Open AccessCHARACTERISATION AND ADSORPTION OF HEAVY METALS IN INDUSTRIAL EFFLUENT FROM PAINT AND COATING INDUSTRIES IN NAIROBI, KENYA
Author(s) -
Stephen O. Ahenda,
Kithure G.N.Joyce,
Njenga Hellen,
Wangeci N Alex,
Nyangau O.Jared
Publication year - 2019
Publication title -
international journal of engineering applied science and technology
Language(s) - English
Resource type - Journals
ISSN - 2455-2143
DOI - 10.33564/ijeast.2019.v04i05.007
Subject(s) - effluent , adsorption , heavy metals , coating , industrial effluent , metallurgy , materials science , environmental science , pulp and paper industry , waste management , environmental health , environmental chemistry , environmental engineering , engineering , chemistry , medicine , composite material , organic chemistry
A study was conducted to estimate current status of physico-chemical characteristics of effluents emanating from three paint factories within the main industrial area of Nairobi County. The effluents were analysed for temperature, pH, oil and grease, total suspended solids (TSS), chemical oxygen demand (COD), total phosphorus, total nitrogen, total sulphur and heavy metal ions and compared to Kenyan effluent discharge standards. The results were as follows: pH 6.48 6.89, temperature 28.0728.30 C, COD 916.77-1881.20 mg/L, total phosphorus 145.00-149.32 mg/L, TSS 6382.33-7395.33 mg/L, oil and grease 3525.00-6374.33 mg/L, total sulphur 72.62-73.41 mg/L, total nitrogen 1586.67-4442.67 mg/L. Heavy metal concentrations were 3.03-4.18 mg/L, 2.07-3.04 mg/L and 5.38-17.21mg/L respectively for cadmium, chromium and lead. Adsorbent was made from waste rubber tyres and tested for its suitability in removing three heavy metal ions namely cadmium, lead and chromium from the effluent samples by varying adsorbent dosage, pH and contact time. Keywords— Physico-chemical, Effluents, Adsorbent