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1.
混凝-催化氧化处理含油污水实验研究 总被引：2，自引：0，他引：2
采用复合化学混凝及催化氧化联合工艺对油田生产废水进行了实验研究.结果表明:含油废水经混凝处理后,剩余ρ(CODcr )可以达到300 mg/L左右,剩余悬浮物质量浓度小于10mg/L;再经活性炭载Cu、Pd催化剂的深度处理,含油污水中的ρ(CODcr )值由315 mg/L降至50 mg/L以下,达到了国家的相关排放标准.催化剂可以再生重复使用. 相似文献
2.
以水源水为处理对象,通过对沸石进行酸、盐、高温改性和氨氮去除试验,考察沸石粒径、接触时间、温度等因素对氨氮去除的影响。结果表明,经盐(NaCl)改性的沸石对氨氮有较高的去除率,对于氨氮浓度为4.43mg/L的水源水,在粒径0.8～1.7mm、温度25℃的条件下,经15min接触,氨氮浓度可降至0.3mg/L,去除率可达93.2%。改性沸石对氨氮的去除机理是沸石表面(及内部孔隙)吸附作用和离子交换作用。对于普通自来水厂,只需将快滤池中常用的石英砂部分替换成改性沸石即可有效去除饮用水中的氨氮。经测算其投资仅增加33～39元/m3,运行费用基本不变。 相似文献
3.
对二级天然沸石曝气生物滤柱的脱氮性能和生物再生进行了实验研究.研究结果表明,在进水有机负荷0.8～6.4 kgCOD/(m3·d)、水力负荷1～2 m/h、气水比1:1～4:1的工艺条件下,COD、氨氮和总氮去除率分别达到67%～90%、52%～82%和33%～67%;水中氨氮含量在10～30mg/L时,硝化速率为0.23mg/min.生物再生过程中,微生物不仅硝化解吸氨氮,还可以深入沸石孔道,直接利用沸石吸附的氨氮.分级分段进水可以提高沸石生物再生速度,减少再生时间. 相似文献
4.
将混入污染物和杂质的地热尾水直接排向地表水体,会造成水、土环境污染,也会造成水资源的浪费。为高效减少地热尾水中污染物,实现供暖地热尾水的无害化排放,以林甸县花园镇供暖地热尾水为例,通过混凝沉淀、超滤、纳滤工艺开展供暖尾水处理的室内实验和中试试验研究,连续监测获取地热尾水各处理工艺运行参数,组合工艺稳定运行期间监测到溶解性总固体浓度由5 824.7 mg/L降为432.40 mg/L、氯化物浓度由3 010.13 mg/L降为194.16 mg/L、氟化物浓度由1.57 mg/L降为0.31 mg/L、硼浓度由4.04 mg/L降为1.62 mg/L。确定该区地热尾水处理的最佳组合工艺为采用超滤运行压力为0.1 MPa,纳滤膜为陶氏NF90,操作压力为0.60 MPa,进水量为0.8 m3/h。室内实验溶解性总固体去除率90.21%～92.49%,氯化物去除率91.63%～93.02%,氟化物去除率96.81%,硼去除率55.20%～55.69%。中试试验溶解性总固体去除率为92.62%;氯化物浓度200 mg/L,氯化物去除率为92.57%;硼浓度1.77 mg/L,硼去除率为55.7%,以上实验结果均达到相关规范标准。试验证明本工艺处理松嫩盆地北部林甸地热田供暖尾水是可行的,解决了供暖尾水处理中资源浪费和尾水回收利用的技术性问题,为地热资源可持续利用提供了新的途径。 相似文献
5.
由于人口增长和经济建设的扩大,水生态环境系统遭到严重破坏,沿河农村和工矿企业对河道水体的影响尤为严重。作为衡量水体污染程度的重要指标之一,水体中的氨氮和有机污染物对生态环境和人类身心健康造成一定影响,环境治理和水生态系统修复治理迫在眉睫。加之沿河工矿企业生产废水流入河道内,导致河道水体的污染具有多重性和复杂性。根据山西省阳泉市郊区温河治理水质提升工程为例,通过“高效生态浮岛+复合曝气生物膜修复”多方位立体式水生态净化技术和新型绿色生物膜修复技术,最终净化塘出水氨氮≤1.1mg/L,总氮≤1.3mg/L,水质指标达到地表Ⅳ类标准。运行成本0.12元/m3,低于同类型最新技术“底泥生物氧化技术”运行成本的3～4倍,值得应用推广。 相似文献
6.
污染河水中氨氮对浅层地下水的影响 总被引：14，自引：2，他引：12
氨氮是目前地表水和地下水的一个重要污染源.室内试验选用3种天然砂土作为渗透介质, 以生活污水模拟污染河水, 经过近1 0个月的土柱试验, 发现氨氮在粗砂中第1 7天达吸附饱和, 第1 8— 1 4 0天去除率小于1 0 %, 在中砂中第1 30—1 4 0天吸附饱和, 以后均发生解吸出水浓度大于进水浓度.野外实验凉水河的氨氮浓度为4 6.86mg/L和2 6.95mg/L时, 地下水的氨氮浓度均小于1.1 0mg/L, 表明凉水河对地下水的实际影响不如室内大, 原因是底泥、河床下部渗透介质的厚度和岩性以及河水渗漏量的影响.排污河还清试验表明, 排污河清淤、灌入清水后, 会很明显地把排污河下部渗透介质中的氨氮带到地下水中, 造成地下水的二次污染. 相似文献
7.
为了研究浅水湖泊水上煤田钻探工程中可能发生的钻井液泄漏对水体的污染情况,以淮南顾北矿港河水上勘探为例,实测分析了不同浓度钻井液对污染指标和鲫鱼存活的影响,其中污染指标包括pH值、悬浮物、CODcr、总Cr和Cd。采用保守物质的对流扩散方程,对钻井液输移扩散进行了数值模拟。研究发现,当钻井液浓度小于1 000mg/L时,所测试的污染指标基本上能够达到二级排放标准;当钻井液浓度达到5000mg/L时,鲫鱼死亡率约为原水中养殖的正常死亡率的2倍;钻井液在扩散初期其浓度迅速减少,且水流整体流速越大,则钻井液扩散越快,在扩散后期钻井液会形成高浓度聚集区,钻井液浓度的衰减变慢。 相似文献
8.
本文研究了1985～1986年四季次珠江口外及其邻近海域1000个以上的海水悬浮物样品。采用了“微孔滤膜法”取得数据,其平均含量秋冬两季高(25～26mg/l),春夏两季低(13～18mg/l)。向外海明显降低,但在100～200m水深处存在高含量小区。垂直变化都是由表层向底层增加。悬浮物质优势成分是矿物,次为无定形生物与生物源颗粒。矿物成分以粘土为主。生物源颗粒以硅藻为主。同时,讨论悬浮物质时空分布的控制因素。 相似文献
9.
《地下水》2021,(4)
电吸附工作流量的增大会引起对流作用、流体对电子的迁移作用和电吸附设备的吸附能力随之增强。为探究工作流量对电吸附设备出水环境质量的影响,通过试验将多种工作流量下电吸附设备对氨氮、化学需氧量的去除率进行比对,并分析得水率能耗,进而确定适宜的流量。研究结果显示:在进水条件、工作时间、反洗流量和反洗时间等参数固定时,随着工作流量的增大各指标的去除率下降,而随着工作流量增大除盐效果会变差。根据/h,在工作流量=500 L/h时能耗1. 57/m3,得水率81. 1%,除盐率75%;结合产水效率和电吸附的除盐性能,反洗操作参数可定为反洗流量为700/h、反洗时间为32 min;稳定运行阶段,电吸附除盐、氨氮、COD效果稳定,且出水的电导率在400μS/cm左右,氯离/L左右,出水氨氮浓度小于5 mg/L,COD浓度在25 mg/L左右,符合敞开式循环冷却水补充水标准。试验结论对后期进一步研究提供了基础理论依据。 相似文献
10.
百花湖水体氮的空间分布研究 总被引：2，自引：1，他引：1
初步探讨了百花湖水体中氮的空间分布特征,并分析了氮及溶解氧(DO)的相关性。对8个站位的表层、4m、8m及12m水体中总氮、氨氮、硝酸盐氮、亚硝酸盐氮及溶解氧进行了测定。结果表明,百花湖水体中总氮的平均含量为1.18mg/L,氨氮的平均含量为0.144mg/L,硝酸盐氮的平均含量为0.20mg/L,亚硝酸盐氮的平均含量为0.018mg/L。百花湖入湖口附近的1号采样点总氮、氨氮和硝酸盐氮的平均浓度都较其它采样点高。分析表明百花湖中DO浓度与硝酸盐氮和亚硝酸盐氮呈负相关,相关系数分别为-0.629、-0.724。 相似文献
11.
Lam Van Nguyen Ngoc Kim Nguyen Hoan Van Hoang Tuan Quang Tran Nga Trong Vu 《Environmental Earth Sciences》2013,70(2):501-510
The groundwater in the karst region of northeastern Vietnam is found in various structural zones such as the Ha Lang, Song Hien, Hon Gai, Song Lo, Song Gam, and Hoang Lien Son Zones, etc. Results from this study show that groundwater in this region is at different depths: ~120 m deep at Quang Ninh, ~100 m at Lang Son, ~80 m at Cao Bang (The most water-abundant depth observed at Cao Bang varies from 40 to 45 m) while it varies from 18–25 to 80 m deep at Quan Ba (Ha Giang), especially at Meo Vac (Ha Giang), where groundwater is observed at 700–800 m deep (equivalent to local base level of the Nho Que River). Overall, groundwater in the region is fresh with total minerals varying from 250 to 400 mg/l; except for the coastal area of Quang Ninh, where groundwater is characterized by much higher total minerals (M = 3–18 g/l) due to the mixing with the saline sea water. The chemistry of water in the region demonstrates that the water is mainly bicarbonate with a [HCO3 ?] concentration varying from 150 to 265 mg/l, pH is of 6.5–8.1, and its hardness is of 3.7–6.0 meq/l. 相似文献
12.
Geochemical assessment of groundwater quality in vicinity of Bhalswa landfill,Delhi, India,using graphical and multivariate statistical methods 总被引：1，自引：0，他引：1
A geochemical assessment of groundwater quality and possible contamination in the vicinity of the Bhalswa landfill site was
carried out by using a hydrochemical approach with graphical and multivariate statistical methods with the objective of identifying
the occurrence of various geochemical processes and understanding the impact of landfill leachates on groundwater quality.
Results indicate that nitrate, fluoride and heavy-metal pollution are in an alarming state with respect to the use of groundwater
for drinking purposes. Various graphical plots and statistical analyses have been applied to the chemical data based on the
ionic constituents, water types, and hydrochemical facies to infer the impact of the landfill on groundwater quality. The
statistical analysis and spatial and temporal variations indicate the leaching of contaminants from the landfill to the groundwater
aquifer system. The concentrations of heavy metals in the landfill leachates are as follows: Fe (22 mg/l), Mn (~20 mg/l),
Cu (~10 mg/l), Pb (~2 mg/l), Ni (0.25 mg/l), Zn (~10 mg/l), Cd (~0.2 mg/l), Cl− (~4,000 mg/l), SO42− (~3,320 mg/l), PO43− (~4 mg/l), NO3− (30 mg/l) and fluoride (~50 mg/l); all were much higher than the standards. The study reveals that the landfill is in a depleted
phase and is affecting groundwater quality in its vicinity and the surrounding area due to leaching of contaminants. 相似文献
13.
Rio Marina mining district (Elba Island) is characterised by hematite + pyrite ore association and was exploited for iron till 1981, leaving waste rock dumps of several millions m3. The effect of open pit mining activity in this site is to produce acid mine drainage (AMD) processes leading to environmental pollution, testified by all the sampled waters (Giove stream, drainage channels, superficial pools and settling basin) which have pH values ranging from 2.08 to 3.35 and heavy metal concentrations that reach 903.16 mg/l for Fe, 45.02 mg/l for Mn, 10.08 mg/l for Zn and 1.75 mg/l for Cu. In the present work a space and time related approach to geochemical hazard evaluation was applied. The geochemical hazard is mainly related to high heavy metal concentration, acid mine drainage processes development and topographic setting. As all these parameters are related in space, hazard evaluation was performed by geostatistical methods. Fifty-four earth material samples (residual soils, waste rocks or debris materials) were collected in a central aligned 100 m mesh square grid. These were analysed for major elements by XRF, for Cu, Pb, Zn by ICP-AES and for AMD potential following the AMIRA procedure. The concentration of heavy metals was compared with Italian law limits. The overlap of Cu, Pb and Zn content maps show that at least one of these heavy metals exceed law limits in all the area. The AMD test results show that more than 50% of samples have a positive NAPP (Net Acid Producing Potential) that could reach 258.9 kg H2SO4/t. According to the obtained data, three main geochemical hazard classes were established and their distribution in the mining area was assessed. About 51% of the mining area surface belongs to the major hazard class, where AMD process occurs, about 49% belongs to an intermediate hazard class, where AMD process could occur only if certain conditions are met. Finally, the persistence of the AMD process in the Rio Marina area was evaluated on the basis of yearly rainfall, mining waters pH and NAPP values. A complete leaching of the first 0.25 m of the earth materials can retain the current environmental conditions for several centuries. 相似文献
14.
Geochemical study of arsenic and other trace elements in groundwater and sediments of the Old Brahmaputra River Plain,Bangladesh 总被引：1，自引：1，他引：0
Faruque Ahmed M. Hawa Bibi Hiroaki Ishiga Takehiko Fukushima Teruyuki Maruoka 《Environmental Earth Sciences》2010,60(6):1303-1316
The geochemical study of groundwaters and core sediments from the Old Brahmaputra plain of Bangladesh was conducted to investigate
the distribution of arsenic and related trace elements. Groundwaters from tube wells are characterized by pH of 6.4–7.4, dissolved
oxygen (DO) of 0.8–1.8 mg/l, Ca contents of 5–50 mg/l, and Fe contents of 0.2–12.9 mg/l. Arsenic concentrations ranged from
8 to 251 μg/l, with an average value of 63 μg/l. A strong positive correlation exists between As and Fe (r
2 = 0.802; p = 0.001) concentrations in groundwater. The stratigraphic sequences in the cores consist of yellowish silty clays at top,
passing downward into grayish to yellowish clays and sands. The uppermost 3 m and lower parts (from 13 to 31 m) of the core
sediments are oxidized (average oxidation reduction potential (ORP) +170 and +220 mV, respectively), and the ORP values gradually
become negative from 3 to 13 m depths (−35 to −180 mV), indicating that anoxic conditions prevail in the shallow aquifers
of the Brahmaputra plain. Age determinations suggest that clay horizons at ~10 m depth were deposited at around 2,000 and
5,000 years BP (14C ages) during the transgressive phase of sea-level change. Elevated concentrations of As, Pb, Zn, Cu, Ni, Cr, and V are present
in the silts and clays, probably due to adsorption onto clay particles. Significant concentrations of As occur in black peat
and peaty sediments at depths between 9 and 13 m. A strong positive correlation between As and Fe was found in the sediments,
indicating As may be adsorbed onto Fe oxides in aquifer sediments. 相似文献
15.
Toxicity characteristic leaching procedure (TCLP) is a versatile short-term leaching protocol used to estimate the release of toxic metals from waste prior to disposal to a repository. This paper uses the integrated TCLP leachate data from tailings, tailings dam monitoring borehole data, and acidity ratio (AR) range of sulphide-rich ores to simulate the environmental TCLP As in tailings at the AngloGold Ashanti Obuasi mine in Ghana. The aim was to incorporate long-term leaching characteristics of tailings to minimise the risk of TCLP As test failure. The mean As concentration and pH value are 2.26 mg/l and 5.7 in TCLP leachate, 0.35 mg/l and 6.7 in monitoring boreholes, and?<?0.01 mg/l and 5.7 in control boreholes, respectively. The evaluation of the TCLP As data using a one-sample t test performed at 80% confidence interval has the upper confidence limit (UCL) of 2.41 mg/l; this value which constitutes the short-term characterised environmental TCLP As is below the USEPA criterion of 5 mg/l and, therefore, qualifies the waste as safe for disposal. Alternatively, TCLP leachate, borehole and AR data were integrated to simulate the long-term environmental TCLP As of 2.40 mg/l and pH value of 5.7, and As concentration and pH value of 0.01 mg/l and 6.7 in monitoring boreholes, respectively. Such laboratory simulations of TCLP As leaching aimed at achieving 0.01 mg/l in field monitoring data would provide a more robust predictive value for environmental management decision making due to long-term considerations. 相似文献
16.
Until this study, the location and depth of the saline units in Uburu-Okposi salt lake areas and environs have been unknown. This study aimed at delineating the saline lithofacies and dispersal configurations to water bodies, using electrical geophysical methods such as constant separation traversing (CST) and vertical electrical sounding (VES). Results showed weathered zones that represent aquifers mostly at the fourth geoelectric layer: between upper layered aquitards and underlying aquitards at depths 30–140 m. Lateral distribution of resistivity variance was defined by the CST, whereas the VES tool, targeted at low-resistivity zones, detected isolated saline units with less than 10 ohm-m at depths generally >78 m. The saline lithofacies were suspected to link freshwater zones via shear zones, which steer saline water towards the salt lakes and influence the vulnerability of groundwater to salinization. The level of salinization was verified by water sampling and analysis, and results showed general alkaline water type with a mean pH of 7.66. Water pollution was indicated: mean total dissolved solids (TDS) 550 mg/l, electrical conductivity (EC) 510 μS/cm, salinity 1.1‰, Cl? 200 mg/l, N03 ?35.5 mg/l, Na+ 19.6 mg/l and Ca2+ 79.3 mg/l. The salinity is controlled by NaCl salt, as deduced from correlation analysis using the software package Statistical Product for Service Solutions (SPSS). Generally, concentrations of dissolved ions in the water of the area are enhanced via mechanisms such as evaporation, dissociation of salts, precipitation run off and leaching of dissolved rock minerals. 相似文献
17.
Ecological restoration of the Wangaloa coal mine in southern New Zealand is hindered by a range of geoecological factors.
The site has some substrate acidification (down to pH 1) and acid rock drainage with discharge waters initially down to pH
4, although this has since risen to ca. pH 6. Surface and ground waters develop elevated sulfate (up to 700 mg/kg) during
oxidation of pyrite in coal and quartz in waste rock. Coal has elevated boron content (up to 450 mg/kg) and surface waters
on coal-rich waste rock have up to 6 mg/L dissolved boron. Evaporation causes formation of salt encrustations dominated by
gypsum with minor boron salts. Boron is bioavailable and may be at toxic levels (>200 mg/kg) in some plants. Quartz-rich waste
rock is readily eroded, and develops a cm-scale low-nutrient quartz pebble armouring layer with low water retention properties.
All waste rocks including loess siltstone have low nutrient contents, and low moisture retention properties, that are barely
sufficient for plant establishment. Native plants introduced to the site during rehabilitation have grown on loess substrate
(up to fivefold increase in height over 3 years), with poor or no growth on coal-rich and quartz-rich substrates. In contrast,
natural colonisation of manuka (Leptospermum scoparium) has been most effective at revegetation on even the most hostile substrates. This natural revegetation has been facilitated
by islands of manuka established accidentally during 60 years of mining history. Manuka from local genetic stock is most viable
for this revegetation, and introduced manuka seedlings have had a 70% mortality rate. Natural plant colonisation is the key
step in overall ecosystem recovery, and invertebrates rapidly colonise beneath new shrubs irrespective of the nature of the
substrate from vegetation islands that have high invertebrate numbers and species richness. 相似文献
18.
Assessment and prediction of contaminant migration in ground water from chromite waste dump 总被引：3，自引：0，他引：3
Sukinda chromite valley is one of the largest chromite deposits of the country and produces nearly 8% of chromite ore. It
greatly contributes towards the economic development but at the same time deteriorates the natural environment. It is generally
excavated by opencast mining method. In the Sukinda mining area, around 7.6 million tons of solid waste have been generated
in the form of rejected minerals, overburden material/waste rock and sub-grade ore that may be resulting in environmental
degradation, mainly causing lowering in the water table vis-à-vis deterioration in surface and ground water quality. The study
conducted in and around one of the chromite mine of the valley reveals that the concentration of hexavalent chromium is found
in the water samples of ground and surface water, mine effluents and seepage water. Hexavalent Chromium (Cr+6) have been found varying between 0.02 mg/l and 0.12 mg/l in mine effluents and 0.03–0.8 mg/l in shallow hand pumps and 0.05
and 1.22 mg/l in quarry seepage. The concentration of Cr+6 in Damsal nalah, the main surface water source in the area, is found varying between 0.03 mg/l and 0.14 mg/l and a increasing
trend, which is in the downstream of mining activities, has been observed. Leachate study clearly shows that the soil lying
in the vicinity of mine waste dump shows highest concentration of Cr+6. Contaminant migration in ground water depends upon various geohydrological conditions of the area. The study shows that
aquifer resistivity varies between 15 Ωm to 150 Ωm and aquifer depth varies from 4 m to 26 m below ground level. The ground
water flow and mass transport models were constructed with the help of geo-hydrological and geophysical informations using
Visual Modflow software. Contaminant migration and path lines for 20 years have been predicted in two layers model of ground
water. The study provided an insight into the likely migration of contaminant in ground water due to leaching from overburden
dump of chromite ore and will be helpful in making strategic planning for limiting the contaminant migration in the ground
water regime in and around the mining areas. 相似文献
19.
Y.K. Kharaka A.S. Maest W.W. Carothers L.M. Law P.J. Lamothe T.L. Fries 《Applied Geochemistry》1987,2(5-6)
Oil-field brines are the most favored ore-forming solutions for the sediment-hosted Mississippi Valley-type ore deposits. Detailed inorganic and organic chemical and isotope analyses of water and gas samples from six oil fields in central Mississippi, one of the very few areas with high metal brines, were conducted to study the inorganic and organic complexes responsible for the high concentrations of these metals. The samples were obtained from production zones consisting of sandstone and limestone that range in depth from 1900 to 4000 m (70–120°C) and in age from Late Cretaceous to Late Jurassic. Results show that the waters are dominantly bittern brines related to the Louann Salt. The brines have extremely high salinities that range from 160,000 to 320,000 mg/l total dissolved solids and are NaCaCl-type waters with very high concentrations of Ca (up to 48,000 mg/l) and other alkaline-earth metals, but with low concentrations of aliphatic acid anions. The concentrations of metals in many water samples are very high, reaching values of 70 mg/l for Pb, 245 mg/l for Zn, 465 mg/l for Fe and 210 mg/l for Mn. The samples with high metal contents have extremely low concentrations (<0.02 mg/l) of H2S. Samples obtained from the Smackover Formation (limestone) have low metal contents that are more typical of oil-field waters, but have very high concentrations (up to 85 mg/l) of H2S. Computations with the geochemical code SOLMINEQ.87 give the following results: (1) both Pb and Zn are present predominantly as aqueous chloride complexes (mainly as PbCl42− and ZnCl42−, respectively); (2) the concentrations of metals complexed with short-chained aliphatic acid anions and reduced S species are minor; (3) organic acid anions are important in controlling the concentrations of metals because they affect the pH and buffer capacity of the waters at subsurface conditions; and (4) galena and sphalerite solubilities control the concentrations of Pb and Zn in these waters. 相似文献
20.
Nuran Cikcikoglu Yildirim Deniz Demirbilek Gokhan Onder Erguven Rahime Kayar Senay Basaran Dilan Tulpar 《Environmental Earth Sciences》2018,77(17):622
Leachate was a major cause of high risk classification. This landfill was set as one with highest possible risk classification due to high vulnerability of private water wells to contamination from leachate flows. The aim of this study is to determine the present and possible environmental risks of the leachate spreading from solid waste dumping site in Tunceli and offer solutions for those determined environmental risks. For this purpose, the characteristics of the leachate were monitored at two station points detected in the solid waste dumping site for 7 months. The characteristics of the leachate were found for pH between 7.9 and 8.7. Oxidation reduction potential (ORP) occurred between ??143 and ??48 mV while conductivity was between 2.8 and 2.6 mS. Total solid matter (TSM) and suspended solid matter (SSM) were between 1000 and 7000 mg/l, 0.2–22.5 mg/l, respectively, while total volatile solids (TVS) occurred between 300 and 1800 mg/l for the two stations. Alkalinity was approximately between 290 and 5210 mg/l, while biological oxygen demand (BOD5) and chemical oxygen demand (COD) results were 15–606 mg/l and 60–1160 mg/l, respectively, for two stations in all sampling time. In both stations, orthophosphate, ammonium nitrogen, nitrate, sulfate, and chloride analyses stayed between 3.04 and 921.1 mg/l; 0.29–619.36 mg/l; 8.94–135.04 mg/l; 125.9–1360.9 mg/l and 99.9–1249.9 mg/l, respectively, in 6 months. As a result of the characterization studies obtained from the leachate, it was found that the amounts of water entering into the waste mass and the retention period of the water in the mass were very effective in the temporal character change of the leachate. According to the Discharge Standards for Solid Waste Assessment and Disposal Facilities and Discharge to Waste Water Infrastructure Facilities of waste management regulation, the results were found to be risky. Consequently, the site in question needs to be urgently rehabilitated when considering the environmental risks of the leachate spreading from the site. 相似文献