Physico-Chemical Characterization and Pollution Index Determination of Leachates from Warri Waste Dumpsite, Southern Nigeria

Abstract

This study characterizes the leachates quality of an active dumpsite in Warri, Delta State and also analyses its contamination or pollution potential. Leachate Pollution Index (LPI) -a tool for quantifying pollution potential of leachates generated from dumpsites -has been used to quantify the leachates contamination potential of the dumpsite. The LPI values for the different sample locations L1, L2 and L3 were computed to be 5.69, 6.18 and 5.89 respectively with a mean value of 5.80, while the control had a value of 4.82. These LPI values were also compared with the LPI standard (7.38) for treated leachates. Comparison of the mean LPI value (5.80) with the standard (7.38) indicated a relatively low contamination potential of the leachates. Moreover, it was observed that the concentration of the individual parameters of the leachates is quite variable. The organic strength (BOD 5 divided by COD) of the dumpsite was less than 0.5, while the pH values indicated that all sample locations in terms of age was mature, an indication of dumpsite stabilization. The study recommends continuous monitoring of leachates and upgrade to an engineered landfill to forestall possible pollution problems in future. ©JASEM

Environmental assessment of solid waste dump site

“…Leachate Pollution Index : LPI was calculated for Leachate from leachate collection tanks 1 and 2 of the sanitary landfill. The LPI values determined from 1 and 2 are compared with LPI standard for disposal proposed under Municipal Solid Waste (Management and Handling) Rules (2000) (Agbozu et al, 2015;Barjinder et al, 2014). The calculated LPI values L1 and L2 are 15.82 and 18.03 and the standard LPI value was 7.378.…”

A Comparative Study on the Effects of Leachate on Groundwater in Selected Dumpsites in Rivers State, Nigeria

“…The LPI was expressed as shown in equation 1 [16,24]. 3content in the leachate was determined using the Stannous method [25].…”

“…Many developed nations have been able to address the problem of leachate production in waste dumpsites through sanitary landfill systems, various wastes to wealth agenda and modern waste recycling and reuse technology [8, 9,10,11,12]. Many studies have been carried out on dumpsites in Nigeria [13,14,15,16,17,18,19] but these are dumpsite specific. Sackey and Meizah [20] revealed that waste dumpsites can be grouped into three distinctive grades by their ages (young, intermediate and old), which influence contamination levels.…”

“…The dumpsites between 5 to 10 years are classified as intermediate with attendant COD of 3,000 to 15,000 mg/l and the very old dumpsites above 10 years have less biodegradation with attendant COD of less than 2,000 mg/l. Agbozu et al [16] stated that Nigeria generates about 25 million tonnes of municipal solid wastes (MSW) in a year and forecasted that MSW would increase due to the uncontrolled population growth and fast urbanization. One overwhelming challenge to environmentalists and government of the developing countries is the poor handling of MSW and the leachate percolation to groundwater aquifer from wastes dumpsites [14,17,12].…”

Composição gravimétrica e estimativa de geração per capita municipal de resíduos sólidos urbanos destinados ao Aterro Sanitário de Palmeira das Missões, Rio Grande do Sul, Brasil

“…Este cenário é decorrente do aumento considerável da urbanização, do padrão de consumo e da mudança de hábitos alimentares, características evidenciadas, principalmente nos países em desenvolvimento. Neste cenário, torna-se cada vez mais necessária uma gestão de resíduos sólidos eficiente, demandando conhecimento e alternativas para que o destino final dos RSU seja ambientalmente correto, consequentemente reduzindo impactos ambientais (Agbozu et al, 2015;Khan et al, 2016) e a utilização de novas áreas (Wang et al, 2018), mitigando mudanças climáticas e reciclando recursos (Wang et al, 2020).…”