The dumping of solid waste in uncontrolled landfills can cause significant impacts on the environment and human health. The principal concern is focused on the pollution potential due to migration of the leachate generated from the landfill sites into the groundwater, the surface water or the sea. In this study, used of a technique that has been developed to quantify the landfill leachate pollution using an index known as Leachate Pollution Index (LPI). Also, monitoring of leachate quality was carried out at three dump sites as Talesh, Roudsar, and Ferydounkenar from cities of northern Iran. The leachates were monitored for changes in pH, TDS, COD, BOD, TKN, Ammonia-Nitrogen, and heavy metals. Leachate Pollution Index (LPI) for Talesh, Roudsar, and Frydunkenar leachate was 23.64, 27.51, and 17.96, respectively. These results showed that Roudsar leachate is more polluted than Talesh, and Frydunkenar leachate. Further, leachates of three dump sites showed that higher LPI value those than of 7.4 obtained for the treated leachate that can be disposed into inland surface water  are more.

Background and Aims: Municipal landfill leachate is toxic due to its complex organic and inorganic compounds, demonstrating a high potential for pollution. Estimating the leachate pollution index (LPI) is crucial for predicting the long-term effects of leachate on the environment and for proposing suitable management and treatment solutions. Therefore, this study investigates the leachate pollution index (LPI) of the municipal waste landfill in Sanandaj. Materials and Methods: Six samples from the leachate storage pond situated downstream of Sanandaj municipal landfill were collected during the winter and spring seasons. Physicochemical analyses were conducted to determine the characteristics of the leachate. The leachate pollution index was calculated and evaluated based on 18 parameters, including pH, TDS, BOD, COD, TKN, NH4, Fe, Cu, Ni, Zn, Pb, Cr, Hg, As, phenolic compounds, chloride, cyanide, and total coliform bacteria. Ethical and research considerations were taken into account at all stages of the study. Results: The findings of this study revealed elevated concentrations of pH, COD, BOD, TKN, and NH4 in the leachate from the landfill being studied. Furthermore, the leachate pollution index, calculated from the measured parameters, was determined to be 30. 19. Conclusion: The results of this study indicated that the leachate pollution index of the investigated site was slightly higher as compared to the corresponding values in active landfills,however, it was significantly elevated in comparison to closed landfills and the guideline LPI values for discharge into the environment and surface water. The high LPI indicates that the leachate in question is hazardous and has a high pollution potential, necessitating treatment before being discharged into the environment.

Landfill leachates are potential threats for environmental degradation. This study was conducted to determine the leachate quality, to identify the dominant pollutants and to evaluate the leachate pollution potential of an active and closed dumping ground of an uncontrolled municipal solid waste (MSW) landfill site in Kolkata, India using leachate pollution index. The results of the physico-chemical and biological analyses of leachate indicated that landfill site was in its methanogenic phase. Among the analysed leachate pollutants, TDS, BOD5, COD, TKN, NH3-N, Cl¯, TCB, Pb, and Hg surpassed the leachate discharge standards for inland surface water as specified by the municipal solid waste (management and handling) rules, 2013 for both the dumping grounds. Moreover the concentrations of total Cr and Zn also exceeded the leachate disposal standards for the active dumping ground. The leachate pollution potentialities of both the active and closed dumping grounds were comparable as the overall LPI obtained 34.02 and 31.80 respectively. The overall LPI, LPI organic (LPIor), LPI inorganic (LPIin) and LPI heavy metals (LPIhm) of both the dumping grounds largely exceeded the LPI and sub-LPI values for treated leachate before disposal to the inland surface water. In terms of the individual pollution rating, total coliform bacteria, TKN, NH3-N and Hg were identified as the dominant pollutants and major contributing factors for the leachate pollution potential.

Landfills can be considered as a potential threat to groundwater resources, considering the potential of groundwater pollution by leachate with the pollutants such as hydrocarbons and heavy metals. In this study, spatial changes in groundwater quality used in agriculture, in the vicinity of landfill site of municipal solid wastes in the southwest of Zanjan city were investigated. For this purpose, analysis of 18 physicochemical, heavy metals and bacterial parameters in leachate and 14 groundwater samples were investigated around the dumpsite up to a 5 km radius from landfill during two sampling periods (i. e., December 2020 and June 2011). In this study, several indices including leachate pollution index, sodium absorption ratio, Killie index, soluble sodium percentage and permeability index were used to investigate groundwater pollution in the study area due to leachate or other sources. According to the results of LPI, none of the groundwater samples were polluted with leachate. Also, the quality of these resources for use in agriculture was evaluated favorably according to SAR, KR and PI indices, however, according to SSP, 64% and 86% of samples during December 2020 and June 2021, respectively, were reported polluted. In general, the results of qualitative study of groundwater samples in dry season (December 2020) were more pronounced than pollutants. Although based on the results of agricultural indicators and LPI in well number 5 as the closest well to the landfill, no contamination by leachate has been reported, however the high chlorine concentration which was at maximum of allowed range, the potential dangers of landfill leachate were shown. It is noted that chlorine acts as a leachate detector in groundwater. Therefore it is recommended that monitoring wells be dug at different depths and at distances of less than one kilometer from the landfill, and sampling be done in successive periods to determine even the smallest effects of leachate on groundwater.

This article evaluates Iran’ s LPI and its six components/indicators for biennial periods from 2007 to 2018 and introduces some recommendations for its improvement. In comparison to other countries, Iran’ s LPI for biennial periods of the last decade (2007-2018) has been generally unfavorable. However, although it has been falling from 2007 to 2012, it has significantly been rising from 2012 to 2018. With the LPI rated from 1 (worst) to 5 (best) and the LPI scores categorized into four ascending categories of logistics-unfriendly, partial performers, consistent performers, and logistics-friendly, Iran with its LPI average score of 2. 6 (out of 5) during 2010-2018 falls under the partial performers category (low-and middle-income countries with similar constraints). Hence, a small decrease in Iran’ s LPI score may relegate it to the logistics-unfriendly category (countries with the worst LPI score or least developed countries). In this context, the four indicators with great negative effect on Iran’ s LPI have been “ ease of arranging competitively priced shipments” , “ ability to track and trace consignments” , “ frequency with which shipments reach consignees within scheduled or expected delivery times” and “ efficiency of customs and border management clearance” . In contrast, the two indicators reinforcing Iran’ s LPI have been “ competence and quality of logistics services” and “ quality of trade and transport infrastructure” . In fact, with these very levels of the latter two indicators, an appropriate re-allocation of the former four indicators may improve Iran’ s LPI status.

Background and Objective: Study of landfill of urban solid wastes is important because of its different kind of pollution. The most important pollutants of landfill, is leachate of the resulting from solid wastes. Solid waste leachate may penetrate into surface and underground water and pollute these resources.This place is located near one of Siahroud River branch. And is named Zarjoub. This river evacuates the pollution resulting from solid waste leachate with other urban, industrial and agricultural pollutants at Anzali wetland.Methods: In this research, the qualification of Rasht landfill and Kacha River were studied for leachate contamination. For purpose BOD, DO, PH, TP and COD parameters were studied in two humid and arid seasons.Findings: The averages of COD, BOD, Do and TP in river are 3862.5 and 1326.25, 0.3 and 6.5 Mg/L. Also the average of pH is 7.01.Discussion and Counclusion: The results show that observed amounts are higher than the standards of environmental protection organization. Furthermore, the pollution resulting from leachate showed remarkable increase in comparison with the results of experiments of 1997.

With increased population, rapid industrialization and life style changes, the characteristics and the rates of solid waste generation have gone under drastic change in India. Generally, in India, management of solid waste landfill is of major concern with respect to the existing circumstances. The illegal dumping of municipal solid waste on the outskirts of cities is creating major environmental and public health problems. Improper and unscientific waste management results in potential threats from leachate leakage with subsequent impact on environment (i. e. soil, air and waterbodies) and human being. It is therefore, important to evaluate the contamination potential threat of landfill leachate. This study assesses the potential contamination from the landfill leachate by an index called leachate pollution index (LPI) and suggestions are given the landfill sites of five major cities i. e. Bangalore, Chennai, Delhi, Navi Mumbai & Kolkata in India. The landfill leachate samples from these sites have been assessed using leachate pollution index for the implementation of appropriate leachate treatment techniques for reducing the adverse effects on the environment. The results show that the Pallikkaranai landfill site for Chennai city and Mavallipura landfill site for Bangalore city are highly deteriorating and may lead to increase in human health risk for nearby dwellings.

A monthly temporal monitoring of the physico-chemical parameters of the leachate from the Greater Casablanca “Mediouna” open-air landfill in Morocco over a period of 13 months was carried out to show their variability over time. This monitoring also highlights the effect of rainfall on leachate quality through fluctuations observed in wet and dry periods. Indeed, the leachate was sampled from a collector that drains a mixture of young and mature leachate. Several physico-chemical parameters were studied: pH, temperature, conductivity, organic matter (BOD5 and COD), total matter (TS, TVS), nitrogen (N-NO2-, N-NO3-, N-NH4+, TKN), total phosphorus (Tp), salts (Cl-, SO42-) and metals (Cd, Co, Cr, Ca, Cu, Fe, K, Mg, Mn, Ni, Pb, Zn). As a result, significant concentrations were recorded throughout the monitoring for the majority of the parameters, showing a high aggressiveness of the leachate. Also, statistically significant relationships were observed between the different parameters. On the other hand, the leachate pollution index (LPI) was calculated to determine the overall potential of leachate pollution. The identification and study of the behaviour of the physico-chemical parameters is very useful for the design of an adequate leachate treatment plant for the Greater Casablanca landfill "Mediouna", taking into consideration the extreme values recorded during the monitoring period, in order to avoid any malfunctioning due to an underestimation of the pollution.