The Immobilization of Cd and Pb in Contaminated Soil Around Mines in Mountainous Area of Northern Hebei

doi:10.11923/j.issn.2095-4050.cjas20200200031

Abstract

Abstract:

According to Cd and Pb pollution status in soil around mines in mountainous area of northern Hebei, the content of available Cd and Pb were studied after adding combinations of lime, montmorillonite, biochar and zeolites with different amounts (0.5%, 1%, 3%, 5%) by a soil culture experiment in laboratory, aiming to screen a soil conditioner with good effect. The results indicated that the content of available Cd, available Pb and pH in the soil were changed by different kinds and amounts of soil conditioners. The content of available Cd and Pb in the soil decreased with the increase of soil conditioner. Meanwhile, the immobilization effect of combinations of materials on the available Cd and Pb in soil was better than that of single material. The combination of 20%-30% lime, 10%-20% montmorillonite, 40%-50% biochar and 0-30% zeolites had the best decreasing effect on the content of available Cd and Pb in the soil around mines in mountainous area of northern Hebei.

Key words: Mountainous Area of Northern Hebei, Heavy Metal Pollution, Soil Conditioner, Immobilization, Biochar

CLC Number:

S318

Xue Zhongcai, Ma Fangfang, Liu Jie. The Immobilization of Cd and Pb in Contaminated Soil Around Mines in Mountainous Area of Northern Hebei[J]. Journal of Agriculture, 2021, 11(2): 50-56.

Figures/Tables 7

References 31

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种类	添加量/%
种类	0	0.5	1	3	5
T1	0.92±0.06 a	0.77±0.02 b	0.78±0.06 b	0.69±0.04 c	0.60±0.05 d
T2	0.92±0.06 a	0.92±0.04 a	0.91±0.07 a	0.79±0.03 b	0.82±0.07 b
T3	0.92±0.06 a	0.82±0.01 b	0.79±0.04 bc	0.78±0.02 bc	0.75±0.04 c
T4	0.92±0.06 a	0.84±0.09 b	0.82±0.08 b	0.69±0.05 c	0.57±0.05 d
T5	0.92±0.06 a	0.71±0.02 b	0.64±0.13 c	0.60±0.08 c	0.59±0.04 c
T6	0.92±0.06 a	0.65±0.05 b	0.63±0.03 b	0.62±0.03 b	0.62±0.02 b
T7	0.92±0.06 a	0.76±0.02 b	0.73±0.02 b	0.66±0.02 c	0.64±0.03 c

种类	添加量/%
种类	0	0.5	1	3	5
T1	0.92±0.06 a	0.77±0.02 b	0.78±0.06 b	0.69±0.04 c	0.60±0.05 d
T2	0.92±0.06 a	0.92±0.04 a	0.91±0.07 a	0.79±0.03 b	0.82±0.07 b
T3	0.92±0.06 a	0.82±0.01 b	0.79±0.04 bc	0.78±0.02 bc	0.75±0.04 c
T4	0.92±0.06 a	0.84±0.09 b	0.82±0.08 b	0.69±0.05 c	0.57±0.05 d
T5	0.92±0.06 a	0.71±0.02 b	0.64±0.13 c	0.60±0.08 c	0.59±0.04 c
T6	0.92±0.06 a	0.65±0.05 b	0.63±0.03 b	0.62±0.03 b	0.62±0.02 b
T7	0.92±0.06 a	0.76±0.02 b	0.73±0.02 b	0.66±0.02 c	0.64±0.03 c

种类	添加量/%
种类	0	0.5	1		3		5
T1	29.10±2.30 a	25.53±2.44 b	24.23±1.34 b	20.30±1.31 c		12.00±2.55 d
T2	29.10±2.30 a	28.10±1.61 a	27.67±2.76 b	27.97±1.50 b		27.45±2.63 b
T3	29.10±2.30 a	25.43±1.82 b	24.50±1.32 b	23.57±1.24 b		22.33±2.21 b
T4	29.10±2.30 a	26.73±6.56 a	29.63±2.40 a	21.00±1.65 b		17.37±2.05 c
T5	29.10±2.30 a	21.87±0.95 bc	17.93±3.45 c	20.33±2.55 bc		24.00±1.19 b
T6	29.10±2.30 a	24.5±3.55 b	23.00±1.79 b	24.77±0.23 b		25.37±1.46 b
T7	29.10±2.30 a	25.45±1.02 b	25.00±0.95 b	21.10±1.10 c		19.70±0.30 c

种类	添加量/%
种类	0	0.5	1		3		5
T1	29.10±2.30 a	25.53±2.44 b	24.23±1.34 b	20.30±1.31 c		12.00±2.55 d
T2	29.10±2.30 a	28.10±1.61 a	27.67±2.76 b	27.97±1.50 b		27.45±2.63 b
T3	29.10±2.30 a	25.43±1.82 b	24.50±1.32 b	23.57±1.24 b		22.33±2.21 b
T4	29.10±2.30 a	26.73±6.56 a	29.63±2.40 a	21.00±1.65 b		17.37±2.05 c
T5	29.10±2.30 a	21.87±0.95 bc	17.93±3.45 c	20.33±2.55 bc		24.00±1.19 b
T6	29.10±2.30 a	24.5±3.55 b	23.00±1.79 b	24.77±0.23 b		25.37±1.46 b
T7	29.10±2.30 a	25.45±1.02 b	25.00±0.95 b	21.10±1.10 c		19.70±0.30 c

种类	添加量/%
种类	0	0.5	1		3		5
T1	5.71±0.34 d	7.82±0.33 c	8.39±0.88 c	11.56±0.51 b		12.17±0.73 a
T2	5.71±0.34 a	5.76±0.18 a	5.73±0.04 a	6.08±0.66 a		5.87±0.41 a
T3	5.71±0.34 c	6.19±0.26 b	6.38±0.67 b	6.57±0.07 ab		6.97±0.20 a
T4	5.71±0.34 b	7.70±0.17 a	7.69±0.12 a	7.62±0.02 a		7.79±0.08 a
T5	5.71±0.34 d	7.54±0.03 c	7.76±0.10 c	9.54±1.01 b		10.40±0.65 a
T6	5.71±0.34 d	7.26±0.27 c	7.80±0.13 c	8.70±0.32 b		9.45±0.39 a
T7	5.71±0.34 c	6.27±0.10 b	6.69±0.36 b	7.61±0.12 a		7.85±0.11 a