Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental study to optimise the treatment efficacy of pharmaceutical
  effluents by combining electron beam irradiation with conventional techniques   Availability of potable water is now a global concern. The inability of
conventional methods to completely remove the contaminants from industrial
effluents such as pharmaceutical and dye industries, limits the fraction of
water which can be recycled. In this paper, we report our first step towards
tackling this issue at the roots by irradiating the pharmaceutical effluents
from three different stages of their existing treatment plant with an Electron
Beam (EB) with doses varying from 25 kGy to 800 kGy. Furthermore, we have
successfully demonstrated that electron beam irradiation along with the use of
conventional techniques like coagulation before or after the irradiation can
further increase the efficacy of the process with a final reduction in Chemical
Oxygen Demand (COD) to be as large as 65% in some of the cases.

34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
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The categories of this paper are: eess
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas