Investigation of the influence of &lt;i&gt;Ceratophyllum demersum&lt;/i&gt; to refine diluted compost latex

M Foroughi

doi:10.4314/jasem.v15i2.68530

Abstract

Water pollution has always been a major problem in the environment. Polluted water is harming for human health and need to clean water from pollution factors. One of the economic and rapid methods forelements removal is displacement metals by biosorption. The purpose of this study was refining diluted compost latex by Ceratophyllum demersum that was diluted 200 times with distilled water. Diluted compost latex (DCL)accompany with aquatic plant Ceratophyllum demersum was located in bottles which were 6 liter in four replication. The experimental performed at the open air of Khorasgan (Isfahan, Iran) University area for 18 dayswithout aeration. Result of Chemical oxygen demand (COD) indicates that the COD was decreased from 728 mg/L to 189.5 mg/L. Also, this investigation was demonstrated that the amount of ammonium in diluted compost latex was decreased from 60 meq/L to 13.33 meq/L. The amount of nitrate in diluted compost latex has decreased from 90 meq/L to 26.66 meq/L, and the amount of Phosphorous was declined from 1.2 meq/L to 0.21 meq/L. EC of diluted compost latex was reduced from 1.02 ds/m to 0.74 ds/m. All of the consequences which were mentioned indicated that this aquatic plant (Ceratophyllum demersum) is one of the best natural ways to refine Polluted water.

Highlights

Pollution of the environment with toxic metals has been attracting considerable public attention over the past few decades (Li and Thornton, 2001)
Gaoa et al showed that submerged macrophytes could be used in reducing the P levels of nutrient enriched waters, and C. demersum had the best removal effect with the removal rates among other aquatic plants
From the work presented here, the aquatic submerged plant C. demersum can be an effective biosorbent for Phosphor, ammonium and nitrate

Summary

Introduction

Pollution of the environment with toxic metals has been attracting considerable public attention over the past few decades (Li and Thornton, 2001). Conventional methods for removing metals from aqueous solutions include chemical precipitation, chemical oxidation or reduction, ion exchange, filtration, electrochemical treatment, reverse osmosis, membrane technologies and evaporation recovery. These processes may be ineffective or extremely expensive especially when the metals in solution are in the range of 1–100 mg L-1 (Nourbakhsh et al, 1994). C. demersum (Coontail or hornwort) is a completely submersed plant and commonly seen in ponds, lakes, ditches, and quiet streams with moderate to high nutrient levels (Johnson et al, 1995) It does not produce roots, instead it absorbs all the nutrients it requires from the surrounding water. It can float free in the water column and sometimes forms dense mats just below the surface .(Keskinkan.et al, 2004)

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