Using water hyacinth (Eichhornia crassipes) biomass and humic substances to produce urea-based multi-coated slow release fertilizer

AbstractUrea-based multi-coated slow release fertilizer was produced using water hyacinth, humic substances, and chitosan, with water rich in natural organic matter as a solvent. Elemental analysis showed that the nitrogen content of the fertilizer (FERT) was around 20%. Swelling tests demonstrated the effectiveness of the water hyacinth crosslinker, which reduced the water permeability of the material. Leaching tests showed that FERT released a very low concentration of ammonium (0.82 mg L−1), compared to the amount released from urea (43.1 mg L−1). No nitrate leaching was observed for FERT, while urea leached 13.1 mg L−1 of nitrate. In water and soil, FERT showed maximum releases after 30 and 40 days, respectively, while urea reached maxima in just 2 and 5 days, respectively. The results demonstrated the promising ability of FERT to reduce nitrogen losses, as well as to minimize environmental impacts in the soil–plant-atmosphere system and to improve the efficiency of nitrogen fertilization. Graphic abstract

Download Full-text

Direct and interacting toxicological effects on the waterflea (Daphnia magna) by natural organic matter, synthetic humic substances and cypermethrin

The Science of The Total Environment ◽

10.1016/s0048-9697(03)00445-5 ◽

2004 ◽

Vol 319 (1-3) ◽

pp. 123-136 ◽

Cited By ~ 61

Author(s):

N Meems ◽

C.E.W Steinberg ◽

C Wiegand

Keyword(s):

Organic Matter ◽

Humic Substances ◽

Daphnia Magna ◽

Natural Organic Matter ◽

Toxicological Effects

Download Full-text

Fouling analysis of polysulfone ultrafiltration membranes used for drinking water treatment

Water Science & Technology Water Supply ◽

10.2166/ws.2011.094 ◽

2011 ◽

Vol 11 (6) ◽

pp. 668-674 ◽

Cited By ~ 1

Author(s):

B. Q. Zhao ◽

C. P. Huang ◽

S. Y. Chen ◽

D. S. Wang ◽

T. Li ◽

...

Keyword(s):

Drinking Water ◽

Organic Matter ◽

Water Treatment ◽

Fulvic Acid ◽

Humic Substances ◽

Natural Organic Matter ◽

Drinking Water Treatment ◽

Ultrafiltration Membranes ◽

Fluorescence Excitation ◽

Hydrophobic Fraction

Natural organic matter (NOM) plays a significant role in the fouling of ultrafiltration membranes in drinking water treatment processes. For a better understanding of the interaction between fractional components of NOM and polysulfone (PS) ultrafiltration membranes used for drinking water treatment, fouling and especially the physically irreversible fouling of natural organic matter were investigated. Resin fractionation, fluorescence excitation–emission matrix (EEM) spectroscopy, fourier transform infrared spectroscopy (FTIR), contact angle and a scanning electron microscope (SEM) were employed to identify the potential foulants. The results showed that humic acid and fulvic acid of small size were likely to permeate the membrane, while the hydrophobic fraction of humic and fulvic acid and aromatic proteins tended to be rejected and retained. Organic compounds such as proteins, humic substances, and polysaccharide-like materials, were all detected in the fouling layer. The physically irreversible fouling of the PS membrane seemed to be mainly attributed to the hydrophobic fraction of humic substances.

Download Full-text

The role of humic substances in chromium sorption onto natural organic matter (peat)

Chemosphere ◽

10.1016/j.chemosphere.2005.09.042 ◽

2006 ◽

Vol 63 (11) ◽

pp. 1974-1982 ◽

Cited By ~ 36

Author(s):

J. Kyziol ◽

I. Twardowska ◽

Ph. Schmitt-Kopplin

Keyword(s):

Organic Matter ◽

Humic Substances ◽

Natural Organic Matter

Download Full-text

PENGGUNAAN ECENG GONDOK (Eichhornia crassipes)TERFERMENTASI DALAM RANSUM ITIK TERHADAP KECERNAAN BAHAN KERING DAN BAHAN ORGANIK

ZOOTEC ◽

10.35792/zot.36.2.2016.12539 ◽

2016 ◽

Vol 36 (2) ◽

pp. 372

Author(s):

Ronald Rompas ◽

B Tulung ◽

J S Mandey ◽

M Regar

Keyword(s):

Organic Matter ◽

Water Hyacinth ◽

Dry Matter ◽

Eichhornia Crassipes ◽

Dry Matter Digestibility ◽

Randomized Design ◽

Honestly Significant Difference ◽

Significant Difference ◽

Organic Matter Digestibility ◽

Difference Test

ABSTRACT UTILIZATION OF FERMENTED WATER HYACINTH (Eichhornia crassipes) IN DUCK DIETS ON DRY MATTER AND ORGANIC MATTER DIGESTIBILITY.The study aimed to determine the use of fermented water hyacinth (Eichhornia crassipes) (FWH) in duck dietson dry matter and organic matter digestibility. This study was carried out for three weeks using 20 crossbred ducks of Mojosari and Alabio (MA), 8 weeks of age. This study was conducted using a completely randomized design with 5 treatments and 4 replications. The treatments were R0 (0% FWH), R1 (10% FWH), R2 (20% FWH), R3 (30% FWH), R4 (40% FWH). Results showed that treatments was highly significant (P<0.01) affectedto dry matter and organic matter digestibility. Honestly significant difference test (HSD) on dry matter digestibility showed that there were no significant between treatment R0 (70.85%), R1 (71.08%), R2 (70,47%) and R4 (69.47%). The R3 diet was significantly higher than R4, but was not significantlydifferentbetween R0 and R1. The HSDtest on organic matter digestibility showed that there was no significant difference between R3 (76 27) and R0 (75.30%), R1 (75.43%) and R2 (775,17%), but R3 was significantly higher than R4 (74.13%). There were no significant differencebetween R0, R1, R2, and R4 diets. It can be concluded that fermented water hyacinth reach can be used till 30% in duck diet substituted to rice bran. Keywords:Fermented water hyacinth, Digestibility,Dry matter, Organic matter

Download Full-text

NOM removal technologies – Norwegian experiences

Drinking Water Engineering and Science ◽

10.5194/dwes-3-1-2010 ◽

2010 ◽

Vol 3 (1) ◽

pp. 1-9 ◽

Cited By ~ 51

Author(s):

H. Ødegaard ◽

S. Østerhus ◽

E. Melin ◽

B. Eikebrokk

Keyword(s):

Organic Matter ◽

Activated Carbon ◽

Humic Substances ◽

Natural Organic Matter ◽

Membrane Filtration ◽

Granular Media ◽

Physical Adsorption ◽

Nanofiltration Membranes ◽

Removal Technologies ◽

Molecular Sieving

Abstract. The paper gives an overview of the methods for removal of natural organic matter (NOM) in water, particularly humic substances (HS), with focus on the Norwegian experiences. It is demonstrated that humic substances may be removed by a variety of methods, such as; molecular sieving through nanofiltration membranes, coagulation with subsequent floc separation (including granular media or membrane filtration), oxidation followed by biofiltration and sorption processes including chemisorption (ion exchange) and physical adsorption (activated carbon). All these processes are in use in Norway and the paper gives an overview of the operational experiences.

Download Full-text