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International Conference on

Recent Trends in Environmental Sustainability

ESCON22/FWSH/14
Quantitative assessment of Pb accumulation in rice receiving industrial effluents and its
remediation with organic amendments

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Asad Jamil , Muhammad Zia ur Rehman , Muhammad Rizwan , Muhammad Javid Qamar ,
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Muhammad Umair
1 Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad
2 Department of Environmental Science and Engineering, Government College University,
Faisalabad
3 Soil and Water Testing Laboratory, Bahawalpur
Correspondence: ziasindhu1399@gmail.com
Abstract

The injudicious use of wastewater for irrigation is the main source of heavy metals
accumulation in soil and plants. The heavy metals not only retardate the plant growth but also
causes toxicity in human by entering into food chain. Among these HMs, lead (Pb) in soil plant
system severely cause toxicity in ecosystem. Pb toxicity can be reduced by using some organic
and inorganic amendments. An experiment was conducted at wire-house of Institute of Soil
and Environmental Sciences, University of Agriculture Faisalabad, to investigate the effect of
biochar (BC), farmyard manure (FYM) and dilution of wastewater with canal water on the
bioavailability and uptake in rice. The treatment plan of the experiment was T1= Contaminated
control, T2= Dilution of industrial effluent with fresh water @ 2:1, T3= Dilution of industrial
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effluent with fresh water @ 1:1, T4= FYM @ 5 t ha , T5= FYM @ 10 t ha , T6= BC @ 5 t ha -
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1 , T7= BC @ 10 t ha . All the amendments significantly reduced the bioavailable concentration
of Pb in soil as compared to control. Maximum decrease in soil Cd concentration was found in
T7 (73.03%) followed by T6 (63.57%) > T5 (59.11%) > T2 (58.58%) > T3 (56.74%) > T4
(56.65%) as compared with control. Similarly, maximum decrease in shoot Pb concentration
was observed in the T7 (85.65%), followed by T5 (84.20%) > T3 (75.34%) > T6 (74.31%) > T4
(66.31%) > T2 (64.70%) as compared with the control. The maximum decrease of Pb
concentration in paddy was also observed in T7 (90.61%) followed by T6 (81.04%) > T5
(78.26%) > T4 (76.78%) > T2 (64.70%) > T3 (60.35%) as compared with control. Highest value
of immobilization index in soil also found for T7 (90.61%). It is concluded from current study
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that among the applied treatments BC @ 10 t ha was most efficient in reducing the Pb
concentration in soil-plant system.

Keywords: soil pollution; soil remediation; wastewater; biochar; farmyard manure

Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus

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