjällveden (Sweden) were characterized by elemental and functional group analyses. Spectroscopic properties, molecular weight distributions as well as acid-base properties of the fulvic and humic fractions were also studied. The ground water humic substances were found to be quite similar in many respects (but not identical) to the Swedish surface water humics concentrated from the Gτ(b, A)öta River but appeared to be quite different from the American ground water humics from Biscayne Florida Aquifer or Laramie Fox-Hills in Colorado. The physico-chemical properties of the isolated humic materials are discussed.

scholarly journals Effect of Mineral and Humic Substances on Tailing Soil Properties and Nutrient Uptake by Pennisetum purpureum Schumach

2016 ◽  
Vol 20 (2) ◽  
pp. 101
Author(s):  
Adhe Phoppy Wira Etika ◽  
Rahmat Hasan
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Content ◽  
Humic Substances ◽  
Chemical Properties ◽  
Pennisetum Purpureum ◽  
Mineral Matter ◽  
Organic Carbon Content ◽  
Humic Material ◽  
Humic Materials

Tin mining produces a by-product sand tailing from soil leaching with characteristic low pH and total organic carbon, and can be reclaimed by providing a suitable ameliorant.  When available in situ, ameliorant materials can be economically used as they are required in large amounts. Fortunately, Bangka Belitung has sample stock of such kaolinite-rich minerals that can be utilized for improving soil chemical properties. Extracted organic materials, such as humic substances, can also be utilized as they influence the complex soil reactions, and promote plant growth. Thus, this study aimed to assess the effects of mineral, humic materials and interaction of both material on soil chemical properties and nutrient uptake of Pennisetum purpureum Schumach. A completely randomized design with 2 factors and 3 replications each was employed. Factor 1 was mineral matter is 0; 420; 840; 1.260 Mg ha-1 while Factor 2 was humic material is 0; 0.46; 0.92; 1.38 kg C ha-1. Air-dried samples of tailing were applied with oil palm compost then mixed evenly with mineral and humic materials.  Penissetum purpureum Schumach was planted after 4 weeks incubation, and maintained for another 4 weeks. The results demonstrated that the addition of mineral matter significantly increased soil organic carbon content, total N, exchangeable K, Fe, Mn and boosted nutrient - total Ca, Mg and Mn – uptake of the plant. But the application of humic material increased only soil organic carbon content. The interaction of both materials only lowered soil pH.

scholarly journals Positional Effect of π-extension in Triple Helicenes

2021 ◽  
Author(s):  
Alex van der Ham ◽  
Thomas Hansen ◽  
Hermen S. Overkleeft ◽  
Trevor A. Hamlin ◽  
Dmitri V. Filippov ◽  
...  
Keyword(s):  
Optical Properties ◽  
Rational Design ◽  
Marked Effect ◽  
Chemical Properties ◽  
Spectroscopic Properties ◽  
Positional Effect ◽  
Physico Chemical ◽  
Optical Applications ◽  
High Level ◽  
Vt Nmr

The targeted application of multiple helicenes in photo-optical applications requires their rational design. Toward this goal, we report on the synthesis of pyrene-based triple helicene 1 and investigate the positional effect of extension of the π-conjugated system on the photo-chemical and chiro-optical properties of triple helicenes. The conformational and aggregatory behavior of 1 were studied both experimentally using VT NMR spectroscopy and computationally using high-level DFT computations. Although π-extension was observed to have a marked effect on the spectroscopic properties of triple helicenes, comparison with other known π-extended helicenes reveals that the position at which π-extension is introduced is only of nominal importance. Our results thus suggest that the presence of a particular helicene motif is dominant in dictating the physico-chemical properties of triple helicenes.

Role of Organic Soil Amendments in Controlling Ground Water Pollution Due to Pesticides

2018 ◽  
pp. 61-68
Author(s):  
Anjana Srivastava ◽  
P. C. Srivastava
Keyword(s):  
Ground Water ◽  
Low Cost ◽  
Organic Amendments ◽  
Chemical Properties ◽  
Organic Soil ◽  
Ground Water Pollution ◽  
Physico Chemical ◽  
In Situ Decomposition

In soil, pesticide residues are subjected to various transformations and transportation processes. Leaching is one of the major transportation processes responsible for ground water contamination. Organic amendments used in agriculture are known to improve the physico-chemical properties of soil at low cost and are regarded as one of the most suitable technologies for sustainable agriculture. These amendments play an important role in the retention of pesticides because of increased adsorption of these chemicals on soil. Sorption of pesticides which are weak acids or bases, is influenced by soil pH because they assume a positive or negative charge, or no charge depending on the pH. Leaching of such pesticides to ground water can be prevented to a great extent by mixing of organic amendments to soil because they enhance the ability of pesticide retention on soil and or promote their microbial degradation as well during in situ decomposition of organic amendments in soil.

Synthesis and physico-chemical properties of peptides in soil humic substances

2004 ◽  
Vol 63 (3) ◽  
pp. 253-264 ◽  
Author(s):  
T.W.-M. Fan ◽  
A.N. Lane ◽  
E. Chekmenev ◽  
R.J. Wittebort ◽  
R.M. Higashi
Keyword(s):  
Humic Substances ◽  
Chemical Properties ◽  
Physico Chemical

scholarly journals Effect of Refuse Dump on Ground Water Quality at Farin-Gida Area of Mando, Kaduna State

2021 ◽  
pp. 41-50
Author(s):  
S. M. Adamu ◽  
A. A. Ijah ◽  
H. C. Ozoani ◽  
F. M. Rasheed ◽  
J. O. Emmanuel ◽  
...  
Keyword(s):  
Water Quality ◽  
Ground Water ◽  
Chemical Properties ◽  
Total Dissolve Solid ◽  
Total Alkalinity ◽  
World Health ◽  
Ground Water Quality ◽  
Physico Chemical ◽  
Dug Wells ◽  
Health Organization

This study shows the effect s of solid waste dumpsite on ground water quality in Farin-gida, Kaduna State Nigeria. Water samples were collected from six (6) different wells in three(3) strategic areas that have major dumpsites in Farin-gida. These samples were collected in November from both bore holes and hand dug wells within (0-50 meters) to the dumpsite. The following physico-chemical properties of well water was tested for, in the laboratory thus; Total Dissolve Solid, Total Alkalinity, Fluoride, PH, Turbidity and Electrical Conductivity. The results obtained as shown in table 1,2 and 3 respectively indicate that all the wells have varying levels of physico-chemical concentration that is different from the standard as recommended by World Health Organization (WHO) and Nigeria Standard for Drinking Water Quality (NSDWQ), which implies that the water from the study areas are not safe for drinking. Hence, should be treated.

Sign in / Sign up

Export Citation Format

Share Document