Adsorption of textile wastewater containing triple dye on the garden soil: optimisation and modelling by Taguchi method

ABSTRACT

The textile industry is a sector that should be taken into account in terms of environmental pollution. There is excessive water consumption and there are different pollutants in the wastewater besides dyes. The adsorption to the garden soil of textile wastewater containing three different Astrazon dyes was investigated in terms of the following parameters; dye concentration, different dye content, salt concentration, temperature, pH, contact time, adsorbent dosage.

It was observed that the parameters had different effects on organic matter and colour removal. Under optimum conditions, an organic matter removal of over 86% and colour removal of 100% were achieved. Moreover, the operating parameters’ relationship with ORP was evaluated and from the results of FTIR analysis, it was concluded that Astrazon dyes were very stable. The fact that organic matter removal was lower than colour removal shows that mineralisation is difficult. Textile dyes can be successfully removed by adsorption using the soil, which does not require chemical use except pH adjustment, which is a simple system and easy to operate.

This study also shows that if textile wastewater is to be consciously or unconsciously discharged to the soil without treatment, a large percentage of the dyes in textile wastewater will be adsorbed by the soil and cause soil pollution. Since the environmental system is in a cycle, soil pollution means surface/groundwater pollution and hindrance for plant growth. For this reason, textile wastewater that contains toxic and stable pollutants should not be discharged without treatment.

KEYWORDS:

• Astrazon dyes
• triple dye mixture
• garden soil
• adsorption
• ORP
• ftir

Credit authorship contribution statement

Elanur Adar: Conceptualization, Conducting experiments, Writing-review&editing; Filiz Nuran Acar: Review&editing, Supervised.

Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. No funds were used in this study

Disclosure statement

No potential conflict of interest was reported by the author(s).