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Home > Phytoremediation of Chromite Mining Contaminated Soils

Phytoremediation of Chromite Mining Contaminated Soils

Thesis Info

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Author

Nawab, Javed

Program

PhD

Institute

University of Peshawar

City

Peshawar

Province

KPK

Country

Pakistan

Thesis Completing Year

2014

Thesis Completion Status

Completed

Subject

Environmental Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/991

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676724924215

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Several anthropogenic and natural sources are considered as the primary sources of toxic metals in the environment. The present study was conducted to investigate heavy metal concentrations in soil and plants collected from the mafic and ultramafic rocks situated in Heroshah (Malakand Agency), Qala (Mohmand Agency) and Alpuri (Shangla District). In the study area, mafic and ultramafic rocks are hosting chromite deposits; therefore, both soil and plant samples were collected for chemical analyses. For the reclamation of mine impacted soil, different adsorption materials such as activated carbon powder (ACP), activated carbon granules (ACG) and farmyard manure (FYM) at different ratio (2 and 5%) were randomly mixed with the desired soil samples and plants were cultivated in the pots. Samples were analyzed for heavy metals i.e. arsenic (As), aluminum (Al), chromium (Cr), cadmium (Cd), copper (Cu), iron (Fe), nickel (Ni), manganese (Mn), cobalt (Co), zinc (Zn) and lead (Pb) using atomic absorption spectrometer (Perkin Elmer, AAS-PEA-700), ICP–OES (Perkin Elmer Optima 7000 DV, USA) and ICP-MS (Agilent Technologies, 7500 CX, USA). Currently, the most burning issue is the contamination of soil ecosystems and associated human health risks of heavy metals because of their adverse effects and toxicity. The findings of the current study were compared with the maximum allowable limits (MAL) set by various international organizations such as State Environmental Protection Administration of China (SEPA), World Health Organization (WHO) and Food Agriculture Organization (FAO). Different statistical tools were used for the identification of sources of selected heavy metals in the study area. Furthermore, the study aimed to select the best hyperaccumulative plant species and create awareness among the local population regarding potential health risk of heavy metal contamination. The current study investigates the level of heavy metals contamination in the flora associated with serpentine soil adjoining the Mafic and Ultramafic rocks Northern-Pakistan. Soil and wild native plant species were collected from chromites mining affected areas and analyzed for heavy metals (Cr, Ni, Fe, Mn, Co, Cu and Zn) using atomic absorption spectrometer (AAS-PEA- 700). The heavy metal concentrations were significantly (p<0.001) higher in mine impacted soil as compared to reference soil, however Cr and Ni exceeded maximum allowable limit (250 and 60 mg kg-1, respectively) set by SEPA for soil. Inter-metal correlations between soil, roots and shoots showed that the sources of metals contamination were mainly associated with chromites mining. All the plant species accumulated significantly higher concentrations of heavy metals as compared to reference plant. The open dumping of mine wastes could create serious metals contamination of food and drinking water sources for local community of the study area. The native wild plant species (Nepeta cataria, Impatiens bicolor royle, Tegetis minuta) growing on mining affected soils can be used for phytoremediation of affected soils contaminated with heavy metals. Medicinal, fodder plants and soil samples collected from the study area were analyzed for Pb and Cd concentrations using AAS Perkin Elmer, AAS-PEA-700. Soil pollution load indices (PLI) values more than 2 showing high contamination levels for both Cd and Pb. Furthermore, Cd concentrations in the soil surrounding the mining sites exceeded MAL (0.3 mg kg-1), while the concentrations of Pb were lower than its MAL set by SEPA for agriculture soil. The Pb and Cd concentrations were significantly higher (p<0.001) in soil of mining contaminated sites as compared to the reference site, which can be attributed to the dispersion of toxic heavy metals, present in the bed rocks and waste of the mines. The concentrations of Pb and Cd in majority of medicinal and fodder plant species grown in surrounding areas of mines were higher than their MALs set by WHO /FAO for herbal and edible plants. The high concentrations of Cd and Pb may cause contamination of the food chain and health risk. Phytoremediation is an environmentally friendly and economically feasible technique for the reclamation of environment polluted with toxic heavy metals. Therefore the next study was designed to evaluate the heavy metal concentration (Cr, Ni, Co, Fe, Mn, Cu and Zn) in chromite mining affected soil and native plant species by using AAS. The contaminated soils from Qala and Heroshah site soil showed multifold enrichment in heavy metals and PLI > 5. Soil and plant species from chromite affected areas have significantly (p<0.001) high metal concentrations as compared to reference site. Among the contaminated sites, Heroshah was highly contaminated than Qala. These high metal concentrations could be due to chromite mining and open dumping of mine wastes. High metal concentrations in the study area may cause potential threat to the local community and grazing animals. Phytoremediation potential of plant species like Solanum. surrattense, Dedonia. viscosa, Raziya. stracta, Calotropis. procera and Artemisia scoparia can be used to remediate chromite contaminated soils, though further investigation is still needed in terms of field and lab experiments. Organic amendment in soil has been proposed to immobilize heavy metals and minimize bioaccumulation. Another study was conducted to investigate the effects of different amendments (ACP2, ACP5, ACG2, ACG5, FYM2 and FYM5) on heavy metals such as (As, Cd, Ni, Cr, Pb, Mn, Cu, Fe, Zn, Co and Al) in mine impacted soil and plants cultivated under controlled conditions . The results showed that almost all the amendments significantly (p≤0.001) reduced the bioavailability of heavy metals in soil. The bioaccumulation of heavy metals by Penisitum americanum and Sorghum bicolor significantly (p≤0.001) reduced with all the amendment except (Zn and Cd) concentration increased with FYM2 and FYM5. The plant growth was significantly reduced with ACP2, ACP5, ACG2 and ACG5 amendment, while FYM2 and FYM5 significantly (p≤0.001) increased the plant growth as compared to the control. Among the amendments, ACP5 was the best one in reducing bioavailability and bioaccumulation of toxic metals in plants.
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پروفیسر رشید احمد صدیقی

پروفیسر رشید احمد صدیقی
افسوس ہے ابھی مولانا عبدالماجد دریابادی کے اشک ماتم خشک بھی نہیں ہوئے تھے کہ اردو ادب وانشا کے میدان کاایک اورشہسوار گرا یعنی پروفیسر رشید احمد صاحب صدیقی نے کم وبیش پچاسی برس کی عمر میں علی گڑھ میں وفات پائی اور وہیں سپردخاک ہوئے۔ مرحوم کا اصل وطن جونپور تھا لیکن طالب علمی کے زمانہ میں علی گڑھ آئے تو بس یہیں کے ہوکر رہ گئے، یہیں انھوں نے تعلیم حاصل کی۔ اُس زمانہ میں اردو میں ایم۔اے نہیں ہوتاتھا اس لیے فارسی میں ایم۔اے کیا، پھر یہیں اردوکے لیکچرر ہوئے اورایک عرصہ کے بعدریڈر بنے۔ڈاکٹر ذاکر حسین صاحب جن کومرحوم ہمیشہ مرشد کہتے اورلکھتے تھے اُن کی وائس چانسلری کے زمانہ میں پروفیسر ہوگئے لیکن اس عہدہ پرفائز ہوئے ابھی دو ہی برس ہوئے تھے کہ ملازمت سے سبکدوش کردیے گئے۔ یونیورسٹی کے قانون کے مطابق وہ ابھی توسیع کے مستحق تھے لیکن اس زمانہ میں یونیورسٹی میں جو سیاست چل رہی تھی وہ مانع ہوئی اور شیخ عبدالرشید(شعبۂ تاریخ)وغیرہ کے ساتھ یہ بھی ریٹائرڈ کرد یے گئے۔ مرحوم نہایت خوددار اورحساس تھے اس لیے انھوں نے شکوہ شکایت کسی سے نہیں کیا لیکن انھیں اس کااحساس عمر بھررہا چنانچہ وہ علی گڑھ میں ہی اپنے ذاتی طویل و عریض مکان میں ایسے گوشہ نشین ہوکربیٹھ گئے کہ نہ کبھی اردو ڈپارٹمنٹ میں قدم رکھا اورنہ یونیورسٹی کی کسی تقریب،کسی پارٹی اورفنکشن میں کہیں نظر آئے۔
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مسیحى دینیات اور بىن المذاہب تعلقات

Christianity in itself is a reformative offshoot of Judaism rather than a separate faith. The massage of Jesus Christ was directed at Jews and Jew formed the core of his early follower. In his early stage he was respected, honored and welcomed by his jew community. But as soon as he projected the universalism of Torah (Pentateuch) and declared Judaism as Inclusive religion the community fell in hostility toward him and  led him to crucify. In his early theology he gave the message of love, respect and tolerance to the light of a candle in room. The New Testament and it satellite portions unveil his and of his early followers teachings and their theological trend and behavior towards other nations and faiths. In this article the above mentioned teachings and theological policy of Jesus Christ and Saint Paul, an immediate stream him of Christianity has been abstracted from New Testament. It may help today’s Christianity to revise it religious teachings toward Islam and blasphemous behavior other religions and hence minimize the political tensions throughout the world.   

Studies on Biochemical and Hematological Parameters in Workers of Iron and Steel Industries Exposed to Heat Stress

In the present work, 203 iron and steel industrial units located in and around Lahore were surveyed to gather information regarding physical parameters, processes involved, product types, raw materials used, fuel types, mode of employment, working conditions and use of PPEs in these units. General health and socio-economic status, disease history and anthropometric measurements of 656 workers from different work points were measured. Total serum proteins, albumin, ALT, AST and ALP were photometrically analyzed. Haematological parameters i.e., TLC, DLC, RBC, Hgb, Hct%, MCV, MCH, MCHC and platelet counts were made on automated haematology analyzer. Data was statistically analyzed on the basis of work points, job duration and worker’s age using ANOVA and students t-test at SPSS 13.0 version. Survey results revealed that the working conditions in these units are not satisfactory. Workers are exposed to variety of hazards. Socio-economic status of the workers also portrayed a dismal condition. Biochemical analysis showed general trend of increased concentration of total serum proteins, albumin and globulins, suggesting dehydration and non-specific infections as probable cause. Old workers working at comparatively higher temperature point showed more evident changes in total protein contents as compared to the young workers at the same points. ALT and AST, although within normal reference range, were evidently towards the higher limits in almost all categories of the workers. Younger and oldest workers with shortest and longest job duration presented higher value for ALT and AST as compared to the middle aged workers and with medium job duration. ALP is found significantly higher in all categories of workers depicting the obvious response to environmental stress. Physical activity along with the temperature appeared to be the contributory to enhance ALP activity. Although the haematological parameters did not show any direct correlation with the job duration or worker’s age but increased WBCs in circulation along with the complementary increase in lymphocytes number reflects the elicitation of immune response in these subjects. Hemoglobin, RBCs, Hct%, MCV, MCH, MCHC and platelets are found to show alteration, in general indicating a stress on the hematopoietic system to cope with the stress of hypoxic conditions and enhanced demand of energy due to heavy physical exertion. The results suggest that work point temperature along with heavy physical activity probably causes effects on liver physiology and also the hematopoietic system as apart of compensatory response. The results suggest more detailed studies with reference to heat stress and protein profile with special emphasis of the role of Hsps. Along with the detailed haematological investigations; studies on liver and kidney physiology are also recommended to understand the effect on hormones and electrolytes under hyperthermic conditions. Strict monitoring and enforcement of rules for the workers health and safety are strongly recommended.