Comparative analysis of residual organic pollutants from bleached and unbleached paper mill wastewater and their toxicity on Phaseolus aureus and Tubifex tubifex

2020 ◽  
Vol 17 (10) ◽  
pp. 860-870
Author(s):  
Adarsh Kumar ◽  
Ajay Kumar Singh ◽  
Ram Chandra
2020 ◽  
Vol 8 (5) ◽  
pp. 663-675
Author(s):  
Ajay Kumar Singh ◽  
◽  
Adarsh Kumar ◽  
Ram Chandra ◽  
◽  
...  

The pulp and paper industry released different chemical pollutants that are directly discharged into the environment without proper treatment. This experiment was carried out to study the effect of pulp paper mill sludge amendments with garden soil (25%, 50%, 75%, and 100%), and garden soil was utilized as a control in a pot experiment. This study revealed the growth parameters of Triticum aestivum and Brassica campestris in germination percentage and germination index values decreased with rising in sludge concentration. Further, Soil amended with 25% paper mill sludge slightly reduced the growth in root length, shoot length, biomass, photosynthetic, and 50% sludge amended soil had variable effects on the root, shoot, and photosynthetic pigment of T. aestivumand B. campestris. However, the toxicity of effluent on tubifex-tubifex worms was also carried out at selected concentrations (25%, 50%, 75%, and 100%). Results of the study suggested that after 24 hours of exposure (>25% concentration), tubifex worms showed various changes such as morphological changes; hemoglobin content disappeared at the lethal concentrations of pulp paper mill effluent; cell bursting, and the back of the body became white with body disintegration at the lethal concentrations of pulp paper mill effluent. This article mainly focuses on the toxicity of the organic pollutants in terrestrial and aquatic life due to pulp paper mill effluent.


2004 ◽  
Vol 49 (1) ◽  
pp. 9-14 ◽  
Author(s):  
G. Langergraber ◽  
N. Fleischmann ◽  
F. Hofstaedter ◽  
A. Weingartner

A submersible UV/VIS spectrometer was used to monitor a paper mill wastewater treatment plant. It utilises the UV/VIS range (200-750 nm) for simultaneous measurement of COD, filtered COD, TSS and nitrate with just a single instrument. The instrument measures in-situ, directly in the process. Paper mill wastewater shows typical and reproducible spectra at various process measuring points. There is a relative maximum at 280 mm due to the absorbance by dissolved organic substances, mainly ligninic acids. Comparison of absorbance spectra distinctly shows the decrease of this peak, indicating biological degradation throughout the treatment process. Summarising, one can say that paper mill wastewater cannot be monitored by a simple UV probe measuring only the absorbance at a single wavelength. The required information can only be gained from the whole spectra. Regarding plant control it is suggested that only the overall spectral information is used. Calibrations to conventional parameters are now merely carried out for purposes of reference-checking.


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