Abstract
Abstract The objective of this study was to assess the effects of soil pH adjustment and treatment with sludge on plant growth and cadmium (Cd) accumulation in Chinese cabbage (pak choi) grown in Cd-contaminated soils. Soil was artificially spiked to raise its final Cd concentration to 10 mg/kg, adjusted to different pH values, and then supplemented with 5% sludge: either biosolids (BS) from wastewater treatment or sludge from drinking water treatment (WTS). Pak choi seeds were sown and the seedlings potted in the treated soil, then grown in a greenhouse for 45 days. The added Cd was present mainly in the exchangeable fraction and its concentration correlated to Cd accumulation in the roots and shoots. Adjustment of pH and application of sludge affected the Cd concentration in different fractions. Addition of WTS and adjustment to pH 7.0 inhibited growth and Cd accumulation in the pak choi. Addition of BS increased the soil nutrient content and thus enhanced growth and Cd accumulation. If pak choi were the only form of vegetable intake, consumption of pak choi grown in the Cd-spiked soils used in this study would exceed the maximum acceptable intake (60 μg/day) proposed by the World Health Organization. Keywords: biosolids (BS)cadmium (Cd)pak choidrinking water treatment sludge (WTS) Acknowledgement The authors would like to thank the National Science Council of the Republic of China for financially supporting this research under Contract No. NSC96-2313-B-451-006.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Exchangeable soil Cd was correlated with Cd accumulation in roots and shoots.
- Taxon
- pak choie1
- Organ / stage
- roots and shootse0
- Compound
- Cde0
- Outcome
- Cd accumulation in the roots and shootse0
Not reportedDirection
Verbatim
e0“The added Cd was present mainly in the exchangeable fraction and its concentration correlated to Cd accumulation in the roots and shoots”
e1“Chinese cabbage (pak choi)”
Claim · model-written summary
Soil pH adjustment and sludge changed Cd concentrations across soil fractions.
- Taxon
- pak choie1
- Treatment
- Adjustment of pH and application of sludgee0
- Outcome
- Cd concentration in different fractionse0
Not reportedComparatorDirection
Verbatim
e0“Adjustment of pH and application of sludge affected the Cd concentration in different fractions”
e1“growth and Cd accumulation in the pak choi”
Claim · model-written summary
WTS addition with pH 7.0 inhibited pak choi growth.
- Taxon
- pak choie0
- Treatment
- Addition of WTS and adjustment to pH 7.0e0
- Outcome
- growthe0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“Addition of WTS and adjustment to pH 7.0 inhibited growth and Cd accumulation in the pak choi”
Claim · model-written summary
WTS addition with pH 7.0 inhibited Cd accumulation in pak choi.
- Taxon
- pak choie0
- Treatment
- Addition of WTS and adjustment to pH 7.0e0
- Outcome
- Cd accumulatione0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“Addition of WTS and adjustment to pH 7.0 inhibited growth and Cd accumulation in the pak choi”
Claim · model-written summary
BS addition increased soil nutrient content.
Not reportedComparator
Verbatim
e0“Addition of BS increased the soil nutrient content and thus enhanced growth and Cd accumulation”
e1“Addition of BS increased the soil nutrient content and thus enhanced growth and Cd accumulation. If pak choi”
Claim · model-written summary
BS addition enhanced pak choi growth.
Not reportedComparator
Verbatim
e0“Addition of BS increased the soil nutrient content and thus enhanced growth and Cd accumulation”
e1“Addition of BS increased the soil nutrient content and thus enhanced growth and Cd accumulation. If pak choi”
Claim · model-written summary
BS addition enhanced Cd accumulation in pak choi.
Not reportedComparator
Verbatim
e0“Addition of BS increased the soil nutrient content and thus enhanced growth and Cd accumulation”
e1“Addition of BS increased the soil nutrient content and thus enhanced growth and Cd accumulation. If pak choi”
Claim · model-written summary
Pak choi from the Cd-spiked soils would exceed the stated acceptable intake if it were the sole vegetable.
Verbatim
e0“consumption of pak choi grown in the Cd-spiked soils used in this study would exceed the maximum acceptable intake (60 μg/day)”
The same questions in other papers
ph · growth · Brassica rapa (field mustard)Positive and negative results
1 in the opposite direction
- positive
ph · nutrient: content · Brassica rapa (field mustard)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
organic · growth · Brassica rapa (field mustard)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →irrigation · growth · Brassica rapa (field mustard)Positive and negative results
4 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 papers →irrigation · nutrient: content · Brassica rapa (field mustard)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →organic · nutrient: content · Brassica rapa (field mustard)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.